Scraping device for pole piece coating and layered scraping method for pole piece coating

Abstract

A scraping device for a pole piece (70) coating and a layered scraping method for the pole piece (70) coating, the scraping device comprises a roller (80), a scraper (20) located on one side of the surface of the roller (80), a tensioning structure located on the other side of the surface of the roller (80), a force value sensor, a feed driving structure, a distance measurement sensing structure and a scraping driving structure, after the pole piece (70) bypasses the surface of the roller (80), the tensioning structure fixes the end portion of the pole piece (70) and applies a pulling force to the pole piece (70), and the scraping driving structure is driven by the scraper (20) to scrape the pole piece (70). The force value sensor is used for monitoring and feeding back tension applied by the tensioning structure; the cutter feeding driving structure drives the blade point of the scraper (20) to go deep into the coating of the pole piece (70), the distance measurement sensing structure is used for detecting the distance between the scraper (20) and the coating of the pole piece (70), and the scraping driving structure is used for driving the scraper (20) and the pole piece (70) to relatively rotate by taking the shaft of the roller (80) as the center, so that the coating is scraped.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of coating scraping of pole piece, and particularly relates to a coating scraping device of pole piece and a coating layering scraping method of pole piece. BACKGROUND

[0002] To improve the manufacturing rate and consistency of the pole piece, the pole piece manufacturing process is to coat the slurry on the foil by using the tape running mode, and then to be baked and rolled. Due to the increase of the tape running rate, the solvent in the slurry volatilizes quickly, and the binder mixed therein floats and deposits with the solvent, which directly affects the consistency of the pole piece coating in the thickness direction, and indirectly affects the consistency of the battery, resulting in uneven lithium insertion of the battery, uneven distribution of the current density in the thickness direction, and different capacity attenuation degrees, and increasing the safety risk of the pole piece electrical performance. After the pole piece production is completed, the surface coating thereof needs to be detected in the thickness direction.

[0003] Patent No. CN106840085A discloses a kind of pole piece coating thickness online monitoring system, which utilizes beta ray to pass through the pole piece coating in the thickness direction, and then collects the relevant data of beta ray emission and reception and calculates to obtain the pole piece coating thickness. The detection is only used for measuring the coating thickness. Due to the limitation of the pole piece coating treatment, the uneven distribution of the pole piece coating composition in the thickness direction cannot be detected. SUMMARY

[0004] The application provides a kind of pole piece coating scraping device and pole piece coating layering scraping method to solve the problem of coating detection limitation by current coating treatment.

[0005] To solve the above technical problems, the technical scheme of the application is:

[0006] A kind of pole piece coating scraping device, the scraping device includes a roller, a scraper located on one side of the roller surface, a tensioning structure located on the other side of the roller surface, a force value sensor, an advancing drive structure, a distance measuring sensing structure and a scraping drive structure, the tensioning structure is used to fix the end of the pole piece after the pole piece passes around the roller surface and to apply tension to the pole piece, and the force value sensor is used to monitor and feedback the tension value applied by the tensioning structure;

[0007] The direction of the scraper cutting into the pole piece coating is the X-axis direction, and the roller shaft extension direction is the Y-axis direction to establish a space rectangular coordinate, wherein the scraper blade is parallel to the Y-axis;

[0008] The advancing drive structure drives the scraper to move linearly relative to the pole piece in the X-axis direction, the distance measuring sensing structure is used to detect the distance between the scraper and the pole piece coating, and the scraping drive structure is used to drive the scraper and the pole piece to rotate relative to the roller shaft as the center axis, so as to realize the scraping of the coating.

[0009] Specifically, the tensioning structure comprises 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 pole piece end is fixed by the pole piece end fixing member, and as the pole piece end fixing member moves away from the doctor blade along the traction rail, the pole piece is tensioned and closely attached to the roll surface.

