Coating equipment and coating method

Abstract

This application discloses a coating apparatus and a coating method, the coating apparatus includes a coating die head and a slurry parameter detection member. The coating die head includes a first slit, a second slit, a first adjustment mechanism and a second adjustment mechanism. The first adjustment mechanism and the second adjustment mechanism are provided to realize the flow rate adjustment of the slurry flowing through the first slit and the second slit, and the slurry parameter detection member detects the parameters of the coated slurry, compares the slurry parameters with a preset value, and then feeds back to the first adjustment mechanism and the second adjustment mechanism to adjust the positions of the first adjustment member and the second adjustment member, thereby realizing the automatic adjustment of the coating by the two-layer die head, thereby greatly improving the effectiveness and accuracy of debugging, and further improving the coating efficiency.

Description

[Technical field]

[0001] This application relates to the technical field of battery electrode strip coating, and in particular to coating equipment and methods. [Background technology]

[0002] Lithium ion batteries have the advantages of high specific capacity, high operating voltage, no environmental pollution, long cycle life, wide operating temperature range, etc., and are therefore widely used in electronic products such as mobile phones, laptops, digital cameras, etc., as well as automobiles. With the rapid development of science and technology and the economy, the requirements for the performance of lithium ion batteries are becoming increasingly higher.

[0003] At present, the double-layer coating die head in the lithium battery industry is mainly adjusted manually, and the adjustment method has high requirements for the skills of the debugging personnel, and the debugging effectiveness is low and the efficiency is low. Summary of the Invention [Problem to be solved by the invention]

[0004] Therefore, the technical problem that the present application is intended to solve is the deficiency of the conventional two-layer coating die head in the prior art, which is that the debugging is ineffective and the efficiency is low due to the manual adjustment method adopted. [Means for solving the problem]

[0005] To this end, the present application provides a coating apparatus, A coating die head and a slurry parameter detection member are included, The coating die head comprises: a first slit and a second slit, the first slit being suitable for the passage of a first slurry and the second slit being suitable for the passage of a second slurry, the first slit and the second slit being provided at an angle; a first adjustment mechanism including a first driving member and a first adjustment member, the first driving member having a driving end connected to the first adjustment member; a second adjustment mechanism including a second driving member and a second adjustment member, the second driving member having a driving end connected to the second adjustment member; a slurry parameter detection member that is communicatively connected to the first adjustment mechanism and the second adjustment mechanism and detects slurry information of the electrode piece; the slurry parameter detection member detects slurry information of the first slurry coated on the electrode piece through the first slit to form a first slurry parameter, and the first adjustment mechanism adjusts a position of the first adjustment member based on the first slurry parameter to adjust a flow rate of the first slurry flowing through the first slit, and / or The slurry parameter detection member detects slurry information of the second slurry coated on the electrode piece through the second slit to form a second slurry parameter, and the second adjustment mechanism adjusts the position of the second adjustment member based on the second slurry parameter, thereby adjusting the flow rate of the second slurry flowing through the second slit.

[0006] Optionally, the coating apparatus further includes an upper mold, a middle mold, and a lower mold, the upper mold and the middle mold defining the first slit, and the lower mold and the middle mold defining the second slit; The first adjustment mechanism is provided in the upper die and / or the middle die, and the second adjustment mechanism is provided in the lower die and / or the middle die.

[0007] Optionally, the coating apparatus further comprises a first gasket and a second gasket; The first gasket is provided between the upper mold and the middle mold and defines the first slit together with the upper mold and the middle mold. The second gasket is provided between the middle mold and the lower mold, and defines the second slit together with the middle mold and the lower mold.

[0008] Optionally, in the coating apparatus, at an intersection of the first slit and the second slit, the upper and lower dies together define a die lip suitable for the outflow of a slurry; The lower die includes a deformation portion and a base portion, the deformation portion being provided on a side closer to the die lip and the base being provided on a side farther from the die lip, The second driving member is attached to the base, and the second adjustment member is connected to the deformation portion, and the second adjustment member has a die lip adjustment state in which the second driving member drives the deformation portion to move closer to or away from the base, and in the die lip adjustment state, the lower lip of the lower mold is warped relative to the upper lip of the upper mold.

[0009] Optionally, in the above coating equipment, the middle mold includes a first supply port, one end of the first supply port is adapted to be connected to a first supply system, and the other end of the first supply port is connected to the first slit; The lower mold includes a second supply port, one end of the second supply port is adapted to be connected to a second supply system, and the other end of the second supply port communicates with the second slit.

