A pole piece burr removal system and removal effect evaluation method

Abstract

This invention discloses an electrode burr removal system and a method for evaluating the removal effect, belonging to the field of battery electrode processing and manufacturing technology. It includes a wiping mechanism for wiping the electrode body. The wiping mechanism is provided with a first wiping area and a second wiping area. The first wiping area is provided with a first wiping body, which forms a straight gap on both sides of the electrode body surface for the electrode body to pass through. The second wiping area is provided with a second wiping body, which is elastic and forms a wavy gap on both sides of the electrode body surface for the electrode body to pass through. The peaks and troughs of the wavy gaps alternate continuously, and the peaks wipe the cut edges of the electrode body as it moves forward. This invention can remove burrs from the cut edges of strip-shaped electrodes.

Description

Technical Field

[0001] This invention relates to the field of battery electrode processing and manufacturing technology, and more specifically, to an electrode burr removal system and a method for evaluating the removal effect. Background Technology

[0002] Burrs can be generated during the electrode slitting process. Large burrs can pose a risk of undervoltage or short circuit in the battery. Therefore, burr removal is particularly important in battery electrode manufacturing. Currently, manual sampling of electrodes to check for burrs and then adjusting the blade to reduce the probability of burr formation is a relatively inefficient method.

[0003] Existing technology, such as Chinese patent document CN206893709U, discloses a device for removing burrs from the slitting powder of lithium-ion battery electrode sheets. This device consists of an air shaft, an automatic dust collection device, a brush dust removal device, a receiving hopper, and a rotary motor. The receiving hopper is fixedly mounted on the rotary motor via a shaft and bearings. The rotary motor is fixedly connected to the air shaft via a rotor. The brush dust removal device is fixedly mounted at the bottom end of the receiving hopper, and an automatic dust collection device is fixedly mounted at the other end. During device operation, the electrode sheets are placed inside the receiving hopper. The automatic dust collection device is also connected to a powder filter via a pipe. The brush evenly brushes the slitting surface, and the automatic dust collection device effectively removes burrs from the cut edges. However, this device removes burrs from rolled electrode sheets using a brush, making it inconvenient for removing burrs from the cut edges of sheet-like, extended electrode sheets (i.e., strip-shaped sheets).

[0004] For example, Chinese patent document CN211332529U discloses a battery electrode deburring device that removes burrs from the surface of the strip-shaped electrode by means of the gap between the roller and the roller, but it cannot remove burrs from the cut edges of the electrode. Summary of the Invention

[0005] The purpose of this invention is to provide an electrode burr removal system and a method for evaluating the removal effect, thereby solving the problem that existing electrode burr removal devices are inconvenient for removing burrs from the cut edges of strip-shaped electrodes.

[0006] To achieve the above objectives, the present invention provides an electrode burr removal system, including a wiping mechanism for wiping the electrode body. The wiping mechanism is provided with a first wiping area and a second wiping area. The first wiping area is provided with a first wiping body, which forms a straight gap on both sides of the electrode body surface for the electrode body to pass through. The second wiping area is provided with a second wiping body, which is elastic and forms a wavy gap on both sides of the electrode body surface for the electrode body to pass through. The peaks and troughs of the wavy gaps alternate continuously, and the peaks wipe the tangential edges of the electrode body as the electrode body moves forward.

[0007] Through the above technical solution, the strip-shaped electrode body can pass precisely through the straight gap. Both sides of the straight gap are first wiping bodies, which on one hand deburr the electrode body, and on the other hand, clamp the electrode body, ensuring stable transport. The wavy gap provides greater resistance to the electrode body's advance, extending its passage time and thus increasing the polishing time. The wave crests formed by the elastic second wiping body continuously collide and contact with the tangential edge of the electrode body as it advances, enhancing the wiping effect and improving deburring efficiency.