[0010] Specifically, the traction rail comprises a first X-direction linear rail and a second X-direction linear rail, the pole piece end fixing member comprises a first pole piece end fixing member and a second pole piece end fixing member, and the tensioning drive comprises a first tensioning drive and a second tensioning drive; one end of the pole piece is fixed by the first pole piece end fixing member, and the other end is fixed by the second pole piece end fixing member; the first pole piece end fixing member is arranged on the first X-direction linear rail, the second pole piece end fixing member is arranged on the second X-direction linear rail, the first tensioning drive drives the first pole piece end fixing member to move along the first X-direction linear rail, and the second tensioning drive drives the second pole piece end fixing member to move along the second X-direction linear rail.

[0011] Specifically, the roll is a fixed roll, and the doctor blade driving structure drives the doctor blade to rotate around the roll shaft as the center axis or drives the pole piece to slide on the surface of the fixed roll.

[0012] Specifically, the roll is a rotating roll, the pole piece is fixed relative to the rotating roll, and the doctor blade driving structure drives the rotating roll to rotate.

[0013] Specifically, the doctor blade driving structure indirectly drives the rotating roll to rotate through a transmission structure, and the transmission structure is a transmission roll; after the pole piece passes around the roll surface of the transmission roll, one end of the pole piece is wound around the roll surface of the transmission roll in the clockwise direction, is fixed on the roll surface of the transmission roll by the pole piece end fixing member, the other end is wound around the roll surface of the transmission roll in the counterclockwise direction, and is fixed on the roll surface of the transmission roll by the other pole piece end fixing member; the transmission roll rotates to pull the pole piece to drive the rotating roll to rotate, and the tensioning drive drives the pole piece end fixing member and the transmission roll to move along the traction rail synchronously.

[0014] Specifically, the doctor blade driving structure indirectly drives the rotating roll to rotate through a transmission structure, and the transmission structure is a transmission roll; after the pole piece passes around the roll surface of the transmission roll, one end of the pole piece is wound around the roll surface of the transmission roll in the clockwise direction, is fixed on the roll surface of the transmission roll by the pole piece end fixing member, the other end is wound around the roll surface of the transmission roll in the counterclockwise direction, and is fixed on the roll surface of the transmission roll by the other pole piece end fixing member; the transmission roll rotates to pull the pole piece to drive the rotating roll to rotate, and the tensioning drive drives the pole piece end fixing member and the transmission roll to move along the traction rail synchronously.

[0015] Specifically, the doctor blade driving structure indirectly drives the rotating roll to rotate through a transmission structure, and the transmission structure is a transmission roll; after the pole piece passes around the roll surface of the transmission roll, one end of the pole piece is wound around the roll surface of the transmission roll in the clockwise direction, is fixed on the roll surface of the transmission roll by the pole piece end fixing member, the other end is wound around the roll surface of the transmission roll in the counterclockwise direction, and is fixed on the roll surface of the transmission roll by the other pole piece end fixing member; the transmission roll rotates to pull the pole piece to drive the rotating roll to rotate, and the tensioning drive drives the pole piece end fixing member and the transmission roll to move along the traction rail synchronously.

[0016] The application also provides a pole piece coating layering scraping method, which adopts the pole piece coating scraping device and comprises the following steps:

[0017] S1: mounting the pole piece on the scraping device, adjusting the tensioning structure to exert a tension on the pole piece, and ensuring that the tension is within a set pressure through feedback of a force value sensor;

[0018] S2: drive the scraper to move along the X-axis direction until the scraper blade contacts the surface of the coating of the pole piece, and the distance measuring sensor is zeroed;

[0019] S3: drive the scraper to continue moving along the X-axis direction until the blade cuts into the coating to a position with a set minimum depth;

[0020] S4: drive the relative movement between the pole piece and the scraper to scrape the coating;

[0021] S5: make the scraper return to the position defined in S3, repeat S3 and S4 above, and perform multi-layer scraping from shallow to deep at a single position of the pole piece coating.

[0022] Specifically, the pole piece thickness is 10um-5000um, preferably 100um-300um, the coating thickness is 50um-200um, and the tension is 0.1kN-10kN, preferably 0.5kN-10kN.

[0023] Specifically, the depth of each scraping of the coating in S4 is 0.5um-300um, preferably 5um-80um.

