Coating machine and control method thereof

Abstract

The invention provides a coating machine and a control method thereof to solve the problem that manual operation affects the coating width and precision, the coating machine comprises a coating die head, the coating die head is suitable for uniformly coating a coating on the surface of a base material, two baffles are arranged at intervals in the width direction of a pole piece to restrain the displacement of the pole piece in the width direction of the pole piece, and the coating die head is suitable for coating the coating on the surface of the base material. The width direction of the pole piece is perpendicular to the coating direction, the deviation rectifying sensor is suitable for obtaining the distance F between the deviation rectifying sensor and the edge of the pole piece, and the centering sensor is suitable for obtaining the vertical distance d1 between the pole piece and one baffle in the width direction of the pole piece and the vertical distance d2 between the pole piece and the other baffle in the width direction of the pole piece; the driving assembly is suitable for synchronously driving the two baffles to move in the width direction of the pole piece, so that the requirement for coating width precision is met, the requirement that blank areas on the two sides of coating are matched with the width of a pole lug is met, the situation that slurry is wasted and the coating progress is affected easily due to repeated manual operation is avoided, and therefore the production efficiency and the production quality are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of pole piece processing, and in particular to a coating machine and a control method thereof. Background Art

[0002] In the production process of various types of batteries, battery pole processing is a key component, and coating technology plays a vital role in the battery production process. Battery poles are usually composed of a metal substrate (such as aluminum foil or copper foil) and electrode active materials (such as positive electrode materials and negative electrode materials). The electrode active materials can react with ions in the electrolyte to store and release electrical energy. The coating process of the pole piece is mainly to evenly coat these electrode materials on the metal substrate to form a battery pole piece with good electrical conductivity and stability.

[0003] In order to meet the size requirements of the electrode coating, in the relevant technology, the operator needs to manually adjust the coating width, but the coating width accuracy requirement is very high. Before the production process, the operator needs to make multiple adjustments to ensure that the coating width accuracy requirements are met and the blank areas on both sides of the coating are adapted to the width requirements of the electrode ears. Multiple manual operations can easily cause waste of slurry and affect the progress of coating, thereby reducing production efficiency and production quality. Summary of the invention

[0004] In view of this, the present invention provides a coating machine and a control method thereof to solve the problem that manual operation affects the coating width and accuracy.

[0005] In a first aspect, the present invention provides a coating machine suitable for coating an active material layer on a substrate to obtain an electrode; the coating machine comprises:

[0006] Coating die head;

[0007] Two baffles are arranged at intervals along the width direction of the electrode piece, and the extending direction of the baffles is parallel to the coating direction; the spacing between the two baffles is suitable for restricting the width of the active material layer along the width direction of the electrode piece; wherein the width direction of the electrode piece is perpendicular to the coating direction;

[0008] A deflection correction sensor is arranged on one side of the pole piece along the width direction of the pole piece, and the deflection correction sensor is suitable for obtaining a distance F from the edge of the pole piece;

[0009] A centering sensor is disposed between the two baffles, and the centering sensor is suitable for obtaining a vertical distance d1 from one of the baffles along the width direction of the pole piece, and a vertical distance d2 from the other baffle along the width direction of the pole piece;

[0010] The driving assembly is connected to the two baffles and is suitable for synchronously driving the two baffles to move along the width direction of the pole piece; the distance the two baffles move along the width direction of the pole piece is d3, satisfying: d3=F-F0, where F0 is the standard distance between the correction sensor and the edge of the pole piece.

[0011] Beneficial effect: The present invention provides a coating machine suitable for coating an active material layer on a substrate to obtain an electrode; the coating machine comprises: a coating die head, the coating die head is suitable for uniformly coating the coating on the surface of the substrate, two baffles are arranged at intervals along the width direction of the electrode piece, and the displacement of the electrode piece along the width direction of the electrode piece is restricted, which is conducive to uniform coating of the active material layer to the substrate, the width direction of the electrode piece is perpendicular to the coating direction, and the perpendicularity to each other makes it more convenient and intuitive to adjust the width, the deviation correction sensor is suitable for obtaining the distance F from the edge of the electrode piece, and the distance from the edge of the electrode piece can be monitored in real time, so that the baffle can adjust the position of the electrode piece in time to make the electrode piece run on the correct path, and the centering sensor is suitable for In order to obtain the vertical spacing d1 from one of the baffles along the width direction of the pole piece and the vertical spacing d2 from the other baffle along the width direction of the pole piece, the position of the two baffles from the center sensor can be monitored in real time, which is conducive to the baffle to adjust the position of the pole piece in time. The driving component is suitable for synchronously driving the two baffles to move along the width direction of the pole piece. The driving component is the power source for the movement of the baffle. The operator does not need to make multiple adjustments to ensure that the coating width accuracy requirements are met and the blank areas on both sides of the coating are adapted to the width requirements of the pole ears, avoiding multiple manual operations that can easily cause waste of slurry and affect the progress of coating, thereby improving production efficiency and production quality.