[0008] Furthermore, the wiping mechanism includes two sets of wiping panels, each set of wiping panels being divided into a first wiping area and a second wiping area; multiple first wiping bodies are provided and arranged in the first wiping area along the forward direction of the electrode body, and the two sets of first wiping bodies are of equal length and are used to clamp the two sides of the surface of the electrode body.

[0009] The two sets of first wiping bodies on both sides of the electrode body are of equal length, so the first wiping area can form a straight gap for the electrode body to pass through, and can perform preliminary wiping and clamping positioning of the electrode body.

[0010] Furthermore, multiple second wiping bodies are provided and arranged along the forward direction of the electrode body in the second wiping area, with the lengths of the second wiping bodies on the same side of the electrode body surface alternating.

[0011] The longer second wiping body forms a peak, and the shorter second wiping body forms a trough. The alternating long and short second wiping bodies on both sides of the electrode body form a wavy gap to wipe away the burrs on the cut edge of the electrode body.

[0012] Furthermore, the hardness of the second wiping body is greater than that of the first wiping body.

[0013] The second wiping body, which has higher hardness, can increase its contact force with the slit surface of the electrode body, and play the role of polishing and wiping the slit end face of the electrode body.

[0014] Furthermore, the wiping panel is provided with multiple small burr removal holes for discharging the wiped-off burrs. This improves burr removal efficiency and reduces burr accumulation in the wiping mechanism.

[0015] Furthermore, it also includes a dust collection mechanism, with the wiping mechanism arranged inside the dust collection mechanism. The dust collection mechanism has multiple dust collection ports on its internal surfaces for multi-faceted dust collection.

[0016] The wiping mechanism is located inside the vacuuming mechanism, preventing wiped-off burrs from flying everywhere and avoiding their escape, thus maintaining a clean working environment and ensuring worker safety. Multiple vacuum ports enable multi-directional vacuuming, which is more efficient at removing burrs than single-sided vacuuming and avoids blind spots.

[0017] Furthermore, the vacuuming mechanism includes a vacuuming housing, which surrounds the outside of the wiping mechanism, and a connecting port is provided on one side of the vacuuming housing; the two wiping panels are distributed on both sides of the center line of the connecting port.

[0018] The dust collection housing serves to prevent burrs from escaping and protect the wiping mechanism. The electrode body enters the dust collection housing through the connecting port and is then cleaned by the wiping mechanism. The wiping panels on both sides allow the electrode body to pass between the two.

[0019] Furthermore, the vacuum housing and the wiping panel are connected by a connector, which pushes the two wiping panels closer to or further apart from each other.

[0020] The connector can adapt to electrode bodies of different thicknesses by adjusting the distance between the two sets of wiping panels, maintaining a good wiping effect on electrode bodies of different thicknesses and improving deburring efficiency.

[0021] Furthermore, a protective mechanism is connected to the outside of the vacuum cleaner housing at the position corresponding to the communication port. The protective mechanism has a protective channel inside, and the protective channel is connected to the inside of the vacuum cleaner housing through the communication port.

[0022] The protective mechanism can increase the contact area between the electrode body and the manual connection process, preventing further damage to the electrode body during manual pulling, thus playing a protective role.

[0023] This invention also provides a method for evaluating the deburring effect of electrode burrs removal, used to evaluate the deburring effect of the above-mentioned electrode burr removal system, comprising the following steps:

[0024] Establish a first online inspection system and a second online inspection system. The first online inspection system detects the edge burrs of the electrode body before deburring and determines NG and saves the image. The second online inspection system detects the edge burrs of the electrode body after deburring and saves the image.

[0025] When the equipment alarms, the system manually reviews the NG (non-deburred) images and the images after deburring, compares and statistically analyzes the burr removal rate, and obtains the system's burr removal effect.