[0010] Optionally, in the coating apparatus, the slurry parameter detection member is a thickness detection member, and the thickness detection member detects a slurry thickness of the electrode piece; and / or The slurry parameter detection member is a surface density detection member, and the surface density detection member detects the surface density of the slurry on the electrode piece.

[0011] Optionally, in the coating apparatus, any of the adjustment mechanisms further includes a drive plate, the drive plate being communicatively connected to the drive member, the drive plate being communicatively connected to the slurry parameter detection member; The driving member drives and moves the adjustment member by driving the driving plate, thereby adjusting the flow rate of the slurry in the slit.

[0012] Optionally, the coating device further includes a bus base provided on at least one side of the adjustment mechanism, the bus base being communicatively connected to the drive plate.

[0013] Optionally, the coating device further includes a dispense mechanism including a dispense valve and a first dispense passage, the dispense valve being attached to the upper mold, the first dispense passage being provided in the upper mold, the first dispense passage being in communication with the first slit and the dispense valve; The dispensing mechanism further includes a second dispensing passage, the second dispensing passage being disposed in the middle mold, and the second dispensing passage communicating with the first slit and the second slit.

[0014] A coating method comprising the steps of: Coating the electrode strip with a second slurry; a slurry parameter detection member detecting a second slurry parameter of the electrode piece to form a first detection result; adjusting a second slurry parameter of the electrode piece by controlling a position of a second adjusting member based on the first detection result; ceasing to coat the electrode strips with the second slurry and coating the electrode strips with the first slurry; a slurry parameter detection member detecting a first slurry parameter of the electrode piece and forming a second detection result; and controlling a position of a first adjusting member based on the second detection result to adjust a first slurry parameter of the electrode piece.

[0015] Optionally, the coating method includes: intermittently stopping the coating of the electrode strip with the first slurry; and detecting a second slurry parameter of the electrode strip to form a third detection result.

[0016] Optionally, the coating method described above uses the coating equipment described above.

[0017] The technical solution of the present application has the following advantages:

[0018] In the coating equipment of this embodiment, a first adjustment mechanism and a second adjustment mechanism are provided to realize adjustment of the flow rate of the slurry flowing through the first slit and the second slit, and the slurry parameter detection member detects the parameters of the coated slurry, compares the slurry parameters with preset values, and then feeds back to the first adjustment mechanism and the second adjustment mechanism to realize adjustment by the first adjustment member and the second adjustment member, and realizes automatic adjustment of the coating by the two-layer die head, thereby greatly improving the effectiveness of debugging and further improving the coating efficiency.

[0019] In order to more clearly describe the embodiments of the present application or the technical solutions of the prior art, the drawings necessary for describing the embodiments or the prior art are briefly described below. It is obvious that the drawings described below are some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work. [Brief description of the drawings]

[0020] [Figure 1] FIG. 2 is a structural schematic diagram of a coating device according to an embodiment of the present application. [Diagram 2] FIG. 2 is a structural schematic diagram of a coating die head in a coating apparatus according to an embodiment of the present application. [Diagram 3] FIG. 3 is a cross-sectional view of FIG. 2. [Figure 4] FIG. 4 is a structural schematic diagram of a modified embodiment of the lower mold in the coating equipment according to the embodiment of the present application. [Diagram 5] FIG. 2 is a structural schematic diagram of a coating apparatus according to an embodiment of the present application when a first driving plate, a first adjusting member and a first driving member are engaged with each other. [Figure 6]FIG. 2 is a structural schematic diagram of a dispensing mechanism in a coating device according to an embodiment of the present application. [Figure 7] 1 is a flow chart of a coating method according to an embodiment of the present application. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] Hereinafter, the technical solutions of the present application will be described clearly and completely with reference to the drawings, and it is obvious that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. Based on the embodiments of the present application, all other embodiments that a person skilled in the art can obtain without creative labor fall within the scope of protection of the present application.

[0022] In the description of this application, the orientations or positional relationships indicated by the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," etc. are based on the orientations or positional relationships shown in the drawings, and are merely for the purpose of facilitating or simplifying the description of this application, and are not intended to limit the present application by not indicating or implying that such devices or elements have a particular orientation or are constructed and operated in a particular orientation. In addition, the terms "first," "second," and "third" are used merely for the purpose of description, and are not intended to indicate or imply relative importance.

