Pole piece processing equipment

Abstract

The utility model provides pole piece processing equipment, a pole piece comprises a target coating area and blank areas located on the two sides of the target coating area, the pole piece processing equipment comprises a rolling roller, the rolling roller comprises a rolling part, and the rolling part is used for forming a solid electrolyte layer in the target coating area; and the adhesive dispensing mechanism is located on the discharging side of the rolling station of the rolling roller and comprises an adhesive dispensing assembly and a drying assembly, the adhesive dispensing assembly is used for forming an adhesive layer in the target coating area, and the drying assembly is used for drying and shaping the adhesive layer. The pole piece processing equipment disclosed by the utility model is beneficial to stabilizing the positions of the pole pieces of the diaphragm-free laminated battery cell and avoiding dislocation of the pole pieces, so that the quality of the battery cell and the safety performance of the battery cell are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery processing technical field generally, concretely relates to a pole piece processing equipment. BACKGROUND

[0002] In the production process of diaphragm-free lamination battery, due to the absence of the restraint of diaphragm, the positive pole piece and the negative pole piece will be dislocated due to the lack of restraint and low friction, so that the negative pole piece cannot effectively cover the positive pole piece, causing the safety risk of battery. UTILITY MODEL CONTENTS

[0003] In view of the above defects or deficiencies in the prior art, it is desirable to provide a pole piece processing equipment, which forms an adhesive layer in the target coating area, which is conducive to stabilizing the position of the pole piece in the diaphragm-free lamination battery cell, avoiding the dislocation of the pole piece, and further improving the quality and safety performance of the battery cell.

[0004] The utility model provides a kind of pole piece processing equipment, and pole piece includes target coating area pole piece processing equipment comprising:

[0005] Rolling roller, and rolling roller includes rolling part, and rolling part is used to press solid electrolyte layer in target coating area;

[0006] Dispensing mechanism, dispensing mechanism is located at the discharging side of the rolling station of rolling roller, and dispensing mechanism includes dispensing assembly and drying assembly, dispensing assembly is used to form adhesive layer in target coating area, and drying assembly is used to dry and shape adhesive layer.

[0007] As an optional scheme, drying assembly is located at the discharging side of the dispensing station of dispensing assembly;

[0008] As an optional scheme, drying assembly includes multiple laser lamps, which are arranged at intervals along the transmission direction of pole piece.

[0009] As an optional scheme, dispensing assembly includes glue valve, in first direction, glue valve is located at one side of pole piece, and glue valve can be moved towards or away from target coating area along first direction, to adjust the distance between glue valve and target coating area in first direction;Wherein, first direction is perpendicular to the conveying plane of pole piece.

[0010] As an optional scheme, dispensing assembly includes first moving shaft, and the extension direction of first moving shaft is arranged in parallel to first direction, and glue valve is slidably connected with first moving shaft, so that glue valve can be moved in first direction along first moving shaft.

[0011] As an optional solution, the dispensing assembly further comprises a second moving shaft, the extension direction of the second moving shaft is parallel to the second direction, and the glue valve is in sliding connection with the second moving shaft, so that the glue valve can move in the second direction along the second moving shaft, to adjust the position of the glue valve relative to the target coating area, and to cover the target coating area with the glue discharge area of the glue valve; wherein the second direction is perpendicular to the transmission direction of the pole piece and perpendicular to the first direction.

[0012] As an optional solution, the dispensing assembly further comprises a support plate arranged opposite the glue valve in the first direction, in the first direction, the support plate is located on the side of the pole piece away from the target coating area, and the support plate has a support surface in contact with the pole piece.

[0013] As an optional solution, the dispensing assembly further comprises: at least two passing rollers, the at least two passing rollers are arranged in parallel and spaced apart along the transmission direction of the pole piece, the pole piece passes through each passing roller along a predetermined track in the transmission direction, the support plate is located between two adjacent passing rollers, the distance between the support surface and the pole piece is d1, and the distance between the plane where the passing roller is in contact with the pole piece and the pole piece is d2, d1>d2.

[0014] As an optional solution, the difference between d1 and d2 is 0.3mm-0.5mm.

[0015] As an optional solution, the pole piece further comprises blank areas located on both sides of the target coating area, and the dispensing assembly further comprises a protection assembly located between the pole piece and the glue valve in the first direction, the protection assembly comprises a protection part, the protection part is arranged corresponding to the blank area, and the orthographic projection of the protection part on the pole piece covers at least the blank area.