[0024] The technical solution provided by the present application has the following advantages compared with the prior art:

[0025] 1. The coating is layered and scraped in the thickness direction, the state of the coating scraped at different depths is obtained, and the coating samples of different depth layers are obtained. By detecting the coating scraped at different depths, the distribution of the composition in the thickness direction of the pole piece coating is obtained, and further guidance is provided for the adjustment of coating formulation and construction process.

[0026] 2. The force value sensor ensures that the tension on the pole piece is relatively stable, and changes in the coating thickness or external force will not cause the pole piece to be damaged due to excessive force or to be separated from the roller surface due to insufficient force, affecting the smooth scraping of the coating.

[0027] 3. The pole piece is supported by the roller surface, the pole piece is highly attached to the roller surface, the pole piece coating is uniformly supported, the depth of the scraper blade is consistent during scraping, the coating powder automatically slides off, which is beneficial for collection and does not interfere with the movement of the scraper. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is the overall structure diagram of the pole piece coating scraping device in embodiment one of the present application;

[0029] Figure 2 is a structure diagram of the pole piece tensioning structure in embodiment one of the present application;

[0030] Figure 3 is the overall structure diagram of the pole piece coating scraping device in embodiment two of the present application;

[0031] Figure 4 is the structure diagram of the scraper connecting structure in embodiment one and embodiment two of the present application;

[0032] Figure 5 is the structure diagram of the transposition driving structure in embodiment one and embodiment two of the present application;

[0033] Figure 6 is the structure diagram of the aggregate box structure in embodiment one and embodiment two of the present application.

[0034] Shown in the figure: 10, base; 20, scraper; 21, clamp; 22, X-direction guide rail; 23, differential head; 24, Y-direction guide rail; 25, sliding seat; 26, rotary motor; 27, ball screw structure; 40, contact displacement sensor; 41, probe end; 50, aggregate box; 51, Y-direction linear rail; 60, force value sensor; 70, pole piece;

[0035] 80, fixed roller; 81, fixed roller support; 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 driving; 95, second tension driving;

[0036] 82, rotating roller; 83, rotating roller support; 96, first gripper; 97, second gripper; 98, transmission roller; 99, driving motor. DETAILED DESCRIPTION

[0037] In order to facilitate understanding, the following describes the pole piece coating scraping device and the pole piece coating layering scraping method in combination with embodiments, and it should be understood that these embodiments are only used for illustrating the present application and are not used for limiting the scope of the present application.

[0038] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation and positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for description purposes and cannot be understood as indicating or implying relative importance.

[0039] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 invention based on the specific circumstances.

[0040] Example 1

[0041] like Figure 1 As shown, the electrode coating scraping device in this embodiment includes a base 10, a fixed roller 80, a scraper 20, a tensioning structure, a force sensor 60, a cutting drive structure, a distance sensing structure, a displacement drive structure, and a collection box structure. In this embodiment, the function of the scraping drive structure can be realized by the tensioning mechanism, that is, the two are combined into one.

[0042] Continue as Figure 1 As shown, in a spatial rectangular coordinate system, with the direction in which the scraper cuts into the electrode coating as the X-axis and the direction of the roller extension as the Y-axis, the scraper 20, the fixed roller 80, and the tensioning structure are arranged sequentially along the X-axis. The blade of the scraper 20 is parallel to the Y-axis. The two ends of the fixed roller 80 are locked to the fixed roller bracket 81 by bolts, and the fixed roller bracket 81 is fixed to the base 10. During the scraping of the coating and adjustment of the electrode tension 70, the fixed roller 80 does not rotate.

[0043] like Figure 2 As shown, the tensioning structure includes a traction rail, electrode end fixing members mounted on the traction rail, and a tensioning drive that drives the electrode end fixing members to move along the traction rail. The tensioning drive consists of a rotary motor and a ball screw. The traction rail is divided into a first X-axis linear rail 92 and a second X-axis linear rail 93 fixed to the base 10. The electrode end fixing members are divided into a first electrode end fixing member 90 and a second electrode end fixing member 91. The tensioning drive is divided into a first tensioning drive 94 and a second tensioning drive 95.

