Coating apparatus and battery production line

Abstract

The application discloses a coating device and a battery production line. The coating device comprises a back roller assembly, a coating head and a polishing assembly. The back roller assembly comprises a coating roller, which is configured to abut against an electrode piece and move the electrode piece by rotation. The coating head is arranged at one side of the coating roller. The coating head comprises a first lip and a second lip. The first lip and the second lip are arranged along a first direction. The first lip is configured to apply conductive paste to a first area of the electrode piece. The second lip is configured to apply insulating paste to a second area of the electrode piece. The first direction is consistent with the axial direction of the coating roller. The polishing assembly is arranged at one side of the coating roller. The polishing assembly is configured to polish the second area before the second area is coated, so as to increase the roughness of the second area. The polishing assembly polishes the second area on the electrode piece first, increases the roughness, improves the adhesion of the insulating coating on the electrode piece, and reduces the risk of the insulating coating falling off.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, and in particular to a coating equipment and a battery production line. Background Technology

[0002] With the development of new energy sources, more and more fields are adopting new energy as a power source. Due to its advantages such as high energy density, rechargeability, safety, and environmental friendliness, battery devices are widely used in new energy vehicles, consumer electronics, energy storage systems, and other fields.

[0003] The battery assembly includes a housing, a heat exchange component, and multiple battery cells, with the battery cells and heat exchange component respectively housed within the housing. Each battery cell includes an electrode plate coated with a conductive coating and an insulating coating. The insulating coating is located at the edge of the electrode plate along its width; however, the insulating coating is at risk of detachment due to poor adhesion to the electrode plate. Utility Model Content

[0004] In view of the above problems, this application provides a coating equipment and a battery production line, which solves the problem that existing insulating coatings have the risk of falling off due to poor adhesion between them and the electrode sheets.

[0005] The first aspect of this application discloses a coating apparatus, which includes:

[0006] A back roller assembly, including a coating roller configured to allow an electrode sheet to abut against and move by rotation;

[0007] The coating head is arranged at intervals on one side of the coating roller along the radial direction of the coating roller. The coating head includes a first lip and a second lip. The first lip and the second lip are arranged along a first direction. The first lip is configured to coat a conductive paste onto a first region of the electrode, and the second lip is configured to coat an insulating paste onto a second region of the electrode. The first direction is consistent with the axial direction of the coating roller.

[0008] A grinding assembly is located on one side of the coating roller along the radial direction of the coating roller. The grinding assembly and the second lip are spaced apart along the circumferential direction of the coating roller. The grinding assembly is configured to grind the second region before the second region is coated, so as to increase the roughness of the second region.

[0009] During the electrode processing, the second area on the electrode is first polished using a polishing component to increase its roughness. Then, an insulating slurry is applied to the second area through a coating head to form an insulating coating on the second area of ​​the electrode. This improves the adhesion of the insulating coating to the electrode, thereby reducing the risk of the insulating coating peeling off.

[0010] In some embodiments of this application, the number of grinding components is the same as the number of second regions. When there are multiple grinding components and multiple second regions, the multiple grinding components are arranged along the axial direction of the coating roller, and the grinding components are arranged in a one-to-one correspondence with the second regions.

[0011] This configuration increases the number of grinding positions on the electrode by the grinding components, so that the grinding requirements of multiple second areas on the electrode can be met simultaneously, thereby satisfying the coating requirements of the electrode and improving the processing efficiency of the electrode.

[0012] In some embodiments of this application, the grinding assembly is connected to the coating roller, and the grinding assembly is movable relative to the coating roller along at least one of a first direction and a second direction, wherein the arrangement direction of the coating roller and the coating head is consistent with the second direction.

[0013] This configuration, by adjusting the position of the grinding components, can meet the grinding requirements of electrodes of different widths and different grinding depths, thereby improving the coating equipment's adaptability to electrodes.

[0014] In some embodiments of this application, the polishing assembly includes a polishing element, which is circumferentially spaced from a second lip along the coating roller. Along the rotation direction of the coating roller, the polishing element is located upstream of the second lip and configured to polish the second region. By polishing the second region with the polishing element before coating the electrode, the surface roughness of the second region before coating is increased. This increases the adhesion between the insulating slurry and the second region during coating, thereby improving the adhesion between the insulating slurry and the electrode after the insulating coating is formed, and thus reducing the likelihood of the insulating coating peeling off.

[0015] In some embodiments of this application, the polishing assembly further includes an adjustment mechanism disposed on the coating head and connected to the polishing component. Along a first direction and a second direction, the adjustment mechanism can drive the polishing component to move relative to the coating roller.

[0016] By adjusting the position of the grinding part in the first direction using the adjustment mechanism, the grinding requirements of electrodes with different widths can be met. By adjusting the position of the grinding part in the second direction using the adjustment mechanism, the grinding requirements of electrodes with different grinding depths can be met. This setup effectively improves the adaptability of the coating equipment.

[0017] In some embodiments of this application, the travel distance of the grinding element along the second direction is between 1 micrometer and 10 micrometers. This configuration, while satisfying different grinding depths of the electrode, reduces the impact on the electrode's toughness, thereby lowering the possibility of electrode breakage.

[0018] In some embodiments of this application, a through-channel is provided on the coating head. Along a second direction, the through-channel is connected to opposite sides of the coating head. An adjustment mechanism is inserted into the through-channel and can move relative to the through-channel in a first direction. Along the second direction, opposite sides of the adjustment mechanism protrude from the through-channel. The side of the adjustment mechanism facing the coating roller is connected to a grinding component. This arrangement allows part of the adjustment mechanism to be housed within the through-channel of the coating head, reducing the space occupied by the grinding component and facilitating the miniaturization of the coating equipment.

[0019] In some embodiments of this application, the adjustment mechanism includes:

[0020] An adjusting sleeve, at least a portion of which is inserted into the insertion channel and is movable relative to the insertion channel in a first direction;

[0021] An adjusting rod is inserted into and drivenly connected to an adjusting sleeve. Along the second direction, the adjusting rod includes a first end and a second end arranged opposite to each other. The first end is connected to the grinding component, and the second end is at least driven by an external force to move the grinding component in the second direction. By manipulating the position of the adjusting sleeve relative to the through-channel in the first direction, the position of the grinding component in the first direction can be adjusted, thus meeting the grinding requirements of electrode sheets of different widths. By manipulating the adjusting rod, the position of the grinding component in the second direction can be adjusted, thus meeting the grinding requirements of electrode sheets of different grinding depths. The adjusting mechanism formed by the adjusting sleeve and the adjusting rod is structurally simple, easy to process and manufacture, and can effectively reduce manufacturing costs.