[0016] As an optional solution, the protection part comprises a brush, and the brush is in contact with the blank area.

[0017] As an optional solution, the protection assembly further comprises a support frame, the protection part is movably mounted on the support frame, the support frame is arranged in extension along the second direction, and the protection part can move in the second direction towards or away from the blank area along the support frame, to adjust the position of the protection part and to cover the blank area with the projection of the protection part on the pole piece.

[0018] The utility model discloses an electrode piece processing equipment, through setting point gum mechanism at the discharge side of the rolling work station of the rolling roller, and point gum mechanism includes point gum subassembly and drying subassembly, and point gum subassembly is used for forming the adhesive layer in target coating area, and drying subassembly is used for drying the adhesive layer of fixed shape. After coating adhesive layer and drying in target coating area, it is favorable to facilitate the subsequent process of electrode piece, after completing the diaphragmless lamination process, through the hot pressing process, the adhesive layer changes in nature, and the positive electrode piece and the negative electrode piece of the battery cell are closely bonded, do not need to use adhesive tape to bond and fix, avoid the problem of electrode piece misplacement and electrode piece damage due to the soft texture of electrode piece, further realize the stable fixation of positive electrode piece and negative electrode piece, reliably avoid the safety hazard of electrode piece misplacement, and it is favorable to improve the quality and safety performance of battery cell. BRIEF DESCRIPTION OF DRAWINGS

[0019] Other features, objects, and advantages of the application will become more apparent from the following detailed description of non-limiting embodiments made with reference to the drawings:

[0020] Figure 1 It is the processing procedure schematic view of the electrode piece processing equipment of the embodiment of the application;

[0021] Figure 2 It is the structure schematic view of the point gum subassembly in the electrode piece processing equipment of the embodiment of the application;

[0022] Figure 3 It is the structure schematic view of the point gum subassembly in the electrode piece processing equipment of the embodiment of the application (not shown sealing door);

[0023] Figure 4 It is the structure schematic view of the drying subassembly in the electrode piece processing equipment of the embodiment of the application;

[0024] In the drawings,

[0025] 100, electrode piece processing equipment, 1, electrode piece, 11, target coating area, 12, blank area;

[0026] 10, rolling roller;

[0027] 20, point gum mechanism, 21, point gum subassembly, 22, drying subassembly, 30, slitting mechanism;

[0028] 211, machine case, 212, glue valve, 213, sealing door, 214, first moving shaft, 215, second moving shaft, 216, passing roller, 217, support plate, 218, protection part, 219, first support rod, 220, second support rod, 221, laser lamp. DETAILED DESCRIPTION

[0029] The application will be further described in detail below with reference to the embodiments. It can be understood that the specific embodiments described herein are only used to explain the related utility model, and not to limit the utility model.

[0030] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments.

[0031] In the related art, the positive and negative pole pieces are stacked by an automatic stacking machine without a diaphragm, and after the stacking of the battery core package is completed, the automatic gluing mechanism of the stacking machine is used to paste the termination tape to bind the core package. Since the core package is in a state without a diaphragm and the surface of the core package is soft, the tension of the tape cannot be effectively controlled during the pasting process of the termination tape, the pasting tension is too large to damage the pole piece, the pasting tension is too small to effectively bind, and the pole piece is prone to dislocation during the subsequent core package turnover process, which causes safety risks of the product.

[0032] Based on the above problems, the embodiments of the present application provide a pole piece processing equipment 100, as shown in the figure, the pole piece 1 includes a target coating area 11 and a blank area 12 located on both sides of the target coating area 11, and the pole piece processing equipment 100 includes: Figures 1-4

[0033] A rolling roller 10, the rolling roller 10 includes a rolling part, the rolling part is used to press and combine the solid electrolyte layer in the target coating area 11;

[0034] A dispensing mechanism 20, the dispensing mechanism 20 is located on the discharge side of the rolling work station of the rolling roller 10, the dispensing mechanism 20 includes a dispensing assembly 21 and a drying assembly 22, the dispensing assembly 21 is used to form an adhesive layer in the target coating area 11, and the drying assembly 22 is used to dry and shape the adhesive layer.

