Burr removing assembly and equipment

Abstract

The utility model discloses a burr removing assembly and equipment, the burr removing assembly is used for removing burrs on the edge part of a pole piece, the burr removing assembly comprises a first part and an electrode, a first notch is formed in the first side wall of the first part, and the edge part of the pole piece can penetrate through the first notch; the electrode is arranged in the first notch, and when the edge part of the pole piece penetrates through the first notch, the electrode generates point discharge ablation on burrs on the edge part of the pole piece, so that the burrs on the edge part of the pole piece are removed; when the pole piece penetrates through the first notch, the pole piece is kept not in contact with the first component. According to the technical scheme, the electrode arranged on the first component discharges and ablates the burrs on the edge part of the pole piece, so that the burrs are effectively removed, and the damage to the edge of the pole piece and the coating of the pole piece in the burr removal process is avoided; by changing the distance between the edge of the pole piece and the first component, the requirement for removing burrs of different lengths is met, and the distance between the edge of the pole piece and the first component is automatically adjusted.

Description

Technical Field

[0001] This disclosure generally relates to the field of lithium battery manufacturing equipment technology. More specifically, this disclosure relates to a lithium battery burr removal assembly. Background Technology

[0002] With the development of lithium battery technology, lithium batteries have been widely used in various energy storage fields due to their small size and high energy density. A lithium battery cell is composed of positive electrode plates, negative electrode plates, and a separator stacked on top of each other. The separator is used to separate the positive and negative electrode plates to prevent them from coming into contact with each other and causing a short circuit.

[0003] During the manufacturing process, coated strip electrodes need to be mechanically cut (e.g., slitting) according to the design. During this mechanical cutting, burrs are easily generated on the edges of the electrodes. Due to the layered structure of lithium-ion battery cells, adjacent positive and negative electrodes are separated by a separator, which is typically a polymer film only 5-25 micrometers thick. When burrs face the separator and exceed its thickness, because the burrs on the edge of the electrode are also made of metal, they can easily pierce the film and come into contact with the electrode on the other side, causing the positive and negative electrodes to conduct electricity, leading to a short circuit in the battery. This causes self-discharge and increases the battery temperature, potentially leading to serious accidents such as spontaneous combustion or even explosion. Therefore, during the processing of lithium-ion battery electrodes, it is necessary to remove burrs from the edges of the electrodes.

[0004] To address this technical problem, some technical solutions have been disclosed in the existing technology.

[0005] One disclosed method involves using a pressure roller device to roll the edges of the electrode after cutting, changing the direction of the burrs on the edge portion of the electrode so that the burrs are parallel to the electrode surface. However, this method does not truly remove the burrs; it merely changes their orientation. Longer burrs still have the potential to pierce the separator. Furthermore, in subsequent stacking steps, as the separator is straightened to wrap around the electrode edges, the orientation of the burrs on the edge portion of the electrode may change again under the action of the separator, causing the burrs to no longer remain parallel to the electrode surface but instead point towards other electrodes. This can lead to separator puncture and short circuits between the positive and negative electrodes during the stacking process.

[0006] One disclosed method involves placing multiple grinding machines on both sides of the electrode during its transport. Each grinding machine has a grinding wheel at its top, positioned close to the edge of the electrode to remove burrs from the edge portion. However, this method removes burrs through friction. In actual production, the electrode inevitably experiences slight vibrations during transport, causing the grinding machines to directly contact the electrode edge, resulting in wear. Furthermore, due to the thinness of the electrode, direct contact between the edge and the grinding machine may cause the edge to twist along the rotation direction of the grinding wheel, leading to deformation of the electrode edge.

[0007] One disclosed method involves removing burrs from the edges of electrodes using an electrochemical approach. Electrochemical deburring is a process that removes burrs by utilizing the anodic dissolution of metal in an electrolyte. The method is primarily based on the principle of a viscous liquid film. During electrochemical deburring, when the cathode and anode are immersed in the solution and an electric current is applied, an electrochemical reaction occurs on the anode surface, forming a viscous liquid film. This film, concentrated in the recesses of the electrode, has high resistance and low conductivity, protecting the surface of the component from corrosion. Since the burrs protrude from the surface, the electric field lines are highly concentrated after current is applied, causing the burrs to dissolve first and thus be removed. However, this method uses chemical reagents, which inevitably come into contact with the electrode coating during the burr dissolution process, leading to contamination or damage to the electrode and consequently affecting its performance.