[0012] In an optional embodiment, the driving assembly further includes: a push rod, which is arranged along the width direction of the pole piece and has one end connected to a side of the baffle away from the substrate; and a driving member, the other end of the push rod being connected to the driving member.

[0013] Beneficial effects: The drive component provides the required power for the baffle to ensure its normal operation, and can accurately control the movement direction, speed and position of the baffle to meet operational requirements. At the same time, the drive component has a feedback function and can adjust the operating status in real time.

[0014] In an optional embodiment, the deviation correction sensor and the centering sensor are electrically connected to the driving assembly.

[0015] Beneficial effects: The deviation correction sensor and the centering sensor are electrically connected to the driving component, and the electrical signals of the deviation correction sensor and the centering sensor can be fed back to the driving component in real time, thereby realizing real-time monitoring and synchronous correction.

[0016] In a second aspect, the present invention further provides a coating machine control method, which is applied to the coating machine as described above, and the coating machine control method comprises:

[0017] Obtain the distance F between the deviation correction sensor and the edge of the pole piece;

[0018] Based on the spacing F, the vertical spacing d1 between the centering sensor and one of the baffles along the width direction of the pole piece is adjusted, so that d1=d1'-d3; based on the spacing F, the vertical spacing d2 between the centering sensor and the other baffle along the width direction of the pole piece is adjusted, so that d2=d2'+d3; wherein d1' is the vertical spacing between the centering sensor and one of the baffles along the width direction of the pole piece before adjustment, d2' is the vertical spacing between the centering sensor and the other baffle along the width direction of the pole piece before adjustment, d3 is the distance between the two baffles along the width direction of the pole piece, and satisfies: d3=F-F0, wherein F0 is the standard spacing between the deviation correction sensor and the edge of the pole piece;

[0019] Based on the change of the spacing F, the spacing d1 and the spacing d2 are dynamically adjusted.

[0020] Beneficial effects: The present invention provides a coating machine control method, which utilizes a centering sensor and a deviation correction sensor to dynamically adjust the spacing d1 and the spacing d2 to ensure that the pole piece is always in the coating position, thereby improving accuracy, avoiding material waste due to offset, reducing production costs, ensuring the accurate position of the pole piece, and reducing product defects due to offset. Dynamic adjustment reduces manual intervention and improves the stability of the production line. At the same time, dynamic adjustment can adapt to pole pieces of different widths and improve equipment flexibility.

[0021] In an optional embodiment, before obtaining the distance F between the deviation correction sensor and the edge of the pole piece, the method further includes:

[0022] placing the substrate at a preset coating position;

[0023] Adjust both baffles back to the preset points;

[0024] Fix one of the baffles and move the other baffle by a distance of H, so that the width between the two baffles is the required coating width;

[0025] The coating die was opened.

[0026] Beneficial effects: By adjusting the baffle, ensure that the coating width meets the requirements and avoids being too wide or too narrow, fix one baffle and move the other baffle, simplify the operation steps, and preset the coating position and preset points to make the method streamlined and standardized.

[0027] In an optional embodiment, both baffles are adjusted back to the preset point, including: the correction sensor sets the preset point, transmits the preset point position to the drive component, and the drive component drives the baffle to move to the preset point.

[0028] Beneficial effect: The deviation correction sensor transmits the preset point to the driving component, and the driving component drives the baffle to move to the preset point. The baffle can be set at the initial preset position, making this step streamlined and standardized.

[0029] In an optional embodiment, the preset points of the two baffles are at the same distance from the center sensor, and the distance between the preset points of the two baffles is half of the width of the coating die.

