Depth-controllable scraping device for pole piece coating

Abstract

The utility model discloses a scraping device with controllable pole piece coating depth, which belongs to the technical field of pole piece coating scraping and comprises a scraper. The cambered surface supporting structure is used for supporting the pole piece in the coating scraping layer; the pole piece fixing structure is used for enabling at least one part of the pole piece to be tightly attached to the cambered surface of the supporting structure; the depth driving mechanism is used for driving the scraper to move in the depth direction of the pole piece coating; the distance measurement sensing mechanism is used for detecting the distance between the blade point of the scraper and the original surface of the pole piece coating; and the scraping driving mechanism is used for driving the scraper to do planar motion on the surface of the pole piece and / or driving the surface of the pole piece to do rotary motion relative to the blade point of the scraper, and coating scraping and scraping position change are achieved through the relative motion of the scraper and the pole piece. According to the scheme, the coating is subjected to layered scraping treatment, and the limitation of coating treatment on coating detection is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of scraping pole piece coating, specifically relates to a pole piece coating depth controllable scraping device. BACKGROUND

[0002] In order to improve the manufacturing rate and consistency of pole piece, the pole piece manufacturing process is to use the tape running mode to coat slurry on foil, and then to be baked and rolled. Due to the increase of tape running rate, the solvent volatilization rate in slurry is accelerated, the binder mixed in the solvent floats and deposits, which directly affects the consistency of pole piece coating in the thickness direction, indirectly affects the consistency of the battery, causes the uneven lithium insertion of the battery, the uneven distribution of current density in the thickness direction, the different capacity attenuation degree, and increases the safety risk of pole piece electrical performance. After the production of pole piece is completed, the surface coating needs to be detected in the thickness direction.

[0003] The patent with publication number CN106840085A discloses a kind of pole piece coating thickness online monitoring system, which uses beta ray to pass through pole piece coating in the thickness direction, then collects the relevant data of beta ray emission and reception and calculates, obtains pole piece coating thickness. The detection is only used to measure coating thickness. Due to the limitation of pole piece coating treatment, the uneven distribution of pole piece coating composition in the thickness direction cannot be detected. UTILITY MODEL CONTENT

[0004] The utility model provides a kind of pole piece coating depth controllable scraping device to solve the problem of coating detection limited by current coating treatment.

[0005] To solve the above technical problems, the technical scheme of the utility model is as follows: a kind of pole piece coating depth controllable scraping device, including scraper;

[0006] Cambered surface support structure is used to improve the support of the pole piece in the coating scraping process;

[0007] Pole piece fixing structure is used to tightly attach at least a part of the pole piece to the cambered surface of the support structure;

[0008] Depth driving mechanism is used to drive the movement of scraper along the depth direction of pole piece coating;

[0009] Distance measuring sensing mechanism is used to detect the distance between the blade edge of scraper and the original surface of pole piece coating;

[0010] And scraping driving mechanism is used to drive the planar movement of scraper on the surface of pole piece, and / or drive the rotational movement of the surface of pole piece relative to the blade edge of scraper, realize coating scraping and scraping position change through the relative movement of scraper and pole piece;

[0011] After scraping a deep coating, the scraping knife and / or the pole piece are reset, the scraping knife is driven into a deeper coating, another deep coating is scraped at the same position, and multiple reciprocations are implemented to achieve layered material taking.

[0012] Specifically, the pole piece fixing structure is divided into face fixing or end fixing, the face fixing is that the pole piece is tightly attached to the arc surface of the support structure by bonding or vacuum adsorption, and the end fixing is that the free end of the pole piece is fixed by the tensioning mechanism, and a part of the pole piece is further attached to the arc surface of the support structure by tension.

[0013] Specifically, the pole piece is partially sleeved on the arc surface of the support structure, and a free end is extended from each of the upper and lower ends of the arc surface;

[0014] The tensioning mechanism includes a traction rail, a pole piece end fixing member arranged on the traction rail, and a tensioning drive for driving the pole piece end fixing member to move along the traction rail, and the two free ends are fixed by the pole piece end fixing member, and as the pole piece end fixing member moves away from the support structure along the traction rail, the pole piece is tensioned and tightly attached to the arc surface.