[0008] In view of this, there is an urgent need to provide a burr removal equipment solution that can remove burrs of a specific length from the edge of the electrode sheet according to the design, preventing burrs on the edge of the electrode sheet from piercing the diaphragm and causing a short circuit, rather than simply changing the orientation angle of the burrs. At the same time, this burr removal process can also avoid damaging the electrode sheet, including avoiding damage to the electrode sheet edges and the electrode sheet coating. Utility Model Content

[0009] To address the aforementioned technical issues, this disclosure presents a technical solution for a burr removal component and device in several aspects.

[0010] In a first aspect, this disclosure provides a burr removal assembly for removing burrs from an edge portion of an electrode sheet. The burr removal assembly includes: a first component and an electrode. A first sidewall of the first component forms a first notch for the edge portion of the electrode sheet to pass through the first notch. The electrode is disposed in the first notch, and when the edge portion of the electrode sheet passes through the first notch, the electrode removes the burrs from the edge portion of the electrode sheet by generating a tip discharge ablation on the burrs. The electrode sheet remains in no contact with the first component when passing through the first notch.

[0011] In some embodiments, the burr removal assembly further includes a track disposed on the substrate, and the first component is slidably disposed on the track to facilitate adjustment of the distance between the first component and the electrode.

[0012] In some embodiments, the deburring assembly further includes a drive device connected to the first component to drive the first component to slide along the track; the drive device includes a drive motor and a ball screw, the drive motor being able to drive the ball screw to rotate, and the first component being connected to the ball screw so as to be driven when the ball screw rotates.

[0013] In some embodiments, the burr removal assembly further includes a distance sensor and a controller; the distance sensor is disposed in the first notch for sensing the distance between the edge of the electrode and the electrode; the controller is connected to the drive motor to control the rotation degree of the ball screw; the distance sensor is connected to the controller to control the rotation degree of the ball screw so that the distance between the electrode and the electrode reaches a preset distance.

[0014] In a second aspect, this disclosure provides a burr removal device for removing burrs from the edge portion of an electrode sheet, wherein the device includes any of the burr removal components disclosed herein; the device includes at least two of the burr removal components, with at least one of the burr removal components disposed on each side of the electrode sheet.

[0015] By using the burr removal components and equipment provided above, this embodiment of the invention ablates the burrs on the edge portion of the electrode sheet by discharging an electrode disposed on the first component. This prevents the burrs on the edge portion of the electrode sheet from piercing the separator, causing the positive and negative electrodes of the battery to come into contact and resulting in a short circuit. At the same time, this technical solution can effectively remove burrs and avoid damage to the electrode edge and electrode coating during the burr removal process.

[0016] Furthermore, according to one embodiment, by setting the first component on a track perpendicular to the edge of the electrode, the position of the first component can be adjusted, thereby changing the distance between the edge of the electrode and the electrode to meet the requirement of removing burrs of different lengths.

[0017] Furthermore, according to one embodiment, by using a drive motor and a ball screw as drive devices, the position of the first component can be finely adjusted, ensuring that the first component moves smoothly along the track direction.

[0018] Furthermore, according to one embodiment, the position of the first component is automatically adjusted by combining a distance sensor, a controller, and a drive device, thereby reducing the need for manual labor. Attached Figure Description

[0019] The above and other objects, features, and advantages of exemplary embodiments of this disclosure will become readily apparent upon reading the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of this disclosure are illustrated by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein:

[0020] Figure 1 A schematic diagram of the overall structure of the deburring component is shown;

[0021] Figure 2 A schematic diagram of the structure of the first component in the deburring assembly is shown;

[0022] Figure 3a , Figure 3b A schematic diagram of the structure of the first notch in the first component of the deburring assembly is shown;

[0023] Figure 4 A schematic diagram of the overall structure of the burr removal equipment is shown.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1-Burnt removal assembly, 1a-First burr removal assembly, 1b-Second burr removal assembly, 11-First component, 111-First sidewall, 112-Second sidewall, 113-Third sidewall, 115-First notch, 1151-First part of first notch, 1152-Second part of first notch, 116-Second notch, 117-Ball screw nut, 1171-Ball screw nut through hole, 12-Electrode, 13-Substrate, 14-Railway, 15-Drive device, 151-Drive motor, 152-Ball screw, 153-Ball screw support, 16-Distance sensor, 161-Distance sensor first component, 162-Distance sensor second component;