[0030] Beneficial effect: The preset points of the two baffles are at the same distance from the center sensor, and the distance between the preset points of the two baffles is half the width of the coating die head, which saves the moving distance of the baffles. For coating requirements of different widths, the baffles move to the correct position faster, thereby improving work efficiency.

[0031] In an optional implementation, the distance value H includes: the distance value H is the difference between the distance between the two baffle preset points and the required coating width value.

[0032] Beneficial effect: The distance value H is the difference between the distance between the two baffle preset points and the required coating width value. The value of the distance value H can be accurately calculated to facilitate timely adjustment of the baffle distance to ensure the correct coating width.

[0033] In an optional implementation, the required coating width value includes: the required coating width value is a pole piece coating width value.

[0034] Beneficial effect: The required coating width value is the electrode coating width value, and the electrode coating width corresponds to the coating width, thereby ensuring the correct movement of the baffle.

[0035] In an optional embodiment, the required coating width does not exceed the width of the coating die along the width direction of the pole piece.

[0036] Beneficial effect: The required coating width does not exceed the width of the coating die along the width direction of the pole piece, which ensures the work quality and avoids the situation where the required coating width is greater than the width of the coating die along the width direction of the pole piece, making coating impossible.

[0037] Because the coater control method includes the coater and has the same effect as the coater, it will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0039] Figure 1 is a schematic diagram of a coating machine of the present invention;

[0040] Figure 2It is a schematic diagram of the dynamic adjustment of the coating machine of the present invention;

[0041] Description of reference numerals:

[0042] 1. Substrate; 11. Active material layer; 12. Coating die; 13. Pole piece; 14. Baffle; 301. Centering sensor; 302. Correction sensor; 4. Driving assembly; 41. Driving member; 42. Push rod. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0044] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0045] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0047] Battery electrode coating refers to the process of coating the positive and negative electrodes (usually metal substrates) of the battery with active materials that can store and release electrical energy during the charge and discharge process. This coating process is one of the key steps in battery manufacturing, which usually involves mixing conductive powders (such as lithium cobalt oxide, graphite, etc.) with adhesives, conductive agents, etc. into a slurry, and then evenly coating the slurry on the metal substrate.

[0048] Although manual coating of battery electrodes may be a feasible option in small-scale production or laboratory research, manual coating has many obvious disadvantages in industrial production. Manual operation often makes it difficult to ensure the uniformity of the coating, and it is difficult to achieve consistency in the thickness, viscosity control and coating speed of the coating. Therefore, the coating on the surface of the electrode may be uneven in thickness, which directly affects the performance of the battery, may cause unstable battery capacity, and even affect the cycle life of the battery. The speed of manual coating is far slower than that of automated equipment. Since each electrode needs to be coated manually, production efficiency will be greatly reduced, making it difficult to meet the needs of large-scale production. At the same time, since the coating width accuracy requirements are very high, manual adjustment of the coating width cannot meet the coating width accuracy requirements, which can easily cause waste of slurry and affect the coating progress, thereby reducing production efficiency and production quality.

[0049] The invention provides a coating machine to solve the problem that manual operation affects the coating width and accuracy.

[0050] Combine the following Figure 1 to Figure 2 , describing an embodiment of the present invention.

[0051] According to an embodiment of the present invention, on one hand, a coating machine is provided, which is suitable for coating an active material layer 11 on a substrate 1 to obtain a pole piece 13; the coating machine comprises:

[0052] Coating die 12;

[0053] Two baffles 14 are spaced apart in the width direction of the electrode piece, and the extending direction of the baffles 14 is parallel to the coating direction; the spacing between the two baffles 14 is suitable for restricting the width of the active material layer 11 in the width direction of the electrode piece; wherein the width direction of the electrode piece is perpendicular to the coating direction;

[0054] A deflection correction sensor 302 is disposed on one side of the pole piece 13 along the width direction of the pole piece, and the deflection correction sensor 302 is suitable for obtaining a distance F from the edge of the pole piece 13;

[0055] A centering sensor 301 is disposed between two baffles 14, and the centering sensor 301 is suitable for obtaining a vertical distance d1 from one of the baffles 14 along the width direction of the pole piece, and a vertical distance d2 from the other baffle 14 along the width direction of the pole piece;

[0056] The driving assembly 4 is connected to the two baffles 14 and is suitable for synchronously driving the two baffles 14 to move along the width direction of the pole piece; the distance moved by the two baffles 14 along the width direction of the pole piece is d3, satisfying: d3=F-F0, where F0 is the standard spacing between the correction sensor 302 and the edge of the pole piece 13.