[0022] In some embodiments of this application, the adjusting rod is threadedly connected to the adjusting sleeve, and a groove is provided on the side of the coating head facing the coating roller, the groove extending along the second direction. The adjusting mechanism further includes:

[0023] An adjusting seat is rotatably connected to the first end, and the grinding part is mounted on the adjusting seat;

[0024] A retaining rod is provided, one end of which is slidably connected to an adjusting seat, and the other end of which is slidably disposed in a sliding groove. The retaining rod is fixed relative to the adjusting seat in a first direction and is slidable relative to the adjusting seat in a second direction.

[0025] The adjusting rod is threadedly connected to the adjusting sleeve. This design improves the accuracy of position adjustment of the grinding workpiece in the second direction, thereby enhancing the processing accuracy of the electrode sheet.

[0026] In some embodiments of this application, the grinding element is a grinding wheel, which is rotatably mounted on the adjusting seat. The adjusting mechanism also includes a driving element, which is mounted on the adjusting seat and connected to the grinding wheel in a transmission manner. The rotation axis of the grinding wheel is parallel to the rotation axis of the coating roller, and the rotation direction of the grinding wheel is consistent with the rotation direction of the coating roller.

[0027] By setting the grinding component as a grinding wheel and connecting it to the drive component, the second area of ​​the electrode sheet is ground by the rotation of the grinding wheel, thereby improving the grinding efficiency and thus improving the processing efficiency of the electrode sheet.

[0028] In some embodiments of this application, the linear velocity of the grinding wheel is greater than that of the coating roller. This arrangement facilitates the ejection of grinding debris, reducing debris accumulation.

[0029] In some embodiments of this application, the adjusting sleeve includes a sleeve body and an end plate. At least part of the sleeve body is disposed in the through-channel, and the end plate is disposed on the side of the coating head away from the coating roller and connected to the sleeve body. Along the circumference of the sleeve body, the side of the end plate away from the coating head is provided with a rotation scale.

[0030] The adjusting rod includes a connected rod body and an adjusting wheel. The rod body is inserted into the sleeve body and the two are threaded together. The end of the rod body away from the adjusting wheel is connected to the grinding part and forms the first end. The adjusting wheel is set on the side of the end plate away from the coating head and forms the second end. The adjusting wheel is provided with a rotation mark, which can be selectively aligned with any scale line in the rotation scale.

[0031] This setup improves the accuracy of positional adjustment of the workpiece in the second direction, thereby enhancing the processing accuracy of the electrode sheet.

[0032] In some embodiments of this application, the coating apparatus further includes at least one fastener connected to the coating head. The fastener includes a locked state and an unlocked state. In the locked state, the adjustment mechanism is clamped and fixed in the through-channel. In the unlocked state, the adjustment mechanism is movable relative to the through-channel in a second direction.

[0033] This configuration, by controlling the fasteners, enables the adjustment mechanism to switch between a fixed state and a free state, thereby effectively meeting the grinding requirements of the grinding components for the electrode sheets.

[0034] In some embodiments of this application, a first translation scale is provided on the side of the coating head away from the coating roller. Multiple first scale lines of the first translation scale are arranged along a first direction, and the adjustment mechanism can selectively align with any one of the multiple first scale lines. This arrangement improves the accuracy of adjusting the position of the workpiece in the first direction, thereby improving the grinding accuracy of the electrode sheet.

[0035] In some embodiments of this application, a second translation scale is provided on the side of the coating head facing the coating roller. Multiple second scale lines of the second translation scale are arranged along a first direction, and the adjustment mechanism can selectively align with any one of the multiple second scale lines. This arrangement further improves the accuracy of adjusting the position of the grinding component in the first direction, and further improves the grinding accuracy of the electrode sheet.

[0036] The second aspect of this application discloses a battery production line, which includes the coating equipment described above.

[0037] During the electrode processing, the coating equipment in the battery production line uses a grinding component to first grind the second area on the electrode, increasing the roughness of the second area. Then, an insulating slurry is applied to the second area through the coating head, forming an insulating coating on the second area of ​​the electrode. This improves the adhesion of the insulating coating to the electrode, thereby reducing the risk of the insulating coating peeling off.

[0038] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0039] Figure 1 A schematic diagram of the structure of the electrode sheet processed by the coating equipment according to this application is shown.

[0040] Figure 2 A schematic diagram of the structure of a coating apparatus according to one embodiment of this application is shown.

[0041] Figure 3 for Figure 2 A cross-sectional view of the coating equipment at position AA shown;

[0042] Figure 4 for Figure 2 A second-view structural schematic diagram of the coating equipment shown (coating rollers not shown);

[0043] Figure 5 for Figure 4 A schematic diagram of the coating equipment shown from another perspective.

[0044] The attached figures are labeled as follows:

[0045] 100. Coating equipment;

[0046] 200, Electrode; 201, First Region; 202, Second Region;

[0047] 10. Back roller assembly;

[0048] 11. Coating roller;

[0049] 20. Coating head;

[0050] 21. Through passage; 22. First translation scale; 23. First lip; 24. Second lip; 25. Slide groove; 26. Second translation scale;

[0051] 30. Grinding components;

[0052] 31. Adjusting sleeve; 311. End plate; 3111. Rotation scale; 312. Sleeve body; 32. Adjusting rod; 321. Adjusting wheel; 322. Rod body; 33. Grinding component; 34. Driving component; 35. Adjusting seat; 36. Holding rod;

[0053] 40. Fasteners;

[0054] X, the first direction; Y, the second direction. Detailed Implementation

[0055] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0056] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0057] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0058] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0059] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0060] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0061] In the description of the embodiments of this application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0062] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0063] Currently, judging from market trends, the application of battery devices is becoming increasingly widespread. Battery devices are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, but also widely applied in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of battery device applications, market demand is also constantly increasing.

[0064] The battery assembly includes a housing, a heat exchange component, and multiple battery cells, with the battery cells and heat exchange component respectively housed within the housing. Each battery cell includes an electrode plate coated with a conductive coating and an insulating coating. The insulating coating is located at the edge of the electrode plate along its width; however, the insulating coating is at risk of detachment due to poor adhesion to the electrode plate.