[0026] 5-Roller passing device, 51-First roller passing device, 52-Second roller passing device;

[0027] 8-Electrode, 81-Burst;

[0028] 91 - First direction, 92 - Second direction, 93 - Third direction. Detailed Implementation

[0029] The technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this disclosure, not all of them. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0030] It should be understood that the terms “comprising” and “including” used in this disclosure and claims indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0031] It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of this disclosure. As used in this disclosure and claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used in this disclosure and claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes such combinations.

[0032] As used in this specification and claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if [described condition or event] is detected" may be interpreted, depending on the context, as "once determined," "in response to determination," "once [described condition or event] is detected," or "in response to detection of [described condition or event]."

[0033] The specific embodiments disclosed herein will now be described in detail with reference to the accompanying drawings.

[0034] Figure 1 A schematic diagram of the overall structure of the deburring component is shown.

[0035] like Figure 1As shown, a burr removal assembly is used to remove burrs from the edge portion of an electrode sheet. The burr removal assembly 1 includes: a first component 11 and an electrode 12. The first sidewall 111 of the first component 11 forms a first notch 115 for the edge portion of the electrode sheet 8 to pass through the first notch 115. The electrode 12 is disposed in the first notch 115. When the edge portion of the electrode sheet 8 passes through the first notch 115, the electrode 12 removes the burrs 81 on the edge portion of the electrode sheet 8 by generating tip discharge ablation on the burrs 81 on the edge portion of the electrode sheet 8. The electrode sheet 8 remains in no contact with the first component 11 when passing through the first notch 115.

[0036] Specifically, the burr removal assembly 1 includes a first component 11 and an electrode 12 disposed on the first component 11, wherein the first component 11 is used to fix the electrode 12 at a specific position relative to the electrode plate 8.

[0037] Figure 2 A schematic diagram of the structure of the first component in the deburring assembly is shown. Figure 2 As shown, the side of the first component 11 facing the electrode 8 is a first sidewall 111. The first sidewall 111 of the first component 11 forms a first notch 115. The first notch 115 is recessed into the first component 11 along the first sidewall 111. The cross-section of the first notch 115 along the third direction 93 is U-shaped. At the same time, the first notch 115 penetrates the second sidewall 112 and the third sidewall 113 perpendicular to the first sidewall 111 along the second direction 92. The height of the first notch 115 along the third direction 93 is greater than the thickness of the electrode 8 along the third direction 93, so that when the electrode 8 moves along the second direction 92, the edge of the electrode 8 near the first component 11 passes through the first notch 115 without obstruction.

[0038] The first gap 115 may include a first gap first portion 1151 and a first gap second portion 1152, which are interconnected. Both the first gap first portion 1151 and the first gap second portion 1152 have U-shaped cross-sections along a third direction 93. Furthermore, the height of the first gap first portion 1151 along the third direction 93 is greater than the height of the first gap second portion 1152 along the third direction 93, and the first gap second portion 1152 is located on a second direction 92 of the first gap first portion 1151.

[0039] Figure 3a , Figure 3b A schematic diagram of the structure of the first notch in the first component of the deburring assembly is shown.

[0040] like Figure 3a , Figure 3bAs shown, an electrode 12 is disposed within the second portion 1152 of the first notch of the first component 11. The electrode 12 is disposed at the bottom of the second portion 1152 of the first notch along the first direction 91, and is used to discharge toward the edge of the electrode plate 8. The first component 11 supports the electrode 12, so that the electrode 12 is at the same height as the electrode plate 8, and maintains a preset distance from the edge of the electrode plate 8 facing the electrode 12, thus avoiding direct contact between the electrode 12 and the edge of the electrode plate 8, and ensuring that the distance between the electrode 12 and the edge of the electrode plate 8 facing the electrode 12 is not too far. In addition, the outer shell of the first component 11 is made of insulating material to prevent the current released by the electrode 12 from directly passing through the outer shell of the first component 11.