[0015] Specifically, the pole piece is partially sleeved on the arc surface of the support structure, and a free end is extended from each of the upper and lower ends of the arc surface;

[0016] The tensioning mechanism includes a body, a first holder arranged on the body, and a second holder arranged on the body, and one free end of the pole piece is fixed on the first holder, and after passing around the support mechanism, the other free end is fixed on the second holder after being tensioned.

[0017] Specifically, the support structure is a fixed roller or a rotating roller, when the support structure is a fixed roller, the scraping drive mechanism drives the scraping knife to move or the scraping mechanism drives the pole piece to slide on the surface of the fixed roller, thereby realizing coating scraping; when the support structure is a rotating roller, the pole piece is fixed relative to the rotating roller, and the scraping mechanism drives the rotating roller to rotate, thereby realizing coating scraping.

[0018] Specifically, in a space rectangular coordinate system, the direction in which the scraping knife cuts into the pole piece coating is the X-axis, and the direction in which the roller shaft extends is the Y-axis direction;

[0019] When the scraping knife is driven to move in the plane of the pole piece surface, the scraping knife face is perpendicular to the XOY coordinate plane, and the cutting edge is an arc line consistent with the arc of the arc surface, the scraping drive mechanism drives the scraping knife to move linearly along the Y-axis direction, thereby realizing coating scraping.

[0020] Specifically, in a space rectangular coordinate system, the direction in which the scraping knife cuts into the pole piece coating is the X-axis, and the direction in which the roller shaft extends is the Y-axis direction;

[0021] When the surface of the driving pole piece rotates relative to the rotating motion of the scraper blade, the scraping driving mechanism drives one end of the pole piece to move linearly in the positive direction of the X axis, and the other end of the pole piece moves linearly in the negative direction of the X axis by the same distance, so that the coating is scraped.

[0022] The scraping driving mechanism comprises a first X-direction linear rail, a first pole piece end fixing member arranged on the first X-direction linear rail, a first tension driving member for driving the first pole piece end fixing member to move along the first X-direction linear rail, a second X-direction linear rail, a second pole piece end fixing member arranged on the second X-direction linear rail, and a second tension driving member for driving the second pole piece end fixing member to move along the second X-direction linear rail; after the pole piece passes around the roller surface, one end of the pole piece is fixed by the first pole piece end fixing member, and the other end of the pole piece is fixed by the second pole piece end fixing member.

[0023] Specifically, when the surface of the driving pole piece rotates relative to the rotating motion of the scraper blade, the pole piece is fixed relative to the roller surface, and the scraping driving mechanism is a rotary motor for directly driving or indirectly driving the roller to rotate through a transmission structure.

[0024] The transmission structure is a transmission roller, and after the pole piece passes around the rotating roller surface, the pole piece passes around the transmission roller surface; with the operation of the rotary motor, the pole piece rotates synchronously with the rotating roller and drives the rotating roller to rotate.

[0025] After the pole piece passes around the rotating roller surface and the transmission roller surface, the two ends of the pole piece are fixed on the transmission roller surface.

[0026] Specifically, the coating collecting structure comprises a collecting box, a Y-direction linear rail, and a collecting box driving member for driving the collecting box to move along the Y-direction linear rail, and the collecting box comprises one or more material bins arranged in the Y-axis direction, and each material bin is used for collecting the coating powder scraped by the scraper in one time.

[0027] Compared with the prior art, the technical scheme provided by the utility model has the following advantages:

[0028] 1. The coating is layered and scraped in the thickness direction, the state of the coating scraped to different depths is obtained, and the coating samples of different depth layers are obtained; the coating scraped to different depths is detected to know the distribution of the composition in the thickness direction of the pole piece coating, and further guide the adjustment of the coating preparation and the construction process.

[0029] 2. The pole piece is supported by the arc surface, the pole piece is highly attached to the arc surface, the pole piece coating is uniformly supported, the depth of the scraper blade is consistent during scraping, the coating powder automatically slides down, is beneficial to collection and does not interfere with the movement of the scraper. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is the overall structure diagram of the pole piece coating depth controllable scraping device in the embodiment one of the utility model;

[0031] Figure 2 is the first fixed roller structure diagram in the embodiment two of the utility model;

[0032] Figure 3 is the overall structure diagram of the pole piece coating depth controllable scraping device in the embodiment three of the utility model;

[0033] Figure 4 is the structure diagram of the scraping drive mechanism in the embodiment three of the utility model;

[0034] Figure 5 is the overall structure diagram of the pole piece coating depth controllable scraping device in the embodiment four of the utility model;

[0035] Figure 6 is the structure diagram of the depth drive mechanism in the embodiment one to four of the utility model;

[0036] Figure 7 is the structure diagram of the aggregate box structure in the embodiment one to four of the utility model;

[0037] Figure 8 is the structure diagram of the transposition drive structure in the embodiment three and four of the utility model.