[0065] In this application, the coating equipment includes a back roller assembly, coating heads, and a grinding assembly. The back roller assembly includes a coating roller, which is configured to allow an electrode sheet to abut against and move by rotation. Along the radial direction of the coating roller, coating heads are spaced apart on one side of the coating roller. Each coating head includes a first lip and a second lip, which are arranged along a first direction. The first lip is configured to coat a conductive paste onto a first region of the electrode sheet, and the second lip is configured to coat an insulating paste onto a second region of the electrode sheet. The first direction is consistent with the axial direction of the coating roller. Along the radial direction of the coating roller, the grinding assembly is located on one side of the coating roller and is configured to grind the second region before coating it, thereby increasing the roughness of the second region. During the electrode processing, the second area on the electrode is first polished using a polishing component, which increases the roughness of the second area. Then, an insulating slurry is applied to the second area through a coating head, thereby forming an insulating coating on the second area of ​​the electrode. This improves the adhesion of the insulating coating to the electrode, thus reducing the risk of the insulating coating peeling off.

[0066] In some embodiments of this application, the battery cell includes an electrode assembly, which includes a positive electrode sheet, a separator and a negative electrode sheet stacked together. The electrode assembly can be a wound structure, a stacked structure, or a hybrid structure of wound and stacked.

[0067] Taking the negative electrode as an example, during the processing of the negative electrode, cathode paste (conductive paste, such as artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials, and lithium titanate, etc.) is uniformly coated on the substrate of the negative electrode (such as aluminum foil or copper foil, etc.), and a conductive coating is formed by drying. Insulating paste (such as borosilicate) is coated on the edges of the substrate along its width, and the insulating paste forms an insulating coating after drying. This insulating coating forms a protective film at the edge of the negative electrode, isolating the electrolyte from direct contact with the negative electrode and reducing corrosion. Simultaneously, the insulating coating effectively inhibits side reactions between the substrate and the electrolyte, reduces gas generation, minimizes the cyclic expansion of the battery cell, thereby improving the cycle stability and lifespan of the battery cell and reducing the risk of thermal runaway.

[0068] like Figures 1 to 5As shown, in some embodiments of this application, a coating apparatus 100 is proposed. The coating apparatus 100 includes a back roller assembly 10, a coating head 20, and a polishing assembly 30. The back roller assembly 10 includes a coating roller 11, which is configured to allow an electrode 200 to abut against and move by rotation. Along the radial direction of the coating roller 11, the coating head 20 is disposed on one side of the coating roller 11. The coating head 20 includes a first lip 23 and a second lip 24, which are arranged along a first direction X. The electrode 200 is configured to coat a conductive paste onto the first region 201 of the electrode 200, and the second lip 24 is configured to coat an insulating paste onto the second region 202 of the electrode 200. The first direction X is consistent with the axial direction of the coating roller 11. Along the radial direction of the coating roller 11, the grinding assembly 30 is disposed on one side of the coating roller 11. The grinding assembly 30 and the second lip 24 are spaced apart along the circumferential direction of the coating roller 11. The grinding assembly 30 is configured to grind the second region 202 before it is coated, so as to increase the roughness of the second region 202.

[0069] Specifically, the back roller assembly 10 includes multiple rollers, each of which is cylindrical and is arranged in parallel at intervals. The multiple rollers form a conveying path for the electrode 200, which is curved. The electrode 200 to be coated enters the conveying path from one end and is output from the other end. On the conveying path, the electrode 200 abuts against the outer circumferential surface of the roller. The electrode 200 is conveyed by the rotation of the roller around its own axis.

[0070] Among the multiple rollers, there is a coating roller 11, and a coating head 20 is arranged adjacent to the coating roller 11. The outer peripheral surface of the coating roller 11 is spaced apart from the lip of the coating head 20 (the outlet is used to output the coating slurry). When the electrode 200 passes between the coating roller 11 and the coating head 20, the slurry output from the lip of the coating head 20 is coated onto the electrode 200. After drying and other operations, the slurry is cured on the surface of the electrode 200 to form a coating.

[0071] The coating head 20 has a lip opening on one side facing the outer peripheral surface of the coating roller 11. The lip opening includes a first lip opening 23 and a second lip opening 24. The first lip opening 23 and the second lip opening 24 are arranged along the first direction X. The first lip opening 23 is arranged opposite to the first region 201 of the electrode 200 and is used to coat the conductive paste onto the electrode 200. The second lip opening 24 is arranged opposite to the second region 202 of the electrode 200 and is used to coat the insulating paste onto the electrode 200.

[0072] The grinding assembly 30 is arranged adjacent to the coating roller 11, and the grinding assembly 30 is located upstream of the coating head 20 (that is, the electrode 200 guided by the coating roller 11 needs to pass through the grinding assembly 30 first, and then through the coating head 20). The grinding assembly 30 is arranged opposite to the second region 202 on the electrode 200. When the electrode 200 is conveyed under the guidance of the coating roller 11, when the electrode 200 passes the position of the grinding component 30, the grinding component 30 grinds the second region 202 of the electrode 200 (grinding refers to the grinding component 30 generating friction with the second region 202 of the electrode 200, and using friction to cause uneven shedding of the surface material of the second region 202). The roughness of the second region 202 after grinding is increased compared with that before grinding. When the electrode 200 after grinding is conveyed to the position of the second lip 24 of the coating head 20, the insulating slurry output through the second lip 24 is coated on the second region 202. After drying, the coated insulating slurry forms an insulating coating.

[0073] In this application, during the processing of the electrode 200, the second region 202 on the electrode 200 is first polished using the polishing component 30, which increases the roughness of the second region 202. Then, the coating head 20 applies insulating slurry to the second region 202, forming an insulating coating on the second region 202 of the electrode 200. This improves the adhesion of the insulating coating to the electrode 200, thereby reducing the risk of the insulating coating falling off.

[0074] In some embodiments of this application, such as Figure 2 , Figure 4 and Figure 5 As shown, the number of polishing components 30 is the same as that of the second region 202. When there are multiple polishing components 30 and multiple second regions 202, the multiple polishing components 30 are arranged along the axial direction of the coating roller 11, and the polishing components 30 and the second region 202 are arranged in a one-to-one correspondence.

[0075] Specifically, the second region 202 is located at the edge of the electrode 200 in the width direction (consistent with the axial direction of the coating roller 11). The electrode 200 has two edges in the width direction, that is, an electrode 200 has two second regions 202, and the first region 201 is located between the two second regions 202.

[0076] For a single electrode 200, there are two polishing components 30 (and two second lips 24) in the width direction of the electrode 200, and each polishing component 30 corresponds to a second region 202 setting.

[0077] When a substrate can be processed into multiple electrode sheets 200 at the same time (a substrate has a structure of multiple electrode sheets 200 in its width direction (axial direction of the coating roller 11), multiple electrode sheets 200 can be formed after one coating, and then a single electrode sheet 200 can be formed after cutting), two grinding components 30 are provided at the position of each electrode sheet 200 of the substrate to achieve one-time grinding, thereby improving grinding efficiency.