[0023] In the description of this application, unless otherwise clearly specified and limited, the terms "attached", "coupled" and "connected" should be understood in a broad sense, for example, they may be fixedly connected, detachably connected or integrally connected, may be mechanically connected or electrically connected, may be directly connected or indirectly connected through an intermediate medium, or may be internal communication between two elements. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific situation.

[0024] Furthermore, the technical features of the various embodiments of the present application described below can be combined with each other unless they are inconsistent. Example 1

[0025] This embodiment provides a coating device, which includes a coating die head and a slurry parameter detection member 6, as shown in Figures 1 to 6. Here, the coating die head includes an upper die 1, a middle die 2, a lower die 3, a first adjustment mechanism 4 and a second adjustment mechanism 5. Here, the upper mold 1 and the middle mold 2 form a first slit 71 suitable for the flow of a first slurry, the lower mold 3 and the middle mold 2 form a second slit 72 suitable for the flow of a second slurry, the first slit 71 and the second slit 72 are arranged at an angle, a first adjustment mechanism 4 is provided in the upper mold 1, and includes a first driving member 41 and a first adjustment member 42, and the driving end of the first driving member 41 is connected to the first adjustment member 42, a second adjustment mechanism 5 is provided in the lower mold 3, and includes a second driving member 51 and a second adjustment member 52, and the driving end of the second driving member 51 is connected to the second adjustment member 52, and a slurry parameter detection member 6 is communicatively connected to the first adjustment mechanism 4 and the second adjustment mechanism 5, and is used to detect slurry information of the electrode piece 81.

[0026] Specifically, the slurry parameter detection member 6 detects slurry information of the first slurry coated on the electrode piece 81 through the first slit 71 to form a first slurry parameter, the first adjustment mechanism 4 adjusts the flow rate of the first slurry flowing through the first slit 71 by adjusting the position of the first adjustment member 42 based on the first slurry parameter, the slurry parameter detection member 6 further detects slurry information of the second slurry coated on the electrode piece 81 through the second slit 72 to form a second slurry parameter, and the second adjustment mechanism 5 adjusts the position of the second adjustment member 52 based on the second slurry parameter to adjust the flow rate of the second slurry flowing through the second slit 72.

[0027] The coating equipment of this embodiment is provided with a first adjustment mechanism 4 and a second adjustment mechanism 5, which can adjust the flow rate of the slurry flowing through the first slit 71 and the second slit 72. The slurry parameter detection member 6 detects the parameters of the coated slurry, compares the slurry parameters with preset values, and then feeds back the parameters to the first adjustment mechanism 4 and the second adjustment mechanism 5 to realize adjustment by the first adjustment member 42 and the second adjustment member 52, and realizes automatic adjustment of the coating by the two-layer die head, which greatly improves the effectiveness of debugging and further improves the coating efficiency.

[0028] The coating equipment according to this embodiment further includes a first gasket and a second gasket, where the first gasket is disposed between the upper mold 1 and the middle mold 2, and the first gasket defines a first slit 71 together with the upper mold 1 and the middle mold 2, and the second gasket is disposed between the middle mold 2 and the lower mold 3, and the second gasket defines a second slit 72 together with the middle mold 2 and the lower mold 3.

[0029] In this embodiment, the first slit 71 is provided horizontally, and the second slit 72 is provided inclined upward in the flow direction of the second slurry. For example, in this embodiment, the first slit 71 extends horizontally, and the second slit 72 is provided at an inclination angle of 30° with respect to the first slit 71. Of course, in other selectable embodiments, the inclination angle of the second slit 72 may be an angle such as 45° and 20°.

[0030] In the coating equipment according to this embodiment, the first adjustment mechanism 4 further includes a first driving plate 43, which is communicatively connected to the first driving member 41, which is communicatively connected to the slurry parameter detection member 6, and the first driving member 41 adjusts the position of the first adjustment member 42 extending into the first slit 71 by driving the first driving plate 43, thereby adjusting the flow rate of the first slurry in the first slit 71. Specifically, the first driving member 41 is one or more of a stepping motor, an ultrasonic motor, and a piezoelectric motor. In this embodiment, the first adjustment member 42 uses a T-shaped block. The T-shaped block includes a rod portion and a blocking portion of a rectangular block body, which is provided on the side close to the first slit 71, and when the blocking portion extends into the first slit 71, it can realize blocking of the first slurry being circulated, and further adjust the flow rate of the first slurry.