[0038] In the drawing: 10, base; 20, scraper; 21, clamp; 22, X direction guide rail; 23, first differential head; 24, second Y direction guide rail; 25, second sliding seat; 26, second differential head; 27, sliding block; 30, pole piece; 40, contact type displacement sensor; 41, detection end; 50, aggregate box; 51, Y direction linear rail; 60, first fixed roller; 61, first fixed roller support; 62, second fixed roller; 63, second fixed roller support; 64, rotating roller, 65, rotating roller support; 70, first Y direction guide rail; 71, first sliding seat; 72, first drive motor; 73, first ball screw structure; 80, body; 81, holder; 82, first clamping piece; 83, second clamping piece; 90, first pole piece end fixing piece; 91, second pole piece end fixing piece; 92, first X direction linear rail; 93, second X direction linear rail; 94, first tension drive; 95, second tension drive; 96, force value sensor; 97, transmission roller; 98, rotary motor. DETAILED DESCRIPTION

[0039] In order to facilitate understanding, the pole piece coating depth controllable scraping device is described below in conjunction with embodiments, and it should be understood that these embodiments are only used for illustrating the utility model and are not used for limiting the scope of the utility model.

[0040] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation and positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0041] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0042] Example 1

[0043] like Figure 1 As shown, the electrode coating depth controllable scraping device in this embodiment includes a base 10, a scraper 20, a support structure, an electrode fixing structure, a depth driving mechanism, a distance sensing mechanism, a scraping driving mechanism, and a displacement driving structure.

[0044] The supporting structure is a first fixed roller 60, which is a complete roller body fixed on the base 10 by a first fixed roller bracket 61. In a spatial rectangular coordinate system, the direction in which the scraper 20 cuts into the electrode coating is taken as the X-axis, and the direction of the roller shaft extension is taken as the Y-axis; the scraper 20, the first fixed roller 60, and the electrode fixing structure are arranged sequentially in the X-axis direction. The blade surface of the scraper 20 is perpendicular to the XOY coordinate plane, and the blade edge is an arc consistent with the curvature of the roller surface.

[0045] The electrode fixing structure adopts end fixing. End fixing is achieved by fixing the free end of the electrode through a tensioning mechanism and further by using tension to make a part of the electrode adhere to the roller surface of the first fixed roller 60. The electrode 30 extends a free end from the upper and lower ends of the roller surface.

[0046] The tensioning mechanism includes a body 80 fixed on the base 10 and a clamp 81 disposed on the body 80. One free end of the electrode 30 passes over the roller surface and merges with the other free end. After tensioning, the two free ends are fixed on the clamp 81.

[0047] It should be noted that the pole piece fixing structure here can also be surface fixed. Surface fixing is to tightly attach the pole piece to the roller surface of the first fixing roller 60 by bonding or vacuum adsorption.

[0048] The scraping drive mechanism includes a first Y-direction guide rail 70, a first sliding seat 71, a first drive motor 72, and a first ball screw structure 73. The first drive motor 72 drives the first ball screw structure 73 to move, thereby driving the first sliding seat 71 to reciprocate in the first Y-direction guide rail 70. The scraper 20 is installed on the first sliding seat 71 and moves synchronously with the first sliding seat 71. That is, the first drive motor 72 drives the scraper 20 to move on the surface of the pole piece 30 in the plane, thereby achieving scraping of the coating.

[0049] Embodiment Two

[0050] As shown in Figure 2 , the difference between this embodiment and Embodiment One is that the first fixing roller 60 is an incomplete roller body.

[0051] Embodiment Three

[0052] As shown in Figure 3 and Figure 4 , the pole piece coating depth controllable scraping device in this embodiment includes a base 10, a scraper 20, a support structure, a pole piece fixing structure, a depth drive mechanism, a distance measuring sensing mechanism, a scraping drive mechanism, and a transposition drive structure. In this embodiment, the function of the scraping drive mechanism can be realized by the pole piece fixing structure, that is, the two are combined into one.