[0041] The working principle of removing burrs 81 on the edge portion of the electrode 8 is as follows: the electrode 12 discharges to the edge of the electrode 8 facing the electrode 12. When there are burrs 81 longer than a certain length on the edge of the electrode 8 facing the electrode 12, due to the tip discharge effect, current passes through the electrode 12, breaks down the air, and forms a circuit through the burr 81. Due to the thermal effect of the current, the burr 81 generates a large amount of heat, causing the burr 81 to be ablated, thereby removing burrs 81 longer than the certain length. Burrs 81 shorter than the certain length, due to their shorter length, fail to have current pass through the electrode 12 to break down the air, and therefore fail to form a circuit through the burr 81, thus the burr 81 is not ablated. This method removes burrs 81 by ablation, thereby avoiding the disadvantages of the technical solutions described in the background art.

[0042] In some embodiments, the burr removal assembly 1 further includes a substrate 13, and a first component 11 is disposed on the substrate 13.

[0043] Specifically, both the lower and upper surfaces of the substrate 13 along the third direction 93 remain horizontal, so that the other components of the burr removal assembly 1 disposed on the substrate 13 remain horizontal. Simultaneously, since the burrs 81 on the edge portion of the electrode 8 are removed by ablation, some of the ablation residue will fall onto the substrate 13 along the first notch 115. The material of the substrate 13 is not limited and can be a material that is easy to clean.

[0044] The first component 11 is disposed on the substrate 13, and the connection between the two is unrestricted. Preferably, the first component 11 is detachably fixed to the substrate 13 using fasteners to facilitate the installation and removal of the first component 11.

[0045] In some embodiments, the burr removal assembly 1 further includes a track 14 disposed on the substrate 13, and a first component 11 is slidably disposed on the track 14 to facilitate adjustment of the distance between the first component 11 and the electrode 8.

[0046] Specifically, the track 14 is disposed on the substrate 13 along the first direction 91, and the bottom of the first component 11 has a second notch 116 extending through the first direction. The track 14 and the second notch 116 cooperate with each other, allowing the track 14 to slide within the second notch 116, thereby enabling the first component 11 to be slidably disposed on the track 14. The track 14 allows the first component 11 to slide along the first direction 91, changing the distance between the first component 11 and the electrode 8.

[0047] This application removes burrs 81 of a certain length from the edge of the electrode 8 facing the electrode 12 by discharging the electrode 12 onto the electrode 8. Due to the tip discharge effect, burrs 81 of a certain length are ablated. Therefore, burrs 81 of a certain length can be removed by adjusting the distance between the electrode 8 and the first component 11 according to actual needs.

[0048] In some embodiments, the burr removal assembly 1 further includes a drive device 15 connected to the first component 11 to drive the first component 11 to slide along the track 14.

[0049] The drive device 15 is used to move the first component 11 along the track 14, and the structure of the drive device 15 is not limited. The distance between the first component 11 and the electrode 8 can be changed by the track 14, either manually or mechanically. In this embodiment, mechanical adjustment is preferred, as it is more precise and convenient, saving manpower. The drive device 15 is disposed on the substrate 13 and drives the first component 11 to slide along the track 14, thereby changing the position of the first component 11 in the first direction 91.

[0050] In some embodiments, the drive device 15 includes a drive motor 151 and a ball screw 152. The drive motor 151 can drive the ball screw 152 to rotate. The first component 11 is connected to the ball screw 152 and is thus driven when the ball screw 152 rotates.

[0051] Preferably, in this embodiment, the driving device 15 includes a drive motor 151 and a ball screw 152. The drive motor 151 is rotatably connected to the ball screw 152. The drive motor 151 is located on the first direction 91 of the ball screw 152, and the axis of the ball screw 152 is parallel to the track 14. The drive motor 151 drives the ball screw 152 to rotate, thereby causing the ball screw nut 117 to move. A ball screw nut through hole 1171 is formed on the ball screw nut 117, and the ball screw nut through hole 1171 passes through the ball screw nut 117 along the axial direction of the ball screw 152. The ball screw 152 and the ball screw nut 117 are rotatably connected. When the ball screw 152 rotates, the ball screw nut 117 moves along the axial direction of the ball screw 152, thereby causing the first component 11 to move along the axial direction of the ball screw 152. A ball screw support 153 is provided at the other end of the ball screw 152. The ball screw support 153 is rotatably connected to the ball screw 152 and is used to support the ball screw 152. The ball screw support 153 forms a through hole extending through the ball screw support 153 along a first direction 91, and the ball screw 152 can rotate within the through hole. Through the support of the drive motor 151 at one end of the ball screw 152 and the ball screw support 153 at the other end, the axis of the ball screw 152 is always kept parallel to the base plate 13.