[0031] In the coating equipment of this embodiment, at the intersection position of the first slit 71 and the second slit 72, the upper mold 1 and the lower mold 3 together define a die lip suitable for the flow of slurry, the lower mold 3 includes a deformation portion 33 and a base 32, the deformation portion 33 is provided on the side closer to the die lip and the base 32 is provided on the side farther from the die lip, a second driving member 51 is attached to the base 32, and a second adjustment member 52 is connected to the deformation portion 33, and the second adjustment member 52 has a die lip adjustment state in which the second driving member 51 drives the deformation portion 33 to move closer to or away from the base 32, and in the die lip adjustment state, the lower lip of the lower mold 3 warps against the upper lip of the upper mold 1.

[0032] In the first embodiment of the present invention, the second driving member 51 is one or more of a stepping motor, an ultrasonic motor, and a piezoelectric motor. The second adjustment member is a connecting rod, one end of which is connected to the output end of the motor, and the other end of which is connected to the deformation part 33, so that the deformation of the deformation part is realized by driving the motor.

[0033] As the first embodiment of this embodiment, the second adjustment member 52 includes a push rod and a pull rod, and when in use, the push rod can push the deformation part to move away from the base, or the pull rod can pull the deformation part to move closer to the base. Specifically, when the push rod abuts against the side wall surface of the deformation part and the second driving member rotates the rigid screw, the push rod can push the deformation part to move, and the distance between the base 32 and the deformation part 33 can be adjusted, and the lower lip of the lower mold 3 can be slightly deformed. The pull rod is screwed into the deformation part, and when the pull rod is moved by the second driving member, the pull rod can pull the deformation part to move closer to the base.

[0034] In the coating equipment of this embodiment, the second adjustment mechanism 5 further includes a second drive plate, which is communicatively connected to the second drive member 51, which is communicatively connected to the slurry parameter detection member 6, and the second drive member 51 adjusts the relative position between the base 32 and the deformation portion 33 by driving the second drive plate, thereby adjusting the flow rate of the second slurry flowing out from the second slit 72.

[0035] In the coating equipment according to this embodiment, the middle mold 2 includes a first supply port 21, one end of which is suitable for connecting to a first supply system and the other end of which communicates with a first slit 71, and the lower mold 3 includes a second supply port 31, one end of which is suitable for connecting to a second supply system and the other end of which communicates with a second slit 72. The second supply port 31 is provided on the bottom surface of the lower mold 3, and the second supply port 31 provided in this structure requires a relatively small amount of cutting for the lower mold 3, resulting in a short production cycle and a simple production process.

[0036] Of course, in another optional embodiment, the second supply port 31 may be provided on the rear side of the lower mold 3 .

[0037] In the coating equipment according to this embodiment, the slurry parameter detection member 6 uses a thickness detection member, the thickness detection member detects the slurry thickness of the electrode piece 81, the thickness detection member is a thickness detector, specifically, an α-ray or β-ray type NDC measurement probe can be selected, the mass of the unit area can be measured, and the coating thickness can be obtained; in another embodiment of this embodiment, the slurry parameter detection member 6 can also use an areal density detection member, the areal density detection member detects the slurry areal density of the electrode piece 81, and the areal density detection member can be a density meter. Of course, the thickness detection member and the areal density detection member can be used together.

[0038] The coating equipment according to the present embodiment further includes a bus base, the bus base is provided on both ends of the adjustment mechanism, and the bus base is communicatively connected to the driving plate, the blades on both ends of the driving plate are inserted into the bus base, and the bus base is provided to supply power to the adjustment mechanism and realize communication between the multiple driving plates and the multiple adjustment mechanisms.

[0039] 6, the coating equipment according to this embodiment further includes a dispensing mechanism, which includes a dispensing valve 91 provided in the upper mold 1 and a first dispensing passage 92 provided in the upper mold. The first dispensing passage 92 communicates with the dispensing valve 91, and the first dispensing passage 92 communicates with the gel flow path of the first gasket, thereby realizing dispensing of the upper layer.

[0040] In another optional embodiment, a communication hole may be further provided in the first gasket to fulfill the dispensing of the lower layer by the dispensing mechanism together with the dispensing of the upper layer, and the dispensing mechanism further includes a second dispensing passage 93 provided in the middle mold 2, the second dispensing passage being connected to the first dispensing passage 92 via the communication hole, and the side of the second dispensing passage 93 away from the first gasket being connected to the gel flow path of the second gasket, thereby further realizing the dispensing of the lower layer.