[0044] Continue as Figure 2 As shown, after the electrode 70 passes over the fixed roller 80, one end 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 drives the first electrode end fixing member 90 to move 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.

[0045] likeFigure 1 and Figure 2 As shown, 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 70 slides on the surface of the fixed roller 80, thereby achieving coating scraping. In other words, the function of the scraping drive structure is achieved through the tensioning mechanism.

[0046] Continue as Figure 1 and Figure 2 As shown, 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 that 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 tensioning structure is adjusted, and the force sensor 60 monitors and provides feedback on the tension applied by the tensioning structure.

[0047] Example 2

[0048] like Figure 3 As shown, the electrode coating scraping device in this embodiment includes a base 10, a rotating roller 82, a scraper 20, a tensioning structure, a force sensor, a cutting drive structure, a distance sensing structure, a scraping drive structure, a displacement drive structure, and a collection box structure.

[0049] Continue as Figure 3 As shown, in a spatial rectangular coordinate system, with the direction in which the scraper cuts into the electrode coating as the X-axis and the direction of the roller extension as the Y-axis, the scraper 20 and the rotating roller 82 are arranged along the X-axis. The blade of the scraper 20 is parallel to the Y-axis. The rotating roller 82 is mounted on the base 10 via a rotating roller bracket 83.

[0050] Continue as Figure 3 As shown, the tensioning structure includes a first clamp 96 and a second clamp 97. The tension applied to the electrode by the tensioning structure is achieved by adjusting the distance between the first clamp 96 and the second clamp 97 or by directly adjusting the electrode clamping position.

[0051] The first clamp 96 and the second clamp 97 can be directly mounted on the rotating roller 82, that is, the electrode is fixed around the rotating roller 82. At this time, driving the rotating roller 82 to rotate can realize the rotation of the electrode relative to the scraper and complete the coating scraping.

[0052] In this embodiment, see continue to refer to Figure 2The first clamp 96 and the second clamp 97 are mounted on a transmission roller 98. Specifically, after the electrode 70 passes over the surface of the rotating roller 82, one end of it passes clockwise around the surface of the transmission roller 98 and is fixed to the surface of the transmission roller 98 by the first clamp 96. The other end passes counterclockwise around the surface of the transmission roller 98 and is fixed to the surface of the transmission roller 98 by the second clamp 97. To facilitate timely adjustment of tension, the transmission roller 98 can also be mounted as a whole on an X-axis linear traction rail. The electrode tension is automatically adjusted by controlling the distance between the rotating roller 82 and the transmission roller 98. A force sensor (not shown in the figure) monitors and provides feedback on the tension applied by the tensioning structure.

[0053] Continue as Figure 3 As shown, the scraping drive structure is a drive motor 99 connected to the shaft of the transmission roller 98. The drive motor 99 drives the transmission roller 98 to rotate, and the rotation of the transmission roller 98 pulls the electrode sheet 70 to rotate, thereby driving the rotating roller 82 to rotate, thus realizing the coating scraping.

[0054] It should be noted that the rotating roller 82 can also be fixed and not rotated. That is, the electrode can be driven to slide relative to the surface of the rotating roller 82 by the transmission roller 98, which can also realize the movement of the electrode relative to the scraper and complete the coating scraping.

[0055] like Figure 4 As shown, in the above embodiments one and two, the blade is located at the front end of the scraper 20 facing the roller surface, and the rear end of the scraper 20 is clamped and fixed by the clamp 21.

[0056] like Figure 4 and Figure 5 As shown, the tool feed drive structure is a manual displacement stage, which includes an X-axis guide rail 22 and a differential head 23. The handheld differential head 23 pushes the fixture 21 to reciprocate along the X-axis guide rail 22. The shift drive structure includes a Y-axis guide rail 24, a sliding seat 25, a rotary motor 26, and a ball screw structure 27. The rotary motor 26 drives the ball screw structure 27 to move, which in turn drives the sliding seat 25 to reciprocate along the Y-axis guide rail 24. The tool feed drive structure is mounted on the sliding seat 25 and moves synchronously with the sliding seat 25.