[0053] The support structure is a second fixing roller 62, which is a complete roller body fixed and erected on the base 10 by a second fixing roller support 62. In the spatial rectangular coordinate system, the direction in which the scraper 20 cuts into the pole piece coating is the X-axis, and the direction in which the roller shaft extends is the Y-axis direction. The scraper 20, the second fixing roller 62, and the pole piece fixing structure are arranged in sequence in the X-axis direction. The scraper 20 blade surface is parallel to the XOY coordinate plane, and the blade edge is a straight line parallel to the Y-axis.

[0054] The electrode fixing structure includes a first X-axis linear rail 92, a first electrode end fixing member 90, a first tension drive 94, a second X-axis linear rail 93, a second electrode end fixing member 91, a second tension drive 95, and a force sensor 96. After passing over the second fixing roller 62, one end of the electrode 30 is fixed by the first electrode end fixing member 90, and the other end is fixed by the second electrode end fixing member 91. The first electrode end fixing member 90 is disposed on the first X-axis linear rail 92, and the second electrode end fixing member 91 is disposed on the second X-axis linear rail 93. The first tension drive 94 and the second tension drive 95 have the same structure. The first tension drive 94 includes a rotary motor and a ball screw. The rotary motor drives the ball screw to move, thereby moving the first electrode end fixing member 90 on the first X-axis linear rail 92. Similarly, the second tension drive 95 drives the second electrode end fixing member 91 to move on the second X-axis linear rail 93.

[0055] When the movement path of the first electrode end fixing member 90 on the first X-axis linear rail 92 and the movement path of the second electrode end fixing member 91 on the second X-axis linear rail 93 are equal, and the movement direction of the first electrode end fixing member 90 on the first X-axis linear rail 92 is opposite to that of the second electrode end fixing member 91 on the second X-axis linear rail 93, the electrode 30 slides on the surface of the second fixed roller 62, thereby achieving coating scraping. In other words, the function of the scraping drive mechanism is realized through the electrode fixing structure.

[0056] When the movement path of the first electrode end fixing member 90 on the first X-direction linear rail 92 and the movement path of the second electrode end fixing member 91 on the second X-direction linear rail 93 are not equal, or when the movement direction of the first electrode end fixing member 90 on the first X-direction linear rail 92 is the same as the movement direction of the second electrode end fixing member 91 on the second X-direction linear rail 93, the tension applied to the electrode 70 by the electrode fixing structure is adjusted, and the force sensor 96 monitors and provides feedback on the tension applied by the electrode fixing structure, so that the electrode 30 is tightened and tightly attached to the arc surface.

[0057] Example 4

[0058] like Figure 5 As shown, the electrode coating depth controllable scraping device in this embodiment includes a base 10, a scraper 20, a support structure, an electrode fixing structure, a depth driving mechanism, a distance sensing mechanism, a scraping driving mechanism, and a displacement driving structure.

[0059] The support structure is a rotating roller 64, which is a complete roller body erected on the base 10 through a rotating roller support 65, and rotates relative to the rotating roller support 65 along the roller axis direction. In a spatial rectangular coordinate system, the direction in which the doctor blade 20 cuts into the coating of the pole piece is the X-axis, and the direction in which the roller axis extends is the Y-axis direction; the doctor blade 20, the rotating roller 64 and the pole piece fixing structure are sequentially arranged in the X-axis direction. The doctor blade 20 is parallel to the XOY coordinate plane, and the cutting edge is a straight line parallel to the Y-axis.

[0060] The pole piece fixing structure adopts end fixing, which is to fix the free end of the pole piece 30 through a tensioning mechanism and further make a part of the pole piece 30 adhere to the surface of the rotating roller 64 through tension.

[0061] The tensioning mechanism includes a first clamping piece 82 and a second clamping piece 83, and the tension applied by the tensioning structure to the pole piece is realized by adjusting the distance between the first clamping piece 82 and the second clamping piece 83 or directly adjusting the pole piece clamping position.