[0041] In other optional embodiments, the installation positions of the first adjustment mechanism and the second adjustment mechanism can be changed; for example, the first adjustment mechanism may be installed in a medium-sized machine, and the second adjustment mechanism may also be installed in a medium-sized machine, and the first adjustment mechanism only needs to be able to change the flow rate of the first slurry in the first slit, and the second adjustment mechanism only needs to be able to change the flow rate of the second slurry in the second slit. Example 2

[0042] This embodiment provides a coating method, as shown in FIG. 7, which includes the following steps: S11: The electrode piece 81 is coated with the second slurry. First, the control valve on the second supply port 31 side is opened, and the control valve on the first supply port 21 side is closed, and the coating layer 82 below the electrode piece 81 is coated. S12: The slurry parameter detection member 6 detects the second slurry parameter of the electrode piece 81 to form a first detection result. Based on the detection data fed back by the thickness detection member or the areal density detection member, a second slurry parameter coated on the electrode piece 81 is obtained, and the second slurry parameter is compared with a preset process requirement to obtain a first detection result, where the second slurry parameter may be an actual film thickness detected by the thickness detection member, or may be an areal density parameter of the second slurry detected by the areal density detection member. S13: The position of the second adjusting member 52 is controlled based on the first detection result to adjust the second slurry parameter of the electrode piece 81. The second driving member 51 is controlled via the second driving plate to drive and move the second adjustment member 52, thereby changing the relative position between the base 32 and the deformation portion 33 of the lower mold 3 and finely deforming the lower lip relative to the upper lip, thereby adjusting the flow rate of the second slurry flowing out from the second slit 72, and further changing the areal density of the second slurry coated on the electrode piece 81 and the film thickness of the lower coating layer 82, thereby adjusting the second slurry parameters. S21: Coating the electrode piece 81 with the second slurry is stopped, and the electrode piece 81 is coated with the first slurry. If the second slurry parameters meet the preset process requirements, then the control valve on the second supply port 31 side is closed and the control valve on the first supply port 21 side is opened to coat the electrode piece 81 with the upper coating layer 83 . S22: The slurry parameter detection member 6 detects the first slurry parameter of the electrode piece 81 to form a second detection result. Based on the detection data fed back by the thickness detection member or the areal density detection member, a first slurry parameter coated on the electrode piece 81 is obtained, and the first slurry parameter is compared with the preset process requirements to obtain a second detection result, in which the first slurry parameter may be the sum of the film thickness of the lower coating layer 82 detected by the thickness detection member and the film thickness of the upper coating layer 83 detected by the thickness detection member, or may be the actual areal density parameter of the first slurry coated on the substrate detected by the areal density detection member. S23: The position of the first adjustment member 42 is controlled based on the second detection result to adjust the first slurry parameter of the electrode piece 81. By controlling the first driving member 41 via the first driving plate 43 to adjust the position of the first adjustment member 42 extending into the first slit 71 and further adjusting the flow rate of the first slurry in the first slit 71, the surface density of the first slurry coated on the electrode piece 81 and the film thickness of the underlying coating layer 82 can be changed, and the first slurry parameters can be adjusted. S31: Coating the electrode piece 81 with the first slurry is intermittently stopped. During continuous coating, the control valve on the side of the first supply port 21 is periodically and intermittently closed. S32: Detect a second slurry parameter of the electrode piece 81 to form a third detection result. Example 3

[0043] This embodiment provides a coating method, the specific coating method being the coating method provided in embodiment 2, using the coating equipment provided in embodiment 1.

[0044] Obviously, the above examples are merely illustrative and are not intended to limit the embodiments. Those skilled in the art can make various other changes or modifications based on the above description. It is not necessary and impossible to list all the embodiments here. Any obvious changes or modifications derived therefrom are still within the scope of protection of the present application. [Explanation of symbols]

[0045] 1 Upper mold 2 medium size 21 1st supply port 3 Lower mold 31 2nd supply port 32 Base 33 Transformation section 4 First adjustment mechanism 41 First driving member 42 First adjustment member 43 First driving plate 5 Second adjustment mechanism 51 Second driving member 52 Second adjustment member 6 Slurry parameter detection member 71 First Slit 72 Second Slit 81 Electrode piece 82 Lower coating layer 83 Upper coating layer 91 Dispense valve 92 Dispensing Passage No. 1 93 Dispense Passage No. 2