[0078] By setting multiple grinding components 30, the number of grinding positions of the grinding components 30 on the electrode 200 can be increased, so that the grinding requirements of multiple second regions 202 on the electrode 200 can be met at the same time, thereby meeting the coating requirements of the electrode 200 and improving the processing efficiency of the electrode 200.

[0079] In some embodiments of this application, such as Figure 3 or Figure 5 As shown, the grinding assembly 30 is connected to the coating roller 11. The grinding assembly 30 can move relative to the coating roller 11 along at least one of the first direction X and the second direction Y. The arrangement direction of the coating roller 11 and the coating head 20 is consistent with the second direction Y.

[0080] Specifically, the first direction X is consistent with the axial direction of the coating roller 11, and the second direction Y is consistent with the arrangement direction of the coating roller 11 and the coating head 20.

[0081] When the polishing component 30 can move along the first direction X, when the position of the second region 202 of the electrode 200 changes in the first direction X, the position of the polishing component 30 is adjusted in the first direction X so that the position of the polishing component 30 and the second region 202 are set relative to each other, thereby meeting the polishing requirements of the second region 202. In this way, the polishing requirements of electrodes 200 with different widths can be met.

[0082] When the polishing component 30 can move along the second direction Y, it can approach or move away from the electrode 200. When the polishing component 30 is close to the electrode 200, the polishing depth of the electrode 200 is greater; when the polishing component 30 is far from the electrode 200, the polishing depth of the electrode 200 is smaller. By adjusting the position of the polishing component 30 in the second direction Y, the polishing depth of the electrode 200 can be adjusted, thus meeting the polishing requirements of different depths.

[0083] In this application, by adjusting the position of the grinding component 30, the grinding requirements of electrode sheets 200 with different widths and different grinding depths can be met, thereby improving the adaptability of the coating equipment 100 to the electrode sheets 200.

[0084] In some embodiments of this application, such as Figure 3As shown, the polishing assembly 30 includes a polishing element 33, the polishing element 33 and the second lip 24 are arranged circumferentially along the coating roller 11, and along the rotation direction of the coating roller 11, the polishing element 33 is located upstream of the second lip 24 and is configured to polish the second region 202.

[0085] Specifically, the grinding element 33 and the second lip 24 are arranged circumferentially along the coating roller 11, and the grinding element 33 and the second lip 24 are spaced apart along the circumferential direction of the coating roller 11. The grinding element 33 is located on the upstream side of the second lip 24 (the upstream side means that the electrode sheet 200 conveyed by the coating roller 11 needs to pass the grinding element 33 first and then the second lip 24). The grinding element 33 can be located below the second lip 24, or it can be located on opposite sides of the second lip 24 on the coating roller 11.

[0086] In this application, the grinding tool 33 is used to grind the second region 202 before the electrode 200 is coated, thereby increasing the surface roughness of the second region 202 before coating. This increases the adhesion between the insulating slurry and the second region 202 during coating, thereby improving the adhesion between the insulating slurry and the electrode 200 after the insulating coating is formed, and thus reducing the possibility of the insulating coating falling off.

[0087] It should be understood that the grinding element 33 abuts against the electrode 200 conveyed by the coating roller 11, and the surface roughness of the grinding element 33 is greater than that of the electrode 200, so that the surface roughness of the second region 202 of the electrode 200 can be increased after the electrode 200 is ground by the grinding element 33.

[0088] It should be noted that the surface roughness of the grinding part 33 can be 200 mesh. Setting the surface roughness of the grinding part 33 to 200 mesh can meet the grinding requirements of the second region 202 of the electrode 200, thereby improving the adhesion between the insulating coating and the electrode 200 and reducing the situation of the insulating coating falling off.

[0089] In some embodiments of this application, such as Figures 3 to 5 As shown, the polishing assembly 30 also includes an adjustment mechanism, which is located on the coating head 20 and connected to the polishing component 33. Along the first direction X and the second direction Y, the adjustment mechanism can drive the polishing component 33 to move relative to the coating roller 11.

[0090] Specifically, the first direction X is consistent with the axial direction of the coating roller 11, the width direction of the electrode 200 is consistent with the first direction X, the second direction Y is the arrangement direction of the coating roller 11 and the coating head 20, and the thickness direction of the electrode 200 intersects with the second direction Y.

[0091] When the width of the electrode 200 changes, the position of the second region 202 on the electrode 200 will change. The position of the grinding part 33 in the first direction X is adjusted by the adjustment mechanism to meet the grinding requirements of the electrode 200 with different widths.

[0092] When the grinding depth of the electrode 200 needs to be adjusted, the grinding component 33 is driven in the second direction Y by the adjustment mechanism, so that the grinding component 33 moves closer to or further away from the electrode 200, thereby realizing the adjustment of the position of the grinding component 33 in the second direction Y to meet the grinding requirements of the electrode 200 with different grinding depths. This setting effectively improves the adaptability of the coating equipment 100.

[0093] In some embodiments of this application, such as Figure 3 or Figure 5 As shown, the travel distance of the grinding part 33 along the second direction Y is between 1 micrometer and 10 micrometers.

[0094] Specifically, the grinding component 33 is connected to the adjustment mechanism. Driven by the adjustment mechanism, the grinding component 33 can move in the second direction Y, thereby allowing the grinding component 33 to move closer to or further away from the electrode 200. This adjusts the grinding depth of the grinding component 33 on the electrode 200. By setting the travel distance of the grinding component 33 in the second direction Y, the impact on the toughness of the electrode 200 is reduced while satisfying different grinding depths of the electrode 200, thus reducing the possibility of electrode 200 breakage.

[0095] It should be understood that the travel distance of the polishing component 33 refers to the distance that the polishing component 33 travels from its initial position (the position furthest from the electrode 200) toward the electrode 200 in the first direction X. That is, the maximum travel distance of the polishing component 33 from its initial position toward the electrode 200 is 1 micrometer, and the minimum travel distance is 10 micrometers.

[0096] In some embodiments of this application, such as Figure 2 As shown, the coating head 20 has a through-channel 21. Along the second direction Y, the through-channel 21 is connected to the opposite sides of the coating head 20. The adjustment mechanism is inserted into the through-channel 21 and can move relative to the through-channel 21 in the first direction X. Along the second direction Y, the opposite sides of the adjustment mechanism protrude from the through-channel 21. The side of the adjustment mechanism facing the coating roller 11 is connected to the grinding component 33.