[0062] The first clamping piece 82 and the second clamping piece 83 can be directly arranged on the rotating roller 64, that is, the pole piece is fixed around the rotating roller 64, and at this time, the doctoring driving mechanism drives the rotating roller 64 to rotate, so that the pole piece rotates relative to the doctor blade 20, and the coating scraping is completed.

[0063] In the embodiment, the first clamping piece 82 and the second clamping piece 83 are arranged on a transmission roller 97, and the specific mode is that after the pole piece 30 passes through the surface of the rotating roller 64, one end thereof winds around the surface of the transmission roller 97 in the clockwise direction, is fixed on the surface by the first clamping piece 82, and the other end thereof winds around the surface of the transmission roller 97 in the counterclockwise direction, and is fixed on the surface by the second clamping piece 83. At this time, the doctoring driving mechanism drives the transmission roller 97 to rotate, the pole piece 30 rotates synchronously with the rotating roller 64 and pulls the rotating roller 64 to rotate. The doctoring driving mechanism adopts a rotary motor 98.

[0064] It should be pointed out that the rotating roller 64 here can also be fixed and not rotating, that is, the pole piece 30 is driven by the transmission roller 97 to slide relative to the surface of the rotating roller 64, and the movement of the pole piece 30 relative to the doctor blade 20 can also be realized, and the coating scraping is completed.

[0065] As shown in FIG. 1, Figure 6 In the above embodiment one to embodiment four, the depth driving mechanism is a first manual displacement platform, and the manual displacement platform includes an X-direction guide rail 22 and a first micro displacement head 23, and the first micro displacement head 23 is held to push the clamp 21 to reciprocate along the X-direction guide rail 22.

[0066] Continuing as shown in FIG. 1, Figure 6As shown, the distance measuring sensing structure is a visual camera (not shown in the figure) and a contact displacement sensor 40. The visual camera is installed directly above the doctor blade 20 and moves synchronously with the doctor blade 20. The detection end 41 of the contact displacement sensor 40 faces the roll surface, and the non-detection end 41 faces away from the roll surface and is fixed by the clamp 21. The front edge of the detection end 41 is located at the same position as the blade edge of the doctor blade 20 on the X-axis.

[0067] As shown in FIG. 1, the doctor blade 20 is installed on the first hand displacement platform, and the first hand displacement platform is installed on the first sliding seat 71. The first sliding seat 71 is slidably connected to the first Y-direction guide rail 72. The first hand displacement platform is driven by the first hand displacement platform driving mechanism to move along the first Y-direction guide rail 72. Figure 7 As shown in FIG. 1, the doctor blade 20 is installed on the first hand displacement platform, and the first hand displacement platform is installed on the first sliding seat 71. The first sliding seat 71 is slidably connected to the first Y-direction guide rail 72. The first hand displacement platform is driven by the first hand displacement platform driving mechanism to move along the first Y-direction guide rail 72.

[0068] As shown in FIG. 1, the doctor blade 20 is installed on the first hand displacement platform, and the first hand displacement platform is installed on the first sliding seat 71. The first sliding seat 71 is slidably connected to the first Y-direction guide rail 72. The first hand displacement platform is driven by the first hand displacement platform driving mechanism to move along the first Y-direction guide rail 72. Figure 8 As shown in FIG. 1, the doctor blade 20 is installed on the first hand displacement platform, and the first hand displacement platform is installed on the first sliding seat 71. The first sliding seat 71 is slidably connected to the first Y-direction guide rail 72. The first hand displacement platform is driven by the first hand displacement platform driving mechanism to move along the first Y-direction guide rail 72.

[0069] As shown in FIG. 1, the doctor blade 20 is installed on the first hand displacement platform, and the first hand displacement platform is installed on the first sliding seat 71. The first sliding seat 71 is slidably connected to the first Y-direction guide rail 72. The first hand displacement platform is driven by the first hand displacement platform driving mechanism to move along the first Y-direction guide rail 72. Figure 1 As shown in FIG. 1, the doctor blade 20 is installed on the first hand displacement platform, and the first hand displacement platform is installed on the first sliding seat 71. The first sliding seat 71 is slidably connected to the first Y-direction guide rail 72. The first hand displacement platform is driven by the first hand displacement platform driving mechanism to move along the first Y-direction guide rail 72.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or replace some or all of the technical features with equivalent replacements, without departing from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A device for controlling the depth of electrode coating scraping, characterized in that, Including scrapers; An arc-shaped support structure is used to improve support for the electrode sheet in the coating layer; An electrode fixing structure is used to ensure that at least a portion of the electrode is tightly attached to the arc surface of the support structure; The depth drive mechanism is used to drive the scraper to move along the depth direction of the electrode coating; The ranging sensing mechanism is used to detect the distance between the scraper blade and the original surface of the electrode coating; And a scraping drive mechanism, used to drive the scraper to move in a plane on the electrode surface, and / or drive the electrode surface to rotate relative to the scraper blade, so as to achieve coating scraping and change of scraping position through the relative movement of the scraper and the electrode. After scraping off a layer of coating, the scraper and / or electrode are reset, and the scraper is driven to enter a deeper layer of coating. Another layer of coating is scraped off at the same position. This process is repeated multiple times to achieve layered material removal.