[0035] It should be noted that the pole piece processing equipment 100 of the embodiments of the present application can be applied to coat different materials (such as but not limited to solid electrolyte, active material or adhesive layer) on the surface of the pole piece 1 in the battery production process, and of course can also be applied to the processing of other sheet-shaped substrates.

[0036] It can be understood that the target coating area 11 of the pole piece 1 refers to the area on the pole piece 1 where the positive active material, the negative active material or the solid electrolyte is arranged, which is generally the area close to the center of the pole piece 1; the blank area 12 refers to the area for arranging the pole lug, which is generally the area close to the two sides of the pole piece 1 and is located on both sides of the target coating area, and the blank area 12 usually does not arrange any coating material; of course, in actual processing, in order to protect the pole lug, the blank area 12 usually also arranges a protective layer material first, and after the target coating area 11 forms the target coating layer, the protective layer material is removed, which is determined according to the actual processing process.

[0037] ​In the process of processing the pole piece, the processing procedure including a plurality of pole pieces 1 is transmitted to the next procedure for further processing after the previous procedure is completed. Here, the rolling roller 10 is mainly used for further processing the solid electrolyte after the solid electrolyte is coated, stabilizing the solid electrolyte layer, and ensuring that the solid electrolyte layer has good performance. The discharge side of the rolling position of the rolling roller 10 refers to the side of the next procedure of the current procedure; it can be understood that after the solid electrolyte layer on the pole piece 1 is rolled, the pole piece 1 is transmitted to the dispensing position of the dispensing mechanism 20, the dispensing mechanism 20 forms an adhesive layer in the target coating area 11 of the pole piece 1, which is beneficial to facilitate the subsequent process of the pole piece 1. After the procedure of stacking the pole pieces without separators is completed, the adhesive layer changes in properties through the hot pressing process, tightly bonding the positive and negative pole pieces of the battery cell, eliminating the need for adhesive tape to bond and fix the pole pieces, avoiding the problems of pole piece misalignment and pole piece damage due to the soft texture of the pole pieces, and further realizing the stable fixation of the positive and negative pole pieces, reliably avoiding the safety hazards of pole piece misalignment.

[0038] It can also be understood that the adhesive layer can be but is not limited to a modified PVDF (polyvinylidene fluoride) suspension. The dispensing assembly 21 can form an adhesive layer on the target coating area 11 of the pole piece 1 by spraying, doctor blading, or the like; the drying assembly 22 can dry the adhesive layer by any drying method, thereby facilitating reliable transmission of the pole piece 1 to the next station. The drying method can be but is not limited to heating and drying, laser drying, etc. The drying assembly 22 can be provided at the same station as the dispensing assembly 21, so that the dispensing assembly 21 can dry the adhesive layer at the same time of forming the adhesive layer; the drying assembly 22 can also be provided at the discharge side of the dispensing position of the dispensing assembly 21, i.e., the drying assembly 22 is located at the next station of the dispensing position of the dispensing assembly 21. After the dispensing assembly 21 forms the adhesive layer, the pole piece 1 is transmitted to the drying position of the drying assembly 22 for drying the adhesive layer.

[0039] In actual processing, after the adhesive layer is dried, the pole piece 1 can be normally transmitted, and after the slitting and die cutting procedures, the battery cell is stacked without separators by an automatic stacking machine. After the battery cell is stacked, a small-tension automatic adhesive taping process is used, and then the pole piece 1 is tightly bonded and stably fixed by the hot pressing procedure, preventing the pole piece 1 from misalignment and causing safety risks.

[0040] The pole piece processing equipment 100 of the embodiment of the present application solves the problem that the pole piece 1 in the existing technology is prone to misalignment. The pole piece processing equipment 100 of the embodiment of the present application is provided with a dispensing mechanism 20 on the discharge side of the rolling station of the rolling roller 10. The dispensing mechanism 20 comprises a dispensing assembly 21 and a drying assembly 22. The dispensing assembly 21 is used to form an adhesive layer on the target coating area 11. The drying assembly 22 is used to dry and shape the adhesive layer. After the adhesive layer is coated and dried on the target coating area 11, it is convenient for the pole piece 1 to perform subsequent processes. After the non-membrane lamination process is completed, the adhesive layer changes in nature through the hot pressing process, and the positive pole piece and the negative pole piece of the battery cell are tightly bonded without the need for using adhesive tape to bond and fix, thereby avoiding the problems of pole piece 1 misalignment and pole piece 1 damage due to the soft texture of the pole piece 1. Further, the positive pole piece and the negative pole piece are stably fixed, the safety hazard of pole piece 1 misalignment is reliably avoided, and the quality and safety performance of the battery cell are improved.