[0097] Specifically, the through-channel 21 is formed on the coating head 20. Along the second direction Y, the through-channel 21 passes through the opposite sides of the coating head 20. Along the first direction X, the through-channel 21 has a certain length but does not pass through the opposite sides of the coating head 20. The adjustment mechanism is inserted into the through-channel 21, and the opposite ends of the adjustment mechanism in the second direction Y protrude from the through-channel 21. The side of the adjustment mechanism facing the coating roller 11 is connected to the grinding element 33, and the side of the adjustment mechanism away from the coating roller 11 is operated and adjusted by the operator.

[0098] When the position of the grinding part 33 needs to be adjusted in the first direction X, the adjusting mechanism moves relative to the through-channel 21 in the first direction X to move the grinding part 33 to the desired position in the first direction X. When the position of the grinding part 33 needs to be adjusted in the second direction Y, the adjusting mechanism is fixed relative to the through-channel 21, and the adjusting mechanism adjusts the grinding part 33 to the desired position by extending and retracting in the second direction Y.

[0099] In this application, part of the adjustment mechanism is set in the through channel 21 of the coating head 20, which can reduce the space occupied by the grinding component 30 and facilitate the miniaturization of the coating equipment 100.

[0100] In some embodiments of this application, such as Figures 3 to 5 As shown, the adjustment mechanism includes an adjustment sleeve 31 and an adjustment rod 32. At least a portion of the adjustment sleeve 31 passes through the through-channel 21 and is movable relative to the through-channel 21 in the first direction X. The adjustment rod 32 is inserted into the adjustment sleeve 31 and is throttle-connected to it. Along the second direction Y, the adjustment rod 32 includes a first end and a second end arranged opposite to each other. The first end is connected to the grinding element 33, and the second end is at least driven by an external force to move the adjustment rod 32, thereby causing the adjustment rod 32 to move the grinding element 33 in the second direction Y. By controlling the position of the adjustment sleeve 31 relative to the through-channel 21 in the first direction X, the position of the grinding element 33 in the first direction X can be adjusted, thus meeting the grinding requirements of electrode sheets 200 with different widths.

[0101] Specifically, the adjusting sleeve 31 is sleeved on the outside of the adjusting rod 32, and the adjusting sleeve 31 and the adjusting rod 32 are connected by transmission. The first end and the second end of the adjusting rod 32 protrude from the adjusting sleeve 31. The first end is connected to the grinding part 33, and the second end is used by external force to adjust the adjusting rod 32.

[0102] When it is necessary to adjust the position of the grinding part 33 in the first direction X, the adjusting sleeve 31 can be driven by external force to slide relative to the through channel 21 in the first direction X. The driving sleeve drives the grinding part 33 to adjust its position in the first direction X through the adjusting rod 32.

[0103] When it is necessary to adjust the position of the grinding part 33 in the second direction Y, the second end of the adjusting rod 32 can be driven by external force, so that the adjusting rod 32 moves relative to the adjusting sleeve 31 in the second direction Y, thereby driving the grinding part 33 to adjust its position in the second direction Y.

[0104] In this application, the adjusting mechanism formed by the adjusting sleeve 31 and the adjusting rod 32 has a relatively simple structure, is easy to process and manufacture, and can effectively reduce manufacturing costs.

[0105] It should be noted that the adjusting rod 32 and the adjusting sleeve 31 are connected to each other, and the connection method can be threaded connection or sliding connection, etc.

[0106] Additionally, the adjusting seat 35 is provided with a sliding hole extending along the second direction Y. A slider is slidably disposed within the sliding hole, and one end of the retaining rod 36 is used for hinged connection of the slider. When the adjusting seat 35 drives the grinding piece 33 to move in the second direction Y, the slider slides relative to the sliding hole, so that the adjusting seat 35 can drive the grinding piece 33 to move in the second direction Y.

[0107] In some embodiments of this application, such as Figure 2 or Figure 5 As shown, the adjusting rod 32 is threadedly connected to the adjusting sleeve 31. The coating head 20 has a groove 25 on the side facing the coating roller 11. The groove 25 extends along the second direction Y. The adjusting mechanism also includes an adjusting seat 35 and a retaining rod 36. The adjusting seat 35 is rotatably connected to the first end. The grinding part 33 is disposed on the adjusting seat 35. One end of the retaining rod 36 is slidably connected to the adjusting seat 35. The other end of the adjusting rod 32 is slidably disposed in the groove 25. The retaining rod 36 is fixed relative to the adjusting seat 35 in the first direction X and can slide relative to the adjusting seat 35 in the second direction Y.

[0108] Specifically, the adjusting seat 35 is located outside the through-channel 21 of the coating head 20, the grinding element 33 is disposed on the adjusting seat 35, the adjusting seat 35 is connected to the first end of the adjusting rod 32, the first end can rotate relative to the adjusting seat 35, one end of the retaining rod 36 is connected to the adjusting seat 35, and the other end is slidably disposed in the groove 25 of the coating head 20. In the first direction X, the retaining rod 36 and the adjusting seat 35 are relatively fixed (i.e., no relative displacement can be generated), and in the second direction Y, the retaining rod 36 and the adjusting seat 35 can slide relative to each other.

[0109] When it is necessary to adjust the position of the grinding part 33 in the first direction X, the adjusting sleeve 31 can be driven by external force to slide relative to the through channel 21 in the first direction X. The adjusting sleeve 31 drives the adjusting rod 32, the adjusting seat 35, the retaining rod 36 and the grinding part 33 to move in the first direction X. The retaining rod 36 slides relative to the slide groove 25, thereby driving the grinding part 33 to adjust its position in the first direction X.

[0110] When it is necessary to adjust the position of the grinding part 33 in the second direction Y, the adjusting rod 32 can be driven by external force to rotate relative to the adjusting sleeve 31. In the first direction X, the first end of the adjusting rod 32 can move closer to or further away from the coating roller 11 with the electrode 200. By rotating the adjusting rod 32 relative to the adjusting rod 32, the adjusting rod 32 can drive the grinding part 33 to move closer to or further away from the electrode 200 in the first direction X through the adjusting seat 35, thereby realizing the position adjustment of the grinding part 33 in the second direction Y.

[0111] In this application, the adjusting rod 32 is threadedly connected to the adjusting sleeve 31. This configuration can improve the accuracy of adjusting the position of the grinding part 33 in the second direction Y, thereby improving the processing accuracy of the electrode 200.

[0112] In some embodiments of this application, such as Figure 3 As shown, the grinding component 33 is a grinding wheel, which is rotatably mounted on the adjusting seat 35. The adjusting mechanism also includes a driving component 34, which is mounted on the adjusting seat 35 and is connected to the grinding wheel for transmission. The rotation axis of the grinding wheel is parallel to the rotation axis of the coating roller 11, and the rotation direction of the grinding wheel is consistent with the rotation direction of the coating roller 11.