[0057] The present invention provides a coating machine, which is suitable for coating an active material layer 11 on a substrate 1 to obtain an electrode 13; the coating machine comprises: a coating die 12, the coating die 12 is suitable for uniformly coating the coating on the surface of the substrate 1, two baffles 14 are arranged at intervals along the width direction of the electrode, and the displacement of the electrode 13 along the width direction of the electrode is restricted, which is conducive to the uniform coating of the active material layer 11 to the substrate 1, the width direction of the electrode is perpendicular to the coating direction, and the two are perpendicular to each other, so that it is more convenient and intuitive to adjust the width, and the deviation correction sensor 302 is suitable for obtaining the distance F from the edge of the electrode 13, and the distance from the edge of the electrode 13 can be monitored in real time, so that the baffle 14 can adjust the position of the electrode 13 in time, so that the electrode 13 runs on the correct path, and the centering sensor The sensor 301 is suitable for obtaining the vertical spacing d1 from one of the baffles 14 along the width direction of the pole piece and the vertical spacing d2 from the other baffle 14 along the width direction of the pole piece. The position of the two baffles 14 from the center sensor 301 can be monitored in real time, which is beneficial for the baffle 14 to adjust the position of the pole piece 13 in time. The driving component 4 is suitable for synchronously driving the two baffles 14 to move along the width direction of the pole piece. The driving component 4 is the power source for the movement of the baffle 14. The operator does not need to make multiple adjustments to ensure that the coating width accuracy requirements are met and the blank areas on both sides of the coating are adapted to the width requirements of the pole ears, thereby avoiding multiple manual operations that easily cause waste of slurry and affect the progress of coating, thereby improving production efficiency and production quality.

[0058] The substrate 1 is placed horizontally, the baffle 14 and the coating die 12 are placed on the surface of the substrate 1, the baffle 14 is placed along the coating direction, the coating die 12 is placed along the width direction of the pole piece, and the uncoated area next to the pole piece 13 is a blank area to adapt to the pole ear.

[0059] As an implementation form, the active material layer 11 may be a mixture of conductive powder (such as lithium cobalt oxide, graphite, etc.) and a binder, a conductive agent, and the like.

[0060] In some embodiments, in combination Figure 1 As shown, the driving assembly 4 also includes: a push rod 42, which is arranged along the width direction of the pole piece and has one end connected to the side of the baffle 14 away from the substrate 1; and a driving member 41, the other end of the push rod 42 is connected to the driving member 41.

[0061] The driving component 4 provides the required power for the baffle 14 to ensure its normal operation, and can accurately control the movement direction, speed and position of the baffle 14 to meet operational requirements. At the same time, the driving component 4 has a feedback function and can adjust the operating status in real time.

[0062] As an implementation form, the push rod 42 and the driving member 41 are combined into a stepping motor and a lead screw nut to achieve the displacement of the baffle 14. Optionally, the push rod 42 and the driving member 41 can also be driven by a hydraulic rod.

[0063] In some embodiments, in combination Figure 1 As shown, the deflection correction sensor 302 and the centering sensor 301 are electrically connected to the driving component 4, and the electrical signals of the deflection correction sensor 302 and the centering sensor 301 can be fed back to the driving component 4 in real time to achieve real-time monitoring and synchronous correction.

[0064] Optionally, there may be multiple deviation correction sensors 302 and centering sensors 301, and the read values ​​are averaged to reduce single errors and improve coating accuracy.

[0065] According to an embodiment of the present invention, on the other hand, a coating machine control method is provided, comprising: obtaining a distance F between the deviation correction sensor 302 and the edge of the pole piece 13;

[0066] Based on the spacing F, the vertical spacing d1 between the centering sensor 301 and one of the baffles 14 along the width direction of the pole piece is adjusted, so that d1=d1'-d3; based on the spacing F, the vertical spacing d2 between the centering sensor 301 and the other baffle 14 along the width direction of the pole piece is adjusted, so that d2=d2'+d3; wherein d1' is the vertical spacing between the centering sensor 301 and one of the baffles 14 along the width direction of the pole piece before adjustment, d2' is the vertical spacing between the centering sensor 301 and the other baffle 14 along the width direction of the pole piece before adjustment, d3 is the distance between the two baffles 14 and the width direction of the pole piece, and satisfies: d3=F-F0, wherein F0 is the standard spacing between the deviation correction sensor 302 and the edge of the pole piece 13;

[0067] Based on the change of the spacing F, the spacing d1 and the spacing d2 are dynamically adjusted.