[0041] In a preferred embodiment, the drying assembly 22 is located on the discharge side of the dispensing station of the dispensing assembly 21.

[0042] In the embodiment, the drying assembly 22 is located on the discharge side of the dispensing station of the dispensing assembly 21, which is advantageous for simplifying the equipment structure and facilitating operation and setting.

[0043] In some embodiments, the drying assembly 22 comprises a plurality of laser lamps 221 arranged at intervals along the transmission direction of the pole piece 1 (such as the Y direction in the figure). Figure 3

[0044] The number of laser lamps 221 can be two or more, but is not limited thereto.

[0045] In the embodiment, the drying adhesive layer is irradiated by the laser lamp 221. Laser drying has the advantages of high temperature rising speed, strong heating area pertinence, high energy utilization rate, high drying efficiency, and high uniformity. Compared with the traditional electric box and steam baking method, laser drying is more suitable for surface drying of the adhesive layer.

[0046] For example, under the condition that the adhesive liquid solid content of the adhesive layer is greater than 20% and the pole piece walking speed (transmission speed) is 60 m / min, the length of the drying area formed by the laser lamp 221 in the transmission direction of the pole piece can be 2 m, which effectively saves the process space and is advantageous for directly integrating the drying assembly 22 on the roller dividing equipment.

[0047] As an implementable manner, the dispensing assembly 21 comprises a glue valve 212. In a first direction, the glue valve 212 is located on one side of the pole piece 1, and the glue valve 212 can move towards or away from the target coating area 11 along the first direction to adjust the distance between the glue valve 212 and the target coating area 11 in the first direction. The first direction is perpendicular to the conveying plane of the pole piece 1. ​

[0048] The first direction can be a Z direction in the Y direction, and the glue valve 212 moves along the first direction. The height of the glue valve 212 can be adjusted, and thus the distance between the glue valve 212 and the target coating area 11 can be adjusted, which is conducive to reliably forming the adhesive layer in the target coating area 11. Figure 3

[0049] It can be understood that the glue valve 212 is mainly used for glue dispensing, and the glue valve 212 can be but is not limited to a fan-shaped glue dispensing valve 212 and a rotary glue dispensing valve 212. The fan-shaped glue dispensing valve 212 has the advantages of precise glue dispensing coverage, uniform glue dispensing, and small glue splashing, and by adjusting the glue dispensing parameters and selecting a suitable adhesive glue layer with a solid content, the glue coverage can be effectively controlled to be 10%-30% (the coverage here refers to the coverage after drying, in order to facilitate spraying, the adhesive glue layer includes solvent, and after spraying, a wet film is formed on the target coating area 11 of the pole piece 1, and the coverage of the wet film is generally larger, accounting for about 90% of the target coating area 11 of the pole piece 1, and after drying by the drying assembly 22, only the adhesive glue layer is left after the solvent volatilizes, and the coverage is reduced to 10%-30%), and the coating area density is controlled to be 0.5-1 g / m 2 ; the rotary glue dispensing valve 212 has the advantages of uniform glue dispensing and compatibility with low glue dispensing control capability, and by adjusting the glue dispensing parameters and selecting a suitable adhesive glue layer with a solid content, the glue coverage can be effectively controlled to be 10%-30%, and the coating area density is controlled to be 0.2-6 g / m 2 .

[0050] In actual processing, under the influence of factors such as the glue properties of different adhesive layers, the conveying speed of the pole piece 1, and the glue dispensing rate of the glue valve 212, in order to ensure that the adhesive layer can be reliably sprayed in the target coating area of the pole piece 1, the glue valve 212 can be controlled to move closer to or farther away from the target coating area of the pole piece 1 in the first direction, so as to adjust the glue dispensing height or glue dispensing range of the glue valve 212, and ensure that the coverage and area density of the adhesive layer of the target coating area 11 meet the process requirements.

[0051] The glue valve 212 can be arranged on a guide rail, and the glue valve 212 moves along the first direction on the guide rail; of course, the glue valve 212 can also be driven by a driving motor to drive the extension shaft to move and drive the glue valve 212 to move along the first direction.