[0113] Specifically, the adjusting seat 35 has a receiving groove, and the grinding wheel is mounted on the adjusting seat 35 via a rotating shaft. A portion of the grinding wheel protrudes from the outer side of the receiving groove along the radial direction of the grinding wheel, and the outer circumferential surface of the grinding wheel is used to grind the electrode sheet 200. The driving component 34 is mounted on the adjusting seat 35, and its drive shaft is connected to the rotating shaft. The driving component 34 drives the grinding wheel to rotate relative to the adjusting seat 35 via the rotating shaft.

[0114] It should be understood that the driving component 34 is a motor, which can be a stepper motor or a regular motor, etc.

[0115] It should be noted that the width of the grinding wheel is smaller than the width of the second region 202 of the electrode 200. For example, the width of the grinding wheel is 19.5 mm and the width of the second region 202 of the electrode 200 is 20 mm. In this way, the grinding wheel can reduce the adverse effects on the first region 201 caused by grinding.

[0116] In addition, the diameter of the grinding wheel is smaller than the diameter of the coating roller 11. For example, the diameter of the grinding wheel is 600mm. In this way, while meeting the grinding requirements, the volume of the grinding wheel can be reduced, so that the volume of the coating equipment 100 can be reduced.

[0117] The grinding component 33 is configured as a grinding wheel and is connected to the drive component 34 for transmission. The rotation direction of the grinding wheel is set to be consistent with the rotation direction of the coating roller 11. In this way, the second region 202 of the electrode 200 can be ground by the rotation of the grinding wheel, thereby improving the grinding efficiency and improving the processing efficiency of the electrode 200.

[0118] In some embodiments of this application, the linear velocity of the grinding wheel is greater than the linear velocity of the coating roller 11.

[0119] Specifically, the rotation direction of the grinding wheel is the same as that of the coating roller 11, so that the rotation of the grinding wheel can be used to grind the electrode 200 conveyed by the coating roller 11. In this application, the linear velocity of the grinding wheel is greater than the linear velocity of the coating roller 11 (for example, the ratio of the linear velocity of the grinding wheel to the linear velocity of the coating roller 11 is 2:1, etc.), that is, the rotational speed of the grinding wheel is greater than the rotational speed of the coating roller 11. This setting makes it easier to throw off the grinding debris, reduce the accumulation of debris, and thus reduce the amount of debris adhering to the electrode 200, thereby improving the processing quality of the electrode 200.

[0120] In some embodiments of this application, such as Figure 2 As shown, the adjusting sleeve 31 includes a sleeve body 312 and an end plate 311. At least part of the sleeve body 312 is disposed in the through channel 21. The end plate 311 is disposed on the side of the coating head 20 away from the coating roller 11 and is connected to the sleeve body 312. Along the circumference of the sleeve body 312, the side of the end plate 311 away from the coating head 20 is provided with a rotation scale 3111.

[0121] The adjusting rod 32 includes a rod body 322 and an adjusting wheel 321 connected together. The rod body 322 is inserted into the sleeve 312 and the two are threaded together. The end of the rod body 322 away from the adjusting wheel 321 is connected to the grinding part 33 and forms the first end. The adjusting wheel 321 is set on the side of the end plate 311 away from the coating head 20 and forms the second end. The adjusting wheel 321 is provided with a rotation mark, which can be selectively aligned with any scale line in the rotation scale 3111.

[0122] Specifically, when the position of the grinding part 33 needs to be adjusted in the second direction Y, an external force is used to operate the adjusting wheel 321. The adjusting wheel 321 drives the rod 322 to rotate relative to the sleeve 312. By observing the corresponding position of the rotation mark on the adjusting wheel 321 and the rotation scale 3111 of the short plate, the adjustment of the position of the grinding part 33 in the second direction Y can be intuitively controlled. This setting can improve the accuracy of the position adjustment of the grinding part 33 in the second direction Y, so as to improve the processing accuracy of the electrode 200.

[0123] In some embodiments of this application, such as Figures 2 to 5 As shown, the coating apparatus 100 also includes at least one fastener 40 connected to the coating head 20. The fastener 40 includes a locked state and an unlocked state. In the locked state, the adjustment mechanism is clamped and fixed in the through-channel 21. In the unlocked state, the adjustment mechanism can move relative to the through-channel 21 in the second direction Y.

[0124] Specifically, in this application, the coating head 20 has a threaded hole at its bottom, which extends through the through-channel 21. The fastener 40 is, for example, a bolt, with its stud threaded into the threaded hole. When the bolt is tightened, the through-channel 21 undergoes elastic deformation, narrowing the channel and clamping the adjusting mechanism within it, thus locking it in place. When the bolt is loosened, the through-channel 21 returns to its elastic deformation, allowing the adjusting mechanism to move relative to the through-channel 21 in the first direction X, thus unlocking it.

[0125] With this configuration, the adjustment mechanism can be switched between a fixed state and a free state by controlling the fastener 40, thereby effectively meeting the grinding requirements of the grinding part 33 and the electrode 200.

[0126] It should be understood that the setting position of the fastener 40 does not interfere with the position adjusted by the adjustment mechanism along the first direction X.

[0127] In addition, the number of fasteners 40 can be one, two, three, four, five, six, etc. When there are multiple fasteners 40 (two or more), the multiple fasteners 40 are set separately.

[0128] In some embodiments of this application, such as Figure 2 As shown, the coating head 20 has a first translation scale 22 on the side opposite to the coating roller 11. Multiple first scale lines of the first translation scale 22 are arranged along the first direction X. The adjustment mechanism can selectively align with any one of the multiple first scale lines.

[0129] Specifically, when it is necessary to adjust the position of the grinding part 33 in the first direction X, the fastener 40 is set to the unlocked state, driving the adjustment mechanism to move relative to the through channel 21 in the first direction X. During the movement, the alignment of the adjustment mechanism with the first translation scale 22 is referenced, thereby allowing for intuitive adjustment of the position of the grinding part 33 in the first direction X. This setting improves the accuracy of adjusting the position of the grinding part 33 in the first direction X, thereby improving the grinding accuracy of the electrode 200.

[0130] In some embodiments of this application, such as Figure 4 As shown, the coating head 20 has a second translation scale 26 on the side facing the coating roller 11. Multiple second scale lines of the second translation scale 26 are arranged along the first direction X. The adjustment mechanism can selectively align with any one of the multiple second scale lines.