[0068] The present invention provides a coating machine control method, which utilizes a centering sensor 301 and a deviation correction sensor 302 to dynamically adjust the spacing d1 and the spacing d2 to ensure that the pole piece 13 is always in the coating position, thereby improving accuracy, avoiding material waste due to offset, reducing production costs, ensuring the accurate position of the pole piece 13, and reducing product defects due to offset. Dynamic adjustment reduces manual intervention and improves the stability of the production line. At the same time, dynamic adjustment can adapt to pole pieces 13 of different widths and improve equipment flexibility.

[0069] When the pole piece 13 is displaced, according to the standard spacing F0 between the deviation correction sensor 302 and the edge of the pole piece 13, the baffle 14 is driven by the driving component 4, and the vertical spacing of the centering sensor 301 from one of the baffles 14 along the width direction of the pole piece is adjusted to d1, d1' is the vertical spacing of the centering sensor 301 from one of the baffles 14 along the width direction of the pole piece before adjustment, so when the pole piece 13 is displaced, the baffle 14 is displaced, so that d1=d1'-d3, similarly, the spacing between the two baffles 14 is kept consistent, and the vertical spacing d2 between the centering sensor 301 and the other baffle 14 along the width direction of the pole piece is adjusted, so that d2=d2'+d3, d2' is the vertical spacing of the centering sensor 301 from the other baffle 14 along the width direction of the pole piece before adjustment, after the above adjustment, the spacing d1 and the spacing d2 are dynamically adjusted, which can ensure that the pole piece 13 is always in the correct coating position under the action of the baffle 14.

[0070] In some embodiments, in combination Figure 2 As shown, before obtaining the distance F between the deviation correction sensor 302 and the edge of the pole piece 13, the method further includes:

[0071] Placing the substrate 1 at a preset coating position;

[0072] Adjust both baffles 14 back to the preset points;

[0073] Fix one of the baffles 14 and move the other baffle 14 by a distance H, so that the width between the two baffles 14 is the desired coating width;

[0074] The coating die 12 is opened.

[0075] By adjusting the baffle 14, ensure that the coating width meets the requirements and avoids being too wide or too narrow, fix one baffle 14 and move the other baffle 14, simplify the operation steps, and preset the coating position and preset points to make the method streamlined and standardized.

[0076] As an implementation form, both baffles 14 are adjusted back to the preset point, including the correction sensor 302 setting the preset point, transmitting the preset point position to the drive component 4, the drive component 4 driving the baffle 14 to move to the preset point, the correction sensor 302 transmitting the preset point to the drive component 4, the drive component 4 driving the baffle 14 to move to the preset point, the baffle 14 can be set at the initial preset position, so that this step is streamlined and standardized.

[0077] Furthermore, the preset points of the two baffles 14 are at the same distance from the center sensor 301, and the distance between the preset points of the two baffles 14 is half the width of the coating die 12, which saves the moving distance of the baffle 14. For coating requirements of different widths, the baffle 14 moves to the correct position faster, thereby improving work efficiency.

[0078] Furthermore, the distance value H is the difference between the distance between the preset points of the two baffles 14 and the required coating width value. The distance value H is the difference between the distance between the preset points of the two baffles 14 and the required coating width value. The value of the distance value H can be accurately calculated to facilitate timely adjustment of the baffle 14 distance to ensure the correct coating width. The required coating width value is the coating width value of the electrode 13. The coating width of the electrode 13 corresponds to the coating width, which ensures the correct movement of the baffle 14.

[0079] In some embodiments, in combination Figure 2 As shown, the required coating width does not exceed the width of the coating die 12 along the width direction of the pole piece, which ensures the work quality and avoids the situation where the required coating width is greater than the width of the coating die 12 along the width direction of the pole piece, so that coating cannot be performed.