[0052] In some embodiments, the glue dispensing assembly 21 includes a first moving shaft 214, the extension direction of the first moving shaft 214 is parallel to the first direction, and the glue valve 212 is in sliding connection with the first moving shaft 214, so that the glue valve can move along the first moving shaft 214 in the first direction.

[0053] In this embodiment, the first moving shaft 214 has a simple structure, is easy to set, and can reliably ensure the movement of the glue valve 212.​

[0054] As a realizable way, the glue valve 212 can move along the second direction to adjust the position of the glue valve 212 relative to the target coating area 11, and make the glue outlet area of the glue valve 212 cover the target coating area 11; wherein the second direction is perpendicular to the transmission direction of the pole piece 1, and the first direction is perpendicular to the second direction.

[0055] Wherein, the second direction can be the X direction in the Figure 3 The glue valve 212 moves along the second direction can be suitable for pole pieces 1 of different sizes, and according to the size of the pole piece 1, the movement of the glue valve 212 is conducive to ensuring that the glue outlet area of the glue valve 212 always covers the target coating.

[0056] In some embodiments, the glue valve 212 can be separately arranged on the guide rail, and the glue valve 212 moves along the second direction on the guide rail; of course, the glue valve 212 can also be arranged on the guide rail together with the first moving shaft 214, so that the glue valve 212 and the first moving shaft 214 move along the second direction on the guide rail at the same time; in some other embodiments, the glue valve 212 can also be driven to move along the second direction by the driving motor driving the telescopic shaft.

[0057] In some embodiments, the glue dispensing assembly 21 further comprises a second moving shaft 215, the extension direction of the second moving shaft 215 is parallel to the second direction, and the glue valve 212 is in sliding connection with the second moving shaft 215, so that the glue valve 212 can move along the second moving shaft 215 in the second direction to adjust the position of the glue valve relative to the target coating area, and make the glue outlet area of the glue valve cover the target coating area; wherein the second direction is perpendicular to the transmission direction of the pole piece and perpendicular to the first direction.

[0058] Wherein, the extension direction of the second moving shaft 215 is parallel to the second direction, that is, the second moving shaft 215 is arranged along the X direction in the Figure 3 The glue valve 212 and the second moving shaft 215 can be in sliding connection in any way, for example, a sliding groove is formed on the second moving shaft 215, and a sliding table is arranged on the glue valve 212, the sliding table and the sliding groove cooperate, and the glue valve 212 can slide on the first moving shaft 214.

[0059] In this embodiment, the second moving shaft 215 is simple in structure, easy to process and set, and is conducive to adjusting the position of the glue valve 212 in the second direction, thereby ensuring that it can be suitable for pole pieces 1 of different sizes, and increasing the applicability of the false pole piece processing equipment.

[0060] As an implementable manner, the dispensing assembly 21 further comprises at least two passing rollers 216, which are arranged in parallel along the transmission direction of the pole piece 1 and pass through each passing roller 216 along a predetermined track in the transmission direction.

[0061] The transmission direction of the pole piece 1 can refer to the Y direction in the figure. The passing roller 216 can be two or more, and the body of the passing roller 216 can be made of 6061 material. The surface of the passing roller 216 in contact with the pole piece 1 is treated with a DLC coating to increase the surface wear resistance and anti-sticking property.

[0062] In the embodiment, the at least two passing rollers 216 are arranged in parallel along the transmission direction and pass through each passing roller 216, which is conducive to supporting the pole piece 1 to provide tension to the pole piece 1, so that the pole piece 1 remains flat during transmission and does not wrinkle, thereby ensuring the uniformity of the adhesive layer on the target coating.

[0063] In some embodiments, the dispensing assembly 21 further comprises a support plate 217 arranged opposite the glue valve in the first direction. In the first direction, the support plate 217 is located on the side of the pole piece 1 away from the target coating area 11, and the support plate 217 has a support surface in contact with the pole piece 1.

[0064] In the embodiment, the support plate 217 serves to provide good support, thereby reducing the shaking of the pole piece 1 during spraying, and thereby facilitating the uniformity of the adhesive layer.

[0065] The support surface of the support plate 217 can also be coated with a DLC coating to increase the surface wear resistance and anti-sticking property.