[0057] Continue as Figure 4 and Figure 5 As shown, the ranging sensing structure consists of a vision camera (not shown) and a contact displacement sensor 40. The vision camera is mounted directly above the scraper 20 and moves synchronously with the scraper 20. The detection end 41 of the contact displacement sensor 40 faces the roller surface, while the non-detection end 41 faces away from the roller surface and is fixed by the clamp 21. The leading edge of the detection end 41 is located at the same position on the X-axis as the blade edge of the scraper 20.

[0058] like Figure 4 and Figure 6As shown, the aggregate box structure includes an aggregate box 50, a Y-direction linear rail 51, and a linear motor driving the aggregate box 50 to move along the Y-direction linear rail 51, the aggregate box 50 includes a plurality of hoppers arranged along the Y-axis direction, and each hopper is used to collect the powder coating layer scraped by the doctor blade 20 in a single time.

[0059] The pole piece coating layer delamination scraping method in the embodiment uses the pole piece coating layer scraping device in Embodiment 1, and includes the following steps:

[0060] S1: taking a pole piece with an overall thickness of 10 um-5000 um and a coating layer thickness of 50 um-200 um;

[0061] The pole piece is installed on the pole piece coating layer delamination scraping device, the tension applied to the pole piece by the tensioning structure is adjusted, and the feedback of the force value sensor is used to ensure that the tension is within the set pressure of 0.1 kN-10 kN throughout the process;

[0062] Preferably, the pole piece has an overall thickness of 100 um-300 um, and the tension is in the range of 0.5 kN-10 kN;

[0063] After adjustment, the initial tension feedback by the force value sensor is read;

[0064] S2: driving the doctor blade to advance along the X-axis direction until the doctor blade edge contacts the coating surface, and the distance measuring sensing structure is zeroed; specifically, the contact type displacement sensor 40 feeds back that the doctor blade 20 edge does not contact the coating surface, the vision camera detects the distance between the coating surface and the doctor blade 20 edge, the doctor blade 20 is driven to advance along the X-axis direction until the contact type displacement sensor 40 feeds back that the doctor blade 20 edge contacts the coating surface;

[0065] S3: driving the doctor blade 20 to continue advancing along the X-axis direction until the edge cuts into a set depth, and the set depth range is 0.5 um-300 um; preferably, the set depth range is 5 um-80 um;

[0066] S4: driving the relative movement between the pole piece and the doctor blade until the doctor blade moves a set length relative to the pole piece, and the coating scraping is completed;

[0067] S5: returning the doctor blade to the position in S3, repeating the above S3 and S4, and performing multi-layer scraping from shallow to deep at a single position of the pole piece coating; after the last layer scraping at the single position is completed, the final tension feedback by the force value sensor is read.

[0068] The pole piece coating layer delamination scraping method in the embodiment is used to perform three-layer scraping on the coating, and the statistical data is as follows:

[0069] The pole piece thickness is 300 um;

[0070] The coating thickness is 100 um;

[0071] The length of the blade of the doctor blade 20 is 10 mm;

[0072] The number of hoppers of the aggregate box 50 is 3;

[0073] The initial tension is 1.5 KN, and the final tension is 0.9 KN;

[0074] The set depth is 20 um;

[0075] The set length is 97 um;

[0076] Among them, three hoppers respectively collect sample powders of a layer of the scraped coating.

[0077] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, and not to limit it. Although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part or all of the technical features, and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A scraping device for electrode coating, characterized in that, The scraping device includes a roller, a scraper located on one side of the roller surface, a tensioning structure located on the other side of the roller surface, a force sensor, a cutting drive structure, a distance sensing structure, and a scraping drive structure. The tensioning structure is used to fix the end of the electrode after the electrode passes over the roller surface and to apply tension to the electrode. The force sensor is used to monitor and provide feedback on the tension value applied by the tensioning structure. A spatial rectangular coordinate system is established with the direction in which the scraper cuts into the electrode coating as the X-axis and the direction of the roller extension as the Y-axis, wherein the scraper blade is parallel to the Y-axis. The feed drive structure drives the scraper to move linearly relative to the electrode in the X-axis direction. The distance sensing structure is used to detect the distance between the scraper and the electrode coating. The scraping drive structure is used to drive the scraper and the electrode to rotate relative to each other around the roller shaft as the central axis, thereby realizing coating scraping.