[0026] Compared with existing known technologies, the technical solution provided by this invention has the following beneficial effects:

[0027] This invention discloses an electrode burr removal system. The strip-shaped electrode body can pass precisely through a straight gap. Both sides of the straight gap are first wiping bodies, which both wipe the electrode body to remove burrs and clamp it for stable transport. The wavy gap increases resistance as the electrode body advances, extending its passage time and thus increasing the polishing time. The wave crests formed by the elastic second wiping body continuously collide and contact with the tangential edge of the electrode body as it advances, enhancing the wiping effect and improving deburring efficiency.

[0028] The present invention provides a method for evaluating the removal effect of electrode burrs. Two sets of online burr detection systems are arranged before and after the removal system. By comparing the number of burrs detected, the removal effect is evaluated more accurately than manual sampling.

[0029] It is obvious that the elements or features described in the above individual embodiments can be used alone or in combination in other embodiments. Attached Figure Description

[0030] The dimensions and scales in the accompanying drawings do not represent the actual dimensions and scales of the product. The drawings are for illustrative purposes only, and some non-essential elements or features have been omitted for clarity.

[0031] Figure 1 This is a schematic diagram of the end face structure of the electrode burr removal system in an embodiment of the present invention;

[0032] Figure 2 This is a schematic diagram of the structure of one row of second wiping bodies in the second wiping area of ​​this embodiment of the invention;

[0033] Figure 3 This is a flowchart illustrating the method for evaluating the electrode burr removal effect in an embodiment of the present invention.

[0034] Explanation of reference numerals in the attached figures

[0035] 100. Wiping mechanism; 110. First wiping area; 111. First wiping body; 112. Linear gap; 120. Second wiping area; 121. Second wiping body; 122. Corrugated gap; 130. Wiping panel; 200. Electrode body; 300. Dust collection mechanism; 310. Dust collection housing; 320. Connecting port; 330. Dust collection pipe port; 400. Connector; 410. Adjusting bolt; 420. Adjusting nut; 500. Protective mechanism; 510. Protective channel; 520. Protective panel; 530. Protective hair column; 600. Fixing mechanism. Detailed Implementation

[0036] The present invention will now be described in detail with reference to the accompanying drawings. The embodiments described herein are merely preferred embodiments of the invention; those skilled in the art can conceive of other ways to implement the invention based on these preferred embodiments, and such other ways also fall within the scope of the invention.

[0037] Reference Figure 1-Figure 2 This embodiment provides an electrode burr removal system, including a wiping mechanism 100, a dust collection mechanism 300, and a protective mechanism 500. The wiping mechanism 100 is used to wipe the burrs on the cut edges of the electrode body 200. The dust collection mechanism 300 can suck up the wiped-off burrs and process them centrally. The protective mechanism 500 can prevent the electrode body 200 from being damaged during transportation. Among them, the wiping mechanism 100 is the main component for removing burrs from the cut edges of the electrode body 200. The wiping mechanism 100 is provided with a first wiping area 110 and a second wiping area 120. The first wiping area 110 is provided with a first wiping body 111. The first wiping body 111 is located on both sides of the surface of the electrode body 200, forming a straight gap 112 for the electrode body 200 to pass through. The strip-shaped electrode body 200 can pass precisely through the straight gap 112. Both sides of the straight gap 112 are equipped with first wiping bodies 111, which both deburr and hold the electrode body 200, ensuring stable transport. The second wiping area 120 is provided with second wiping bodies 121, which are elastic. The second wiping bodies 121 form a wavy gap 122 on both sides of the electrode body 200's surface, allowing the electrode body 200 to pass through. The crests and troughs of the wavy gap 122 alternate continuously, with the crests wiping the tangential edges of the electrode body 200 as it advances. The wavy gap 122 provides greater resistance to the electrode body 200's movement, extending its passage time and thus increasing the polishing time. The wave crest formed by the elastic second wiping body 121 continuously collides and contacts the tangential edge of the electrode body 200 as it advances, enhancing the wiping effect and improving deburring efficiency. It is understood that the distance between the straight gap 112 and the wavy gap 122 is much smaller than the thickness of the electrode body 200. In actual wiping, both the first wiping body 111 and the second wiping body 121 are in contact with the electrode body 200 during wiping.