[0131] Specifically, when it is necessary to adjust the position of the grinding part 33 in the first direction X, the fastener 40 is set to the unlocked state, and the adjustment mechanism is driven to move relative to the through channel 21 in the first direction X. During the movement, the alignment of the adjustment mechanism with the first translation scale 22 and the second translation scale 26 is referenced respectively. In this way, the position of the grinding part 33 in the first direction X can be adjusted intuitively, reducing the possibility of the adjustment mechanism tilting. This setting can further improve the accuracy of the position adjustment of the grinding part 33 in the first direction X, and further improve the grinding accuracy of the electrode 200.

[0132] The second aspect of this application discloses a battery production line, which includes the coating equipment 100 as described above.

[0133] During the processing of the electrode 200, the coating equipment 100 of the battery production line first uses the grinding component 30 to grind the second region 202 on the electrode 200, increasing the roughness of the second region 202. Then, the coating head 20 applies insulating slurry to the second region 202, forming an insulating coating on the second region 202 of the electrode 200. This improves the adhesion of the insulating coating to the electrode 200, thereby reducing the risk of the insulating coating falling off.

[0134] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application.

[0135] In the embodiments of this application, such as Figures 1 to 5As shown, this application proposes a coating apparatus 100, which includes a back roller assembly 10, a coating head 20, and a polishing assembly 30. The back roller assembly 10 includes a coating roller 11, which is configured to allow an electrode 200 to abut against and move by rotation. Along the radial direction of the coating roller 11, the coating head 20 is disposed on one side of the coating roller 11. The coating head 20 includes a first lip 23 and a second lip 24, which are arranged along a first direction X. The first lip 23 is configured to... Conductive paste is coated onto the first region 201 of the electrode 200, and the second lip 24 is configured to coat the second region 202 of the electrode 200 with insulating paste. The first direction X is consistent with the axial direction of the coating roller 11. Along the radial direction of the coating roller 11, the grinding assembly 30 is disposed on one side of the coating roller 11. The grinding assembly 30 and the second lip 24 are spaced apart along the circumferential direction of the coating roller 11. The grinding assembly 30 is configured to grind the second region 202 before it is coated to increase the roughness of the second region 202.

[0136] Furthermore, the number of polishing components 30 is the same as that of the second region 202. When there are multiple polishing components 30 and multiple second regions 202, the multiple polishing components 30 are arranged along the axial direction of the coating roller 11, and the polishing components 30 are arranged in a one-to-one correspondence with the second region 202.

[0137] Furthermore, the grinding assembly 30 is connected to the coating roller 11, and the grinding assembly 30 is movable relative to the coating roller 11 along at least one of the first direction X and the second direction Y. The arrangement direction of the coating roller 11 and the coating head 20 is consistent with the second direction Y.

[0138] Furthermore, the polishing assembly 30 includes a polishing element 33, which is circumferentially spaced from the second lip 24 along the coating roller 11. Along the rotation direction of the coating roller 11, the polishing element 33 is located upstream of the second lip 24 and is configured to polish the second region 202.

[0139] Furthermore, the polishing assembly 30 also includes an adjustment mechanism, which is located on the coating head 20 and connected to the polishing component 33. Along the first direction X and the second direction Y, the adjustment mechanism can drive the polishing component 33 to move relative to the coating roller 11.

[0140] Furthermore, along the second direction Y, the travel distance of the grinding element 33 is between 1 micrometer and 10 micrometers.

[0141] Furthermore, the coating head 20 is provided with a through channel 21. Along the second direction Y, the through channel 21 is connected to the opposite sides of the coating head 20. The adjustment mechanism is inserted into the through channel 21 and can move relative to the through channel 21 in the first direction X. Along the second direction Y, the opposite sides of the adjustment mechanism protrude from the through channel 21. The side of the adjustment mechanism facing the coating roller 11 is connected to the grinding component 33.

[0142] Furthermore, the adjustment mechanism includes an adjustment sleeve 31 and an adjustment rod 32. At least part of the adjustment sleeve 31 passes through the passage 21 and is movable relative to the passage 21 in the first direction X. The adjustment rod 32 is inserted into the adjustment sleeve 31 and is connected to the adjustment sleeve 31 in a transmission manner. Along the second direction Y, the adjustment rod 32 includes a first end and a second end arranged opposite to each other. The first end is connected to the grinding member 33, and the second end is at least driven by an external force to drive the adjustment rod 32 so that the adjustment rod 32 drives the grinding member 33 to move in the second direction Y.

[0143] Furthermore, the adjusting rod 32 is threadedly connected to the adjusting sleeve 31. The coating head 20 is provided with a groove 25 on the side facing the coating roller 11. The groove 25 extends along the second direction Y. The adjusting mechanism also includes an adjusting seat 35 and a retaining rod 36. The adjusting seat 35 is rotatably connected to the first end. The grinding part 33 is disposed on the adjusting seat 35. One end of the retaining rod 36 is slidably connected to the adjusting seat 35. The other end of the adjusting rod 32 is slidably disposed in the groove 25. The retaining rod 36 is fixed relative to the adjusting seat 35 in the first direction X, and the retaining rod 36 can slide relative to the adjusting seat 35 in the second direction Y.

[0144] Furthermore, the grinding component 33 is a grinding wheel, which is rotatably mounted on the adjusting seat 35. The adjusting mechanism also includes a driving component 34, which is mounted on the adjusting seat 35 and is connected to the grinding wheel for transmission. The rotation axis of the grinding wheel is parallel to the rotation axis of the coating roller 11, and the rotation direction of the grinding wheel is consistent with the rotation direction of the coating roller 11.

[0145] Furthermore, the linear velocity of the grinding wheel is greater than the linear velocity of the coating roller 11.

[0146] Furthermore, the adjusting sleeve 31 includes a sleeve body 312 and an end plate 311. At least part of the sleeve body 312 is disposed in the through channel 21. The end plate 311 is disposed on the side of the coating head 20 away from the coating roller 11 and is connected to the sleeve body 312. Along the circumference of the sleeve body 312, the side of the end plate 311 away from the coating head 20 is provided with a rotation scale 3111. The adjusting rod 32 includes a rod body 322 and an adjusting wheel 321 connected together. The rod body 322 is inserted into the sleeve body 312 and the two are threaded together. The end of the rod body 322 away from the adjusting wheel 321 is connected to the grinding part 33 and forms a first end. The adjusting wheel 321 is disposed on the side of the end plate 311 away from the coating head 20 and forms a second end. The adjusting wheel 321 is provided with a rotation mark, which can be selectively aligned with any scale line in the rotation scale 3111.

[0147] Furthermore, the coating apparatus 100 also includes at least one fastener 40 connected to the coating head 20. The fastener 40 includes a locked state and an unlocked state. In the locked state, the adjustment mechanism is clamped and fixed in the through-channel 21. In the unlocked state, the adjustment mechanism is movable relative to the through-channel 21 in the second direction Y.