[0066] In some embodiments, the support plate 217 is located between the two adjacent passing rollers 216, the distance between the support surface and the pole piece 1 is d1, and the distance between the plane where the passing roller 216 contacts the pole piece 1 and the pole piece 1 is d2, d1>d2.

[0067] In the embodiment, the support plate 217 is located between the two adjacent passing rollers 216, which is conducive to reliably supporting the pole piece 1, ensuring that the pole piece 1 does not shake stably, ensuring the uniformity of the adhesive layer, and not affecting the normal transmission of the pole piece 1.

[0068] In a preferred embodiment, the difference between d1 and d2 is 0.3mm-0.5mm.

[0069] Specifically, the difference between d1 and d2 can be, but is not limited to, 0.3mm, 0.35mm, 0.4mm, 0.45mm or 0.5mm, etc.

[0070] The difference between d1 and d2 in the embodiment is advantageous to avoid the wrinkles in the sprayed adhesive layer, and avoid the problem of interference between the support plate 217 and the roller 216; at the same time, it is advantageous to provide reliable support for the support surface of the support plate 217 to the pole piece 1, to ensure the stable transmission of the pole piece 1 between the adjacent two rollers 216, to avoid the shaking of the dispensing assembly 21 in spraying the adhesive layer, and to ensure the uniformity of the adhesive layer.

[0071] As a realizable manner, the dispensing assembly 21 further comprises a protection assembly between the pole piece and the glue valve in the first direction, and the protection assembly comprises a protection part 218 corresponding to the blank area 12, and the orthographic projection of the protection part 218 on the pole piece 1 covers at least the blank area.

[0072] In the embodiment, the orthographic projection of the protection part 218 on the pole piece 1 covers at least the blank area, which is advantageous to protect the blank area 12 and avoid the influence of the adhesive liquid splashing of the adhesive layer on the blank area 12 in the process of spraying the adhesive layer.

[0073] It can be understood that the protection part 218 can be in contact with the blank area 12 of the pole piece 1, and of course the protection part 218 can be just above the blank area 12 without being in contact with the blank area 12, as long as the shielding effect can be achieved and the normal transmission of the pole piece 1 is not affected.

[0074] In some embodiments, the protection part 218 comprises a brush, and the brush is in contact with the blank area 12.

[0075] The brush is made of high-density soft bristle material, and the brush is in contact with the blank area 12, which can effectively protect the influence of the adhesive liquid splashing on the blank area 12 of the pole lug without damaging the pole piece 1.

[0076] In actual processing, according to the size of the protection area of the blank area 12, the width of the brush (the size of the brush in the second direction, Figure 3 X direction in the formula) can be 20mm.

[0077] As a realizable manner, the protection part 218 moves towards or away from the blank area 12 to adjust the position of the protection part 218 and make the position of the protection part 218 on the pole piece 1 cover the protection area.

[0078] It can be understood that the protection part 218 can move towards or away from the blank area 12 along the first direction, and of course the protection part 218 can also move towards or away from the blank area 12 along the second direction.

[0079] In this embodiment, the movement of the protection part 218 is conducive to adjusting the position of the protection part 218 according to the size of the pole piece 1, so that the orthographic projection of the protection part 218 on the pole piece 1 covers the protection area of the blank area 12, and ensures that the glue splashing of the adhesive layer does not affect the blank area 12.

[0080] In some embodiments, the protection assembly further comprises a support frame extending in the second direction, and the protection part 218 is movable in the second direction towards or away from the blank area 12 along the support frame to adjust the position of the protection part 218 and make the projection of the protection part on the pole piece cover the blank area 12.

[0081] For example, the support frame comprises a first support rod 219 and a second support rod 220 perpendicular to each other, and the protection part 218 is movable in the length direction of the first support rod 219 and / or the length direction of the second support rod 220 towards or away from the blank area 12.

[0082] It can be understood that the protection part 218 can be mounted on the first support rod 219 and moved in the length direction of the first support rod 219 towards or away from the blank area 12, and the first support rod 219 is mounted on the second support rod 220, and the first support rod 219 drives the protection part 218 to move in the length direction of the second support rod 220 towards or away from the blank area 12; of course, the protection part 218 can also be mounted on the second support rod 220 and moved in the length direction of the second support rod 220 towards or away from the blank area 12, and the second support rod 220 is mounted on the first support rod 219, and the second support rod 220 drives the protection part 218 to move in the length direction of the first support rod 219 towards or away from the blank area 12.