[0038] It should be noted that, as Figure 1 As shown, the wiping mechanism 100 is shown as an end face structure, and the forward direction of the electrode body 200 is perpendicular to the end face structure of the wiping mechanism 100. The first wiping area 110 is located above the second wiping area 120. The electrode body 200 passes through both the first wiping area 110 and the second wiping area 120 simultaneously. The area with more burrs on the cut edge of the electrode body 120 is located in the second wiping area 120, resulting in a better wiping effect in the second wiping area 120.

[0039] Specifically, such as Figure 1 and Figure 2 As shown, the wiping mechanism 100 includes two sets of wiping panels 130, each set of wiping panels 130 being divided into a first wiping area 110 and a second wiping area 120. Multiple first wiping bodies 111 are provided and arranged in the first wiping area 110 along the forward direction of the electrode body 200. The two sets of first wiping bodies 111 are of equal length and are used to clamp the two sides of the surface of the electrode body 200. Therefore, the first wiping area 110 can form a straight gap 112 for the electrode body 200 to pass through, and can wipe and clamp the electrode body 200. Multiple second wiping bodies 121 are provided and arranged in the second wiping area 120 along the forward direction of the electrode body 200. The lengths of the second wiping bodies 121 located on the same side of the surface of the electrode body 200 are alternated. The multiple second wiping bodies 121 on both sides form a row, and the second wiping area 120 has a structure of multiple rows of second wiping bodies 121. The longer second wiping body 121 forms a wave crest, and the shorter second wiping body 121 forms a wave trough. The alternating long and short second wiping bodies 121 on both sides of the electrode body 200 form a wavy gap 122, which wipes away the burrs on the cut edge of the electrode body 200. It should be noted that in this embodiment, both the first wiping body 111 and the second wiping body 121 adopt a wiping bristle column structure, and the hardness of the second wiping body 121 is greater than that of the first wiping body 111. The higher hardness of the second wiping body 121 can increase its contact force with the slit surface of the electrode body 200, thereby polishing and wiping the slit end surface of the electrode body 200. In this embodiment, as Figure 1 As shown, the second wiping body 121 is arranged in three rows, but more rows can also be arranged to prevent the electrode body 200 from shifting. When the electrode body 200 does not shift or shifts only slightly, the first row of second wiping bodies 121 can make sufficient contact with the cut edge of the electrode body 200. Each row has multiple second wiping bodies 121 on one side, specifically 11 or more, which can increase the wiping time and improve the deburring effect.

[0040] It is understandable that, in addition to the dispersed arrangement of wiping bristle columns, the first wiping body 111 and the second wiping body 121 can also adopt an integral structure. The second wiping body 121 is processed into a continuous undulating wave structure on the side facing the electrode body 200, thereby forming a wave gap 122 to improve the wiping efficiency of the burrs on the electrode body 200.

[0041] Furthermore, in order to improve the efficiency of burr removal and reduce the accumulation of burrs in the wiping mechanism 100, the wiping panel 130 is provided with multiple small burr discharge holes for discharging the wiped-off burrs.