2. The electrode coating depth controllable scraping device as described in claim 1, characterized in that, Electrode fixing structures are divided into surface fixing and end fixing. Surface fixing is achieved by bonding or vacuum adsorption to make the electrode tightly attached to the arc surface of the support structure. End fixing is achieved by a tensioning mechanism to fix the free end of the electrode and further by tension to make a part of the electrode attached to the arc surface of the support structure.

3. The electrode coating depth controllable scraping device as described in claim 2, characterized in that, A portion of the electrode is fitted onto the arc surface of the support structure, with a free end extending from the upper and lower ends of the arc surface; The tensioning mechanism includes a traction rail, an electrode end fixing member disposed on the traction rail, and a tensioning drive that drives the electrode end fixing member to move along the traction rail. The two free ends are fixed by the electrode end fixing member. As the electrode end fixing member moves away from the support structure along the traction rail, the electrode is tensioned and tightly attached to the arc surface.

4. The electrode coating depth controllable scraping device as described in claim 2, characterized in that, A portion of the electrode is fitted onto the arc surface of the support structure, with a free end extending from the upper and lower ends of the arc surface; The tensioning mechanism includes a body, a first clamp on the body, and a second clamp on the body. One free end of the electrode is fixed to the first clamp, and after passing around the support mechanism, the other free end is tensioned and fixed to the second clamp.

5. The electrode coating depth controllable scraping device as described in claim 1, characterized in that, The support structure is a fixed roller or a rotating roller. When the support structure is a fixed roller, the scraping drive mechanism drives the scraper to move or the scraping mechanism drives the electrode to slide on the surface of the fixed roller, thereby achieving coating scraping. When the support structure is a rotating roller, the electrode is fixed relative to the rotating roller, and the scraping mechanism drives the rotating roller to rotate, thereby achieving coating scraping.

6. The electrode coating depth controllable scraping device as described in claim 5, characterized in that, In a spatial rectangular coordinate system, the direction in which the scraper cuts into the electrode coating is taken as the X-axis, and the direction of the roller extension is taken as the Y-axis. When the scraper moves in a plane on the electrode surface, the scraper blade is perpendicular to the XOY coordinate plane, and the blade edge is an arc that matches the curvature of the arc surface. The scraping drive mechanism drives the scraper to move linearly along the Y-axis to scrape off the coating.

7. The electrode coating depth controllable scraping device as described in claim 5, characterized in that, In a spatial rectangular coordinate system, the direction in which the scraper cuts into the electrode coating is taken as the X-axis, and the direction of the roller extension is taken as the Y-axis. When the surface of the drive electrode rotates relative to the blade edge, the scraping drive mechanism drives one end of the electrode to move linearly along the positive X-axis, and the other end of the electrode to move linearly in the opposite X-axis for the same distance, thereby scraping off the coating.

8. The electrode coating depth controllable scraping device as described in claim 5, characterized in that, When the surface of the drive electrode rotates relative to the blade edge, the electrode is fixed relative to the roller surface. The scraping drive mechanism is a rotary motor that directly drives the roller or indirectly drives the roller rotation through a transmission structure.

9. The electrode coating depth controllable scraping device as described in claim 1, characterized in that, It also includes a coating collection structure, which includes a collection box, a Y-axis linear rail, and a collection box drive that drives the collection box to move along the Y-axis linear rail. The collection box includes one or more hoppers arranged along the Y-axis, and each hopper is used to collect coating powder scraped by the scraper in a single pass.

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