Claims

1. A coating apparatus comprising a coating die head and a slurry parameter sensing member; The coating die head comprises: a first slit and a second slit, the first slit being suitable for the passage of a first slurry and the second slit being suitable for the passage of a second slurry, the first slit and the second slit being provided at an angle; a first adjustment mechanism including a first driving member and a first adjustment member, the first driving member having a driving end connected to the first adjustment member; a second adjustment mechanism including a second driving member and a second adjustment member, the second driving member having a driving end connected to the second adjustment member; a slurry parameter detection member that is communicatively connected to the first adjustment mechanism and the second adjustment mechanism and detects slurry information of the electrode piece; the slurry parameter detection member detects slurry information of the first slurry coated on the electrode piece through the first slit to form a first slurry parameter, and the first adjustment mechanism adjusts a position of the first adjustment member based on the first slurry parameter to adjust a flow rate of the first slurry flowing through the first slit; and / or The slurry parameter detection member detects slurry information of the second slurry coated on the electrode piece through the second slit to form a second slurry parameter, and the second adjustment mechanism adjusts a position of the second adjustment member based on the second slurry parameter to adjust a flow rate of the second slurry flowing through the second slit.

2. further comprising an upper mold, a middle mold, and a lower mold, the upper mold and the middle mold defining the first slit, the lower mold and the middle mold defining the second slit; 2. The coating equipment according to claim 1, wherein the first adjustment mechanism is provided on the upper die and / or the middle die, and the second adjustment mechanism is provided on the lower die and / or the middle die.

3. further comprising a first gasket and a second gasket; The first gasket is provided between the upper mold and the middle mold and defines the first slit together with the upper mold and the middle mold; 3. The coating apparatus according to claim 2, wherein the second gasket is provided between the middle mold and the lower mold, and defines the second slit together with the middle mold and the lower mold.

4. At an intersection of the first slit and the second slit, the upper die and the lower die together define a die lip suitable for allowing a slurry to flow out; The lower die includes a deformation portion and a base portion, the deformation portion being provided on a side closer to the die lip and the base being provided on a side farther from the die lip, 4. The coating equipment according to claim 2 or 3, characterized in that the second driving member is attached to the base, the second adjustment member is connected to the deformation portion, and the second adjustment member has a die lip adjustment state that drives the deformation portion to approach or move away from the base under the action of the second driving member, and in the die lip adjustment state, the lower lip of the lower mold is warped relative to the upper lip of the upper mold.

5. The intermediate mold includes a first supply port, one end of the first supply port is adapted to be connected to a first supply system, and the other end of the first supply port is in communication with the first slit; The coating apparatus according to claim 2 or 3, characterized in that the lower mold includes a second supply port, one end of the second supply port being suitable for connection to a second supply system, and the other end of the second supply port being in communication with the second slit.

6. The slurry parameter detection member is a thickness detection member, and the thickness detection member detects the slurry thickness of the electrode piece; and / or 4. The coating equipment according to claim 1, wherein the slurry parameter detection member is an areal density detection member, and the areal density detection member detects the slurry areal density of the electrode piece.

7. Any of the adjustment mechanisms further includes a drive plate, the drive plate being communicatively connected to the drive member, the drive plate being communicatively connected to the slurry parameter detection member, 7. The coating device according to claim 6, wherein the driving member drives and moves an adjustment member by driving the driving plate to adjust the flow rate of the slurry in the slit.

8. 8. The coating apparatus of claim 7, further comprising a bus base provided on at least one side of the adjustment mechanism, the bus base being communicatively connected to the drive plate.

9. a dispense mechanism including a dispense valve and a first dispense passage, the dispense valve being attached to the upper mold, the first dispense passage being provided in the upper mold, the first dispense passage being in communication with the first slit and the dispense valve; 2. The coating apparatus of claim 1, wherein the dispensing mechanism further includes a second dispensing passage, the second dispensing passage being disposed in the middle mold, and the second dispensing passage communicating with the first slit and the second slit.

10. 1. A coating method comprising the steps of: Coating the electrode strip with a second slurry; a slurry parameter detection member detecting a second slurry parameter of the electrode piece to form a first detection result; adjusting a second slurry parameter of the electrode piece by controlling a position of the second adjusting member based on the first detection result; ceasing to coat the electrode strips with the second slurry and coating the electrode strips with the first slurry; a slurry parameter detection member detecting a first slurry parameter of the electrode piece to form a second detection result; and controlling a position of a first adjusting member based on the second detection result to adjust a first slurry parameter of the electrode piece.

11. intermittently stopping the coating of the electrode strip with the first slurry; The method of claim 10, further comprising: sensing a second slurry parameter of the electrode strip to form a third sensing result.

12. The coating method according to claim 10 or 11, characterized in that the coating device according to any one of claims 1 to 9 is used.

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