[0052] In some embodiments, the burr removal assembly 1 further includes a distance sensor 16 disposed in the first notch 115 for sensing the distance between the edge of the electrode 8 and the electrode 12.

[0053] The choice of distance sensor is not limited. In this embodiment, a high-precision laser edge measurement sensor is preferred to detect the edge of the electrode 8 in a timely and accurate manner, and adjust the position of the first component 11 according to the result.

[0054] The distance sensor may include a first distance sensor component 161 and a second distance sensor component 162, which are disposed opposite to each other along a third direction 93 in the first notch first portion 1151, and cooperate with each other during measurement.

[0055] For example, the first distance sensor component 161 emits a laser beam towards the second distance sensor component 162, and the second distance sensor component 162 can detect that it is being irradiated by the laser. When the second distance sensor component 162 cannot detect that it is being irradiated by the laser, it indicates that there is an object located between the first distance sensor component 161 and the second distance sensor component 162, blocking the laser beam emitted by the first distance sensor component 161. At this time, since the edge of the electrode 8 extends into the first notch 115 in the first direction 91, the edge of the electrode 8 can act as an object blocking the laser beam. Therefore, it can be determined that the edge of the electrode 8 has blocked the laser beam emitted by the first distance sensor component 161, that is, at this time the edge of the electrode 8 is located between the first distance sensor component 161 and the second distance sensor component 162.

[0056] The distance sensor 16 can sense the distance between the edge of the electrode 8 and the electrode 12 based on the specific position where the edge of the electrode 8 extends into the first notch 115 in the first direction 91. The user can then adjust the position of the first component 11 in the first direction 91 based on this distance to maintain a specific distance between the edge of the electrode 8 and the electrode 12.

[0057] In some embodiments, the burr removal assembly 1 includes a distance sensor 16 and a controller (not shown in the figure); the distance sensor 16 is disposed in the first notch 115 for sensing the distance between the electrode 8 and the electrode 12; the controller is connected to the drive motor 151 to control the rotation of the ball screw 152; the distance sensor 16 is connected to the controller to control the rotation of the ball screw 152 so that the distance between the electrode 12 and the electrode 8 reaches a preset distance.

[0058] Specifically, the deburring assembly 1 includes a distance sensor 16 and a controller. The results acquired by the distance sensor 16 are transmitted to the controller, which in turn controls the drive device 15. Preferably, the distance sensor 16 is a high-precision laser edge measurement sensor. The controller controls the drive device 15 based on the data from the distance sensor 16. The controller is not specifically limited and can be a microcontroller or a general-purpose processor. The controller can be located within the deburring assembly 1 or can be an external device electrically connected to the deburring assembly 1.

[0059] When the controller adjusts the drive device 15, the controller controls the drive motor 151 to rotate in a clockwise or counterclockwise direction, and controls the rotation degree of the ball screw 152, including controlling the angular velocity of rotation and controlling the total angle of rotation, so that the first component 11 slides smoothly along the track 14 in the first direction 91.

[0060] Figure 4 A schematic diagram of the overall structure of the burr removal equipment is shown.

[0061] like Figure 4 As shown, a burr removal device is used to remove burrs on the edge portion of an electrode sheet, including the burr removal component 1 described in any one of the claims of this application. The device includes at least two burr removal components, respectively referred to as a first burr removal component 1a and a second burr removal component 1b. At least one burr removal component 1 is provided on each side of the electrode sheet 8 with a first notch 115 facing each other.

[0062] The burr removal assembly 1 removes burrs 81 from the edge portion of the electrode 8 by ablation. This burr removal device, by including the burr removal assembly 1, can remove burrs 81 from the edge portion of the electrode 8. Using the burr removal assembly 1 to remove burrs 81 from the edge portion of the electrode 8 allows for ablation of the burrs on the edge portion of the electrode by electrode discharge, thereby preventing the burrs on the edge portion of the electrode from piercing the separator. Furthermore, the burr removal assembly 1 effectively removes burrs while avoiding damage to the electrode edge and electrode coating during the burr removal process.