2. The scraping device as described in claim 1, characterized in that, The tensioning structure 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 electrode end is fixed by the electrode end fixing member. As the electrode end fixing member moves away from the scraper along the traction rail, the electrode is tensioned and tightly attached to the roller surface.

3. The scraping device as described in claim 2, characterized in that, The traction rail includes a first X-direction linear rail and a second X-direction linear rail, the electrode end fixing component includes a first electrode end fixing component and a second electrode end fixing component, and the tension drive includes a first tension drive and a second tension drive. One end of the electrode is fixed by a first electrode end fixing member, and the other end is fixed by a second electrode end fixing member. The first electrode end fixing member is set on a first X-axis linear rail, and the second electrode end fixing member is set on a second X-axis linear rail. A first tension drive drives the first electrode end fixing member to move along the first X-axis linear rail, and a second tension drive drives the second electrode end fixing member to move along the second X-axis linear rail.

4. The scraping device as described in claim 1, characterized in that, The roller is a fixed roller, and the scraping drive structure drives the scraper to rotate around the roller shaft as the central axis or drives the electrode sheet to slide on the surface of the fixed roller.

5. The scraping device as described in claim 1, characterized in that, The roller is a rotating roller, with the electrode plate fixed relative to the rotating roller, and the scraping drive structure drives the rotating roller to rotate.

6. The scraping device as described in claim 5, characterized in that, The scraping drive structure indirectly drives the rotating roller to rotate through a transmission structure, which is a transmission roller. After the electrode passes around the roller surface of the rotating roller, one end of the electrode rotates clockwise around the roller surface of the transmission roller and is fixed to the roller surface of the transmission roller by an electrode end fixing member. The other end rotates counterclockwise around the roller surface of the transmission roller and is fixed to the roller surface of the transmission roller by another electrode end fixing member. The rotation of the transmission roller pulls the electrode to drive the rotating roller to rotate, and the tension drive drives the electrode end fixing member and the transmission roller to move synchronously along the traction rail.

7. The scraping device as described in claim 1, characterized in that, It also includes a displacement drive structure, which drives the scraper to move linearly relative to the electrode in the Y-axis direction.

8. The scraping device as described in claim 1, characterized in that, It also includes a collection box and a collection box drive that drives the collection box to move linearly in the Y-axis direction. The collection box includes one or more hoppers arranged along the Y-axis direction, each of which is used to collect coating powder scraped by the scraper in a single stroke.

9. A method for scraping layered coatings on electrode sheets, characterized in that, The electrode coating layer scraping method employs the scraping device as described in any one of claims 1-8, and includes the following steps: S1: Install the electrode onto the scraping device, adjust the tensioning structure to apply tension to the electrode, and ensure that the tension is within the set pressure through feedback from the force sensor; S2: Drive the scraper to advance along the X-axis until the scraper blade contacts the coating surface of the electrode, and the ranging sensing structure returns to zero. S3: Drive the scraper to continue advancing along the X-axis until the blade cuts into the coating to the set minimum depth; S4: Drive the relative movement between the electrode and the scraper to scrape off the coating; S5: Return the scraper to the position defined in S3, and repeat S3 and S4 above to scrape multiple layers of coating from light to dark at a single location on the electrode.

10. The method as described in claim 9, characterized in that, The electrode thickness is 10um to 5000um, preferably 100um to 300um, the coating thickness is 50um to 200um, and the tensile force is 0.1kN to 10kN, preferably 0.5kN to 10kN.

11. The method as described in claim 9, characterized in that, The depth to which the coating is scraped by the scraper in S4 is 0.5um-300um, preferably 5um-80um.

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