[0042] To prevent the burrs removed during wiping from scattering everywhere, such as Figure 1 As shown, the wiping mechanism 100 is arranged inside the vacuuming mechanism 300. Multiple surfaces inside the vacuuming mechanism 300 are provided with vacuum ports for multi-faceted vacuuming of the wiping mechanism 100. Multi-faceted vacuuming improves the efficiency of burr removal, enabling the removal of burrs generated by the wiping mechanism 100 from multiple directions without dead angles. Specifically, the vacuuming mechanism 300 includes a vacuum housing 310, which surrounds the outside of the wiping mechanism 100. A connecting port 320 is provided on one side of the vacuum housing 310, specifically the upper side. The electrode body 200 enters the interior of the vacuum housing 310 through the connecting port 320. Two wiping panels 130 are distributed on either side of the center line of the connecting port 320, allowing the electrode body 200 to pass between the two wiping panels 130. A suction pipe 330 is provided at one end of the suction housing 310. The suction pipe 330 is connected to an external negative pressure device. The negative pressure device generates negative pressure inside the suction housing 310, and the burrs are concentrated and discharged at the suction pipe 330 through the multi-faceted suction ports.

[0043] It is understandable that the thickness of the electrode body 200 generally varies in batteries of different specifications. To ensure that electrode bodies 200 of different thicknesses can also have good wiping and dust removal effects, in some embodiments, the dust collection housing 310 and the wiping panel 130 are connected by a connector 400. The connector 400 pushes the two wiping panels 130 closer together or further apart. Specifically, the connector 400 includes an adjusting bolt 410 and an adjusting nut 420. One end of the adjusting bolt 410 passes through the dust collection housing 310 and is fixedly connected to the wiping panel 130. The adjusting nut 420 is rotatably connected to the outer wall of the dust collection housing 310. The adjusting bolt 410 and the adjusting nut 420 are threadedly engaged. When the adjusting nut 420 is rotated, the adjusting bolt 410 can move linearly along its axial direction, thereby driving the wiping panel 130 to move linearly. Furthermore, by changing the direction of rotation of the adjusting nut 420, the direction of movement of the wiping panel 130 can be changed, thereby adjusting the distance between the two wiping panels 130.

[0044] In some embodiments, such as Figure 1As shown, a protective mechanism 500 is connected to the exterior of the vacuum housing 310 at a position corresponding to the connecting port 320. A protective channel 510 is provided inside the protective mechanism 500, communicating with the interior of the vacuum housing 310 through the connecting port 320. The electrode body 200 passes through the protective channel 510 into the vacuum mechanism 300. Specifically, the protective mechanism 500 includes an external protective panel 520 and protective bristles 530 located on the inner side of the protective panel 520, facing the protective channel 510. The protective bristles 530 are elastic and made of a relatively soft material, preventing scratches on the electrode body 200 and increasing the contact area between the electrode body 200 and the manual application process, preventing further damage to the electrode body 200 during manual pulling, thus providing protection. The protective panel 520 is rigid, providing structural protection.

[0045] Furthermore, in some embodiments, a fixing mechanism 600 is also connected to the outside of the vacuum cleaner housing 310. The fixing mechanism 600 includes three connecting surfaces, each of which is provided with a fixing interface. The corresponding fixing interface can be selected for fixing connection according to actual working needs.

[0046] Another aspect of this application provides a method for evaluating the effect of electrode burr removal, such as... Figure 3 As shown, the deburring effect of the above-mentioned electrode deburring system includes the following steps:

[0047] Two sets of online burr detection systems are set up before and after the deburring system, namely the first online detection system and the second online detection system. The distance between the two sets of burr detection systems should not be too close. First, tape is attached to the edge of the electrode body 200. The first online detection system is turned on first. After detecting the tape and the edge burr of the electrode body 200 before deburring, it is judged as NG, the image is saved, and a signal is sent to turn on the second online detection system. The second online detection system is turned on to detect the edge burr of the electrode body 200 after deburring and save all images.

[0048] After a period of time, such as time T, the equipment alarms, and manual inspection is conducted. The time of tape detection by two sets of systems is approximated as the time difference between two images taken at the same location. The time of the NG (not good) images detected by the first set is compared with the corresponding images saved by the second set of detections, and the results are statistically analyzed. This process is repeated to calculate the burr removal rate, obtain the removal effect of the electrode removal system, and discard useless photos. Using two sets of online burr detection systems deployed before and after the removal system, and comparing the number of detected burrs, the evaluation of the removal effect is more accurate than manual sampling.