[0063] Specifically, the first burr removal component 1a and the second burr removal component 1b are disposed on both sides of the electrode 8 along the second direction 92, and the first notches 115 of the two burr removal components 1a are oriented opposite to each other, facing the first direction 91 and the opposite direction of the first direction 91, respectively. Figure 4 As shown, the direction of the first notch 115 of the first burr removal component 1a is the first direction 91, and the direction of the first notch 115 of the second burr removal component 1b is the opposite direction of the first direction 91. These two burr removal components 1 are used to remove burrs from one side of the electrode 8. Figure 4 As shown, the first burr removal component 1a is used to remove burrs on the opposite side of the first direction 91 of the electrode 8, and the second burr removal component 1b is used to remove burrs on one side of the first direction 91 of the electrode 8. Therefore, by providing burr removal components 1 on both sides of the electrode 8, burrs 81 on the corresponding two edge portions of the electrode 8 can be removed simultaneously, thereby improving production efficiency.

[0064] The first burr removal component 1a and the second burr removal component 1b have the same height along the third direction. The positions of the first burr removal component 1a and the second burr removal component 1b along the second direction 92 can be the same, that is, the first burr removal component 1a and the second burr removal component 1b are arranged opposite each other, or they can be different, such as... Figure 4 The same staggered setup is shown.

[0065] In addition, multiple burr removal components 1 can be provided on the same side of the electrode 8, which can avoid the situation where the burrs 81 that should be removed are not removed when only one burr removal component 1 is provided on one side.

[0066] In some embodiments, the burr removal device further includes a roller device 5, which includes at least a first roller 51 and a second roller 52. The electrode sheet 8 is laid flat on the first roller 51 and the second roller 52. The first roller 51 and the second roller 52 drive the electrode sheet 8 to move. The burr removal component 1 is disposed between the first roller 51 and the second roller 52 and keeps the electrode sheet 8 stable when passing through the burr removal component 1.

[0067] Specifically, the deburring equipment further includes a roller device 5, which is disposed on both sides of the deburring assembly 1 along the first direction 91. The roller device 5 includes at least a first roller 51 and a second roller 52. The first roller 51 and the second roller 52 are identical rollers with the same size and rotational speed. The first roller 51 and the second roller 52 are disposed at the same height along the third direction 93, and the axes of the first roller 51 and the second roller 52 are both along the first direction and are parallel to each other. The electrode 8 is laid flat on the first roller 51 and the second roller 52 and is driven by the roller device 5 to move along the second direction 92, keeping the electrode 8 parallel to the horizontal plane and maintaining the same height of the electrode 8 along the third direction 93. One or more burr removal components 1 are disposed between the first roller 51 and the second roller 52 along the second direction 92, so that when the electrode 8 passes through the first roller 51 and the second roller 52, the burrs 81 on the edge portion of the electrode 8 along the first direction can be ablated by the burr removal components 1 disposed on the first direction 91 of the electrode 8.

[0068] In some embodiments, the burr removal device further includes a front steel roller (not shown in the figure), wherein the front steel roller and the electrode 12 are electrically connected to a power source (not shown in the figure), and the electrode 8 is in contact with the front steel roller. When the electrode 12 generates a tip discharge on the burr 81 on the edge portion of the electrode 8, the power source, the electrode 12, the electrode 8 and the front steel roller form a conductive circuit.

[0069] Specifically, the deburring equipment also includes a leading steel roller made of conductive material, electrically connected to a power source, and in contact with the electrode 8, allowing current to pass through the power source, the leading steel roller, and the electrode 8. When the distance between the burr 81 on the edge of the electrode 8 and the electrode 12 within the first notch 115 of the first component 11 is less than a specific length, due to the tip discharge effect, current passes through the electrode 12, breaks down the air, and forms a circuit through the burr 81. At this time, the power source, electrode 12, electrode 8, and leading steel roller form a conductive circuit, allowing current to pass along this circuit. Simultaneously, due to the thermal effect of the current, the burr 81 generates significant heat, causing it to be ablated, thereby removing burrs 81 longer than the specific length.

[0070] The power supply is not limited; it can be powered by an external AC power source or by a battery.

[0071] The embodiments disclosed herein use electrode discharge on the first component to ablate burrs on the edge portion of the electrode sheet, preventing burrs on the edge portion of the electrode sheet from piercing the separator and causing the positive and negative electrodes of the battery to come into contact, resulting in a short circuit. Simultaneously, this technical solution effectively removes burrs and avoids damage to the electrode edge and electrode coating during the burr removal process.