[0080] Obviously, the above embodiments are only examples for clear explanation, and are not intended to limit the implementation methods. Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the present invention.

Claims

1. A coating machine, characterized in that: Suitable for coating an active material layer (11) onto a substrate (1) to obtain a pole piece (13); the coating machine comprises: Coating die (12); Two baffles (14) are arranged at intervals along the width direction of the electrode piece, and the extending direction of the baffles (14) is parallel to the coating direction; the spacing between the two baffles (14) is suitable for restricting the width of the active material layer (11) along the width direction of the electrode piece; wherein the width direction of the electrode piece is perpendicular to the coating direction; A deflection correction sensor (302) is arranged on one side of the pole piece (13) along the width direction of the pole piece, and the deflection correction sensor (302) is suitable for obtaining a distance F from an edge of the pole piece (13); A centering sensor (301) is arranged between the two baffles (14), and the centering sensor (301) is suitable for obtaining a vertical distance d1 from one of the baffles (14) along the width direction of the pole piece, and a vertical distance d2 from the other baffle (14) along the width direction of the pole piece; A driving assembly (4) is connected to the two baffles (14) and is suitable for synchronously driving the two baffles (14) to move along the width direction of the pole piece; the distance that the two baffles (14) move along the width direction of the pole piece is d3, which satisfies: d3 = F-F0, where F0 is the standard spacing between the correction sensor (302) and the edge of the pole piece (13).

2. The coating machine according to claim 1, characterized in that: The driving assembly (4) further comprises: A push rod (42), the push rod (42) being arranged along the width direction of the pole piece, and having one end connected to a side of the baffle (14) away from the substrate (1); A driving member (41), the other end of the push rod (42) is connected to the driving member (41).

3. The coating machine according to claim 2, characterized in that: The deviation correction sensor (302) and the centering sensor (301) are electrically connected to the driving component (4).

4. A coating machine control method, characterized in that: Applied to the coating machine as described in any one of claims 1 to 3 above, the coating machine control method comprises: Obtaining a distance F between the deviation correction sensor (302) and the edge of the pole piece (13); Based on the spacing F, the vertical spacing d1 of the centering sensor (301) from one of the baffles (14) along the width direction of the pole piece is adjusted, so that d1=d1'-d3; based on the spacing F, the vertical spacing d2 of the centering sensor (301) from the other baffle (14) along the width direction of the pole piece is adjusted, so that d2=d2'+d3; wherein d1' is the vertical spacing of the centering sensor (301) from one of the baffles (14) along the width direction of the pole piece before adjustment, d2' is the vertical spacing of the centering sensor (301) from the other baffle (14) along the width direction of the pole piece before adjustment, d3 is the distance moved by the two baffles (14) along the width direction of the pole piece, and the following is satisfied: d3=F-F0, wherein F0 is the standard spacing of the deviation correction sensor (302) from the edge of the pole piece (13); Based on the change of the spacing F, the spacing d1 and the spacing d2 are dynamically adjusted.

5. The coating machine control method according to claim 4, characterized in that: Before obtaining the distance F between the deviation correction sensor (302) and the edge of the pole piece (13), the method further comprises: Placing the substrate (1) at a preset coating position; Adjusting the two baffles (14) back to the preset points; Fixing one of the baffles (14), and moving the other baffle (14) by a distance value H, so that the width between the two baffles (14) is the required coating width value; The coating die (12) is opened.

6. The coating machine control method according to claim 5, characterized in that: The step of adjusting the two baffles (14) back to the preset point comprises: The deflection correction sensor (302) sets the preset point, transmits the position of the preset point to the drive component (4), and the drive component (4) drives the baffle (14) to move to the preset point.

7. The coating machine control method according to claim 5, characterized in that: The preset points of the two baffles (14) are at the same distance from the centering sensor (301), and the distance between the preset points of the two baffles (14) is half the width of the coating die (12).

8. The coating machine control method according to claim 5, characterized in that: The distance value H includes: The distance value H is the difference between the distance between the preset points of the two baffles (14) and the required coating width value.

9. The coating machine control method according to claim 8, characterized in that: The required coating width value includes: The required coating width value is the coating width value of the pole piece (13).

10. The coating machine control method according to claim 9, characterized in that: The required coating width value does not exceed the width value of the coating die head (12) along the width direction of the pole piece.

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