[0049] In the description of this invention, it should be noted that the terms "front," "rear," "left," "right," "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0050] 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.

[0051] The scope of protection of this invention is defined only by the claims. Thanks to the teachings of this invention, those skilled in the art will readily recognize that alternative structures to the structures disclosed herein can be used as feasible alternative implementations, and that the embodiments disclosed herein can be combined to produce new implementations, which also fall within the scope of the appended claims.

Claims

1. A burr removal system for electrode sheets, comprising a wiping mechanism (100) for wiping an electrode sheet body (200), characterized in that, The wiping mechanism (100) is provided with a first wiping area (110) and a second wiping area (120). The first wiping area (110) is provided with a first wiping body (111), which forms a straight gap (112) on both sides of the surface of the electrode body (200) for the electrode body (200) to pass through. The second wiping area (120) is provided with a second wiping body (121), which is elastic. The second wiping body (121) forms a wavy gap (122) on both sides of the surface of the electrode body (200) for the electrode body (200) to pass through. The crests and troughs of the wavy gap (122) alternate continuously. The crests are formed when the electrode body (200) advances. The electrode body (200) is wiped at the cut edge; the wiping mechanism (100) includes two sets of wiping panels (130), each set of wiping panels (130) is divided into a first wiping area (110) and a second wiping area (120); a plurality of first wiping bodies (111) are provided and arranged in the first wiping area (110) along the forward direction of the electrode body (200), the two sets of first wiping bodies (111) are of equal length and are used to clamp the two sides of the surface of the electrode body (200); a plurality of second wiping bodies (121) are provided and arranged in the second wiping area (120) along the forward direction of the electrode body (200), the lengths of the second wiping bodies (121) located on the same side of the surface of the electrode body (200) are arranged alternately.

2. The electrode burr removal system according to claim 1, characterized in that, The hardness of the second wiping body (121) is greater than that of the first wiping body (111).

3. The electrode burr removal system according to claim 1, characterized in that, The wiping panel (130) is provided with multiple small holes for removing burrs that have been wiped off.

4. The electrode burr removal system according to claim 1, characterized in that, It also includes a vacuuming mechanism (300), the wiping mechanism (100) is arranged inside the vacuuming mechanism (300), and the vacuuming mechanism (300) has multiple vacuuming ports on its interior surfaces for vacuuming the wiping mechanism (100) from multiple surfaces.

5. The electrode burr removal system according to claim 4, characterized in that, The vacuuming mechanism (300) includes a vacuum housing (310) which surrounds the outside of the wiping mechanism (100). A connecting port (320) is provided on one side of the vacuum housing (310). Two wiping panels (130) are distributed on both sides of the center line of the connecting port (320).

6. The electrode burr removal system according to claim 5, characterized in that, The vacuum housing (310) and the wiping panel (130) are connected by a connector (400), which pushes the two wiping panels (130) closer to or further apart from each other.

7. The electrode burr removal system according to claim 5, characterized in that, A protective mechanism (500) is connected to the outside of the vacuum housing (310) at the position corresponding to the communication port (320). A protective channel (510) is provided inside the protective mechanism (500), and the protective channel (510) is connected to the inside of the vacuum housing (310) through the communication port (320).

8. A method for evaluating the deburring effect of electrode burrs removal, used to evaluate the deburring effect of the electrode burr removal system according to any one of claims 1-7, characterized in that, Includes the following steps: A first online detection system and a second online detection system are established. The first online detection system detects the edge burrs of the electrode body (200) before deburring and determines NG and saves the image. The second online detection system detects the edge burrs of the electrode body (200) after deburring and saves the image. When the equipment alarms, the system manually reviews the NG (non-deburred) images and the images after deburring, compares and statistically analyzes the burr removal rate, and obtains the system's burr removal effect.

Images