[0148] Furthermore, the coating head 20 is provided with a first translation scale 22 on the side opposite to the coating roller 11. Multiple first scale lines of the first translation scale 22 are arranged along the first direction X. The adjustment mechanism can selectively align with any one of the multiple first scale lines.

[0149] Furthermore, the coating head 20 has a second translation scale 26 on the side facing the coating roller 11. Multiple second scale lines of the second translation scale 26 are arranged along the first direction X. The adjustment mechanism can selectively align with any one of the multiple second scale lines.

[0150] In this application, during the processing of the electrode 200, the second region 202 on the electrode 200 is first polished using the polishing component 30, which increases the roughness of the second region 202. Then, the coating head 20 applies insulating slurry to the second region 202, forming an insulating coating on the second region 202 of the electrode 200. This improves the adhesion of the insulating coating to the electrode 200, thereby reducing the risk of the insulating coating falling off.

[0151] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A coating device, characterized in that, The coating equipment includes: A back roller assembly, the back roller assembly including a coating roller configured to allow an electrode sheet to abut against and move by rotation; A coating head is provided along the radial direction of the coating roller, and the coating heads are spaced apart on one side of the coating roller. The coating head includes a first lip and a second lip, which are arranged along a first direction. The first lip is configured to coat a conductive paste onto a first region of the electrode, and the second lip is configured to coat an insulating paste onto a second region of the electrode. The first direction is consistent with the axial direction of the coating roller. A grinding assembly is disposed on one side of the coating roller along the radial direction of the coating roller. The grinding assembly and the second lip are spaced apart along the circumferential direction of the coating roller. The grinding assembly is configured to grind the second region before the second region is coated, so as to increase the roughness of the second region.

2. The coating equipment as described in claim 1, characterized in that, The number of polishing components is the same as that of the second region. When there are multiple polishing components and multiple second regions, the multiple polishing components are arranged along the axial direction of the coating roller, and the polishing components are arranged in a one-to-one correspondence with the second region.

3. The coating equipment as described in claim 1, characterized in that, The grinding assembly is connected to the coating roller and is movable relative to the coating roller along at least one of the first and second directions. The arrangement direction of the coating roller and the coating head is consistent with the second direction.

4. The coating equipment as described in claim 3, characterized in that, The polishing assembly includes a polishing element, which is circumferentially spaced from the second lip along the coating roller. Along the rotation direction of the coating roller, the polishing element is located upstream of the second lip and is configured to polish the second region.

5. The coating equipment as described in claim 4, characterized in that, The polishing assembly also includes an adjustment mechanism, which is located on the coating head and connected to the polishing component. Along the first direction and the second direction, the adjustment mechanism can drive the polishing component to move relative to the coating roller.

6. The coating equipment as described in claim 5, characterized in that, Along the second direction, the travel distance of the grinding element is between 1 micrometer and 10 micrometers.

7. The coating equipment as described in claim 5, characterized in that, The coating head has a through-channel. Along the second direction, the through-channel is connected to the opposite sides of the coating head. The adjustment mechanism is inserted into the through-channel and can move relative to the through-channel in the first direction. Along the second direction, the opposite sides of the adjustment mechanism protrude from the through-channel. The side of the adjustment mechanism facing the coating roller is connected to the grinding element.

8. The coating equipment as described in claim 7, characterized in that, The adjustment mechanism includes: An adjusting sleeve, at least partially inserted into the insertion channel and movable relative to the insertion channel in the first direction; An adjusting rod is inserted into the adjusting sleeve and is throttle-connected to the adjusting sleeve. Along the second direction, the adjusting rod includes a first end and a second end arranged in opposite directions. The first end is connected to the grinding element, and the second end is at least driven by an external force to move the adjusting rod so that the adjusting rod drives the grinding element to move in the second direction.

9. The coating equipment as described in claim 8, characterized in that, The adjusting rod is threadedly connected to the adjusting sleeve. A groove is provided on the side of the coating head facing the coating roller, and the groove extends along the second direction. The adjusting mechanism further includes: An adjusting seat is rotatably connected to the first end, and the grinding element is disposed on the adjusting seat; A retaining rod, one end of which is connected to the adjusting seat, and the other end of which is slidably disposed in the slide groove, wherein the retaining rod is fixed relative to the adjusting seat in a first direction and is slidable relative to the adjusting seat in a second direction.

10. The coating equipment as described in claim 9, characterized in that, The grinding component is a grinding wheel, which is rotatably mounted on the adjusting seat. The adjusting mechanism also includes a driving component, which is mounted on the adjusting seat and is connected to the grinding wheel in a driving manner. The rotation axis of the grinding wheel is parallel to the rotation axis of the coating roller, and the rotation direction of the grinding wheel is the same as the rotation direction of the coating roller.

11. The coating equipment as described in claim 10, characterized in that, The linear velocity of the grinding wheel is greater than the linear velocity of the coating roller.

12. The coating equipment as described in claim 9, characterized in that, The adjusting sleeve includes a sleeve body and an end plate. At least part of the sleeve body is disposed in the through-channel. The end plate is disposed on the side of the coating head away from the coating roller and is connected to the sleeve body. Along the circumference of the sleeve body, the side of the end plate away from the coating head is provided with a rotation scale. The adjusting rod includes a connected rod body and an adjusting wheel. The rod body is inserted into the sleeve body and the two are threaded together. The end of the rod body away from the adjusting wheel is connected to the grinding part and forms the first end. The adjusting wheel is disposed on the side of the end plate away from the coating head and forms the second end. The adjusting wheel is provided with a rotation mark, which can be selectively aligned with any scale line in the rotation scale.

13. The coating equipment as described in claim 7, characterized in that, The coating equipment further includes at least one fastener connected to the coating head. The fastener has a locked state and an unlocked state. In the locked state, the adjusting mechanism is clamped and fixed in the through-channel. In the unlocked state, the adjusting mechanism is movable relative to the through-channel in the second direction.

14. The coating apparatus according to any one of claims 5 to 13, characterized in that, The coating head is provided with a first translation scale on the side opposite to the coating roller. Multiple first scale lines of the first translation scale are arranged along the first direction. The adjustment mechanism can selectively align with any one of the multiple first scale lines. And / or, the coating head has a second translation scale on the side facing the coating roller, and multiple second scale lines of the second translation scale are arranged along the first direction, and the adjustment mechanism can be selectively aligned with any one of the multiple second scale lines.

15. A battery production line, characterized in that, The battery production line includes coating equipment according to any one of claims 1 to 14.

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