[0072] The embodiments disclosed herein achieve adjustment of the position of the first component by setting the first component on a track perpendicular to the edge of the electrode, thereby changing the distance between the edge of the electrode and the electrode to meet the requirements for removing burrs of different lengths.

[0073] The embodiments disclosed herein use a drive motor and a ball screw as drive devices to achieve fine adjustment of the position of the first component, which can ensure that the first component moves smoothly along the track direction.

[0074] The embodiments disclosed herein achieve automatic adjustment of the position of the first component by combining a distance sensor, a controller, and a drive device, thereby reducing the need for manual labor.

[0075] While numerous embodiments of this disclosure have been shown and described herein, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Many modifications, alterations, and alternatives will occur to those skilled in the art without departing from the spirit and intent of this disclosure. It should be understood that various alternatives to the embodiments of this disclosure described herein may be employed in the practice of this disclosure. The appended claims are intended to define the scope of this disclosure and therefore cover equivalents or alternatives within the scope of these claims.

Claims

1. A burr removing assembly for removing a burr on an edge portion of a pole piece, characterized by, The burr removing assembly (1) comprises a first component (11) and an electrode (12), A first side wall (111) of the first component (11) forms a first gap (115) for the edge portion of the pole piece (8) to pass through the first gap (115); The electrode (12) is arranged in the first gap (115), and when the edge portion of the pole piece (8) passes through the first gap (115), the electrode (12) removes the burr (81) on the edge portion of the pole piece (8) by generating a tip discharge ablation on the burr (81) on the edge portion of the pole piece (8); wherein the pole piece (8) is in contact with the first component (11) when passing through the first gap (115).

2. The assembly of claim 1, wherein, Further comprising a substrate (13), the first component (11) is arranged on the substrate (13).

3. The assembly of claim 2, wherein, Further comprising a track (14), the track (14) is arranged on the substrate (13), and the first component (11) is slidably arranged on the track (14) to facilitate adjustment of the distance between the first component (11) and the pole piece (8).

4. The assembly of claim 3, wherein, Further comprising a driving device (15) connected with the first component (11) to drive the first component (11) to move slidably along the track (14).

5. The assembly of claim 4, wherein, The driving device (15) comprises a driving motor (151) and a ball screw (152), the driving motor (151) can drive the ball screw (152) to rotate, and the first component (11) is connected to the ball screw (152) to be driven when the ball screw (152) rotates.

6. The assembly of claim 1, wherein, Further comprising a distance sensor (16) arranged in the first gap (115) for sensing the distance between the edge of the pole piece (8) and the electrode (12).

7. The assembly of claim 5, wherein, Further comprising a distance sensor (16) and a controller; The distance sensor (16) is arranged in the first gap (115) for sensing the distance between the edge of the pole piece (8) and the electrode (12); The controller is connected with the driving motor (151) to control the rotation degree of the ball screw (152); The distance sensor (16) is connected with the controller to control the rotation degree of the ball screw (152) so that the distance between the electrode (12) and the pole piece (8) reaches a preset distance.

8. A burr removing apparatus for removing a burr on an edge portion of a pole piece, comprising the burr removing assembly (1) according to any one of claims 1 to 7, characterized in that The device comprises at least two burr removing assemblies (1), and at least one burr removing assembly (1) is arranged on each side of the pole piece (8) in a direction opposite to the first gap (115).

9. The apparatus of claim 8, wherein, Further comprising a passing roller device (5), the passing roller device (5) at least comprises a first passing roller (51) and a second passing roller (52), the first passing roller (51) and the second passing roller (52) drive the movement of the pole piece (8), wherein the burr removing assembly (1) is arranged between the first passing roller (51) and the second passing roller (52), and the pole piece (8) is kept stable when passing through the burr removing assembly (1).

10. The apparatus of claim 9, wherein, Further comprising a front steel roller, wherein the front steel roller and the electrode (12) are respectively electrically connected with a power supply, the pole piece (8) is in contact with the front steel roller, when the electrode (12) generates a tip discharge on the burr (81) at the edge of the pole piece (8), the power supply, the electrode (12), the pole piece (8) and the front steel roller form a conductive loop.

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