[0083] Among them, the protection part 218 and the support frame can be connected by any kind of movable connection, for example but not limited to sliding rail or sliding groove, etc.

[0084] In this embodiment, the support frame is conducive to supporting and installing the protection part 218, and can flexibly adjust the movement of the protection part 218 towards or away from the blank area 12, which is conducive to being applicable to pole pieces 1 of different sizes and increasing the applicability of the pole piece processing equipment.

[0085] In some embodiments, the glue dispensing assembly 21 further comprises a cabinet 211, and the glue valve 212 is mounted inside the cabinet 211. The cabinet 211 comprises a sealing door 213 which is openably and closably arranged on the cabinet 211, which is conducive to protecting the glue of the adhesive layer and avoiding the splashing of the glue of the adhesive layer.

[0086] In summary, the pole piece processing equipment of the embodiment of the present application is provided with a dispensing mechanism 20 on the discharge side of the rolling station of the rolling roller 10. The dispensing mechanism 20 comprises a dispensing assembly 21 and a drying assembly 22. The dispensing assembly 21 is used to form an adhesive layer on the target coating area 11. The drying assembly 22 is used to dry and shape the adhesive layer. After the adhesive layer is coated and dried on the target coating area 11, it is convenient for the subsequent process of the pole piece 1. After the diaphragm-free lamination process is completed, the adhesive layer changes in properties through the hot pressing process, tightly bonding the positive pole piece and the negative pole piece of the battery cell, without the need of using adhesive tape for bonding and fixing, avoiding the problems of pole piece misalignment and pole piece damage due to the soft texture of the pole piece, further realizing the stable fixing of the positive pole piece and the negative pole piece, reliably avoiding the safety hazard of pole piece misalignment, and being conducive to improving the quality and safety performance of the battery cell.

[0087] Moreover, by moving the position of the glue valve 212, it is conducive to applying pole pieces of different sizes to reliably form an adhesive layer on the target coating area 11. The support plate 217 and the passing roller 216 are provided to stably transmit the pole piece and prevent it from shaking during the glue spraying process, improve the uniformity of the adhesive layer, and the protection assembly can effectively protect the blank area 12 from being affected by the glue solution of the adhesive layer.

[0088] The pole piece processing equipment of the present application will be described below through a specific embodiment.

[0089] As shown in Figures 1-4 , the pole piece processing equipment comprises a rolling roller 10, a dispensing assembly 21, a drying assembly 22, and a cutting mechanism 30. On the production line for processing the pole piece 1, the dispensing assembly 21 is arranged on the discharge side of the rolling station of the rolling roller 10. The discharge side of the dispensing station of the dispensing assembly 21 is provided with the drying assembly 22. The discharge side of the drying station of the drying assembly 22 is provided with the cutting mechanism 30. Other processes of the pole piece 1 are not shown here.

[0090] Specifically, as shown in Figure 2 and 3 , the dispensing mechanism 20 comprises a machine box 211, a glue valve 212, a first moving shaft 214, and a second moving shaft 215. The machine box 211 comprises a sealing door 213 connected movably. The sealing door 213 can move up and down (along the Z direction in Figure 2 ). The second moving shaft 215 is also installed on the machine box 211. The length direction of the second moving shaft 215 translates in the second direction (Y direction in Figure 3In the X direction), the glue valve 212 and the first moving shaft 214 are slidably connected to the second moving shaft 215, and the glue valve 212 and the first moving shaft 214 can move along the extension direction of the second moving shaft 215. The extension direction of the first moving shaft 214 is parallel to the first direction. The glue valve 212 can also move along the length direction of the first moving shaft 214 (Z direction in Figure 3), so that the glue dispensing area of ​​the glue valve 212 can cover the target coating area 11.

[0091] The housing 211 is also provided with rollers 216 and support plates 217. The rollers 216 are arranged parallel to each other at intervals along the transmission direction of the electrode 1 (Y direction in Figure 3). The length direction of the rollers 216 is parallel to the second direction. The electrode 1 passes through each roller 216. The support plate 217 is located in the area between two adjacent rollers 216 and is located on the side of the electrode 1 away from the target coating. The support plate 217 has a support surface that contacts the electrode 1. The distance between the support surface and the electrode 1 is d1. The distance between the plane where the rollers 216 contact the electrode 1 and the electrode 1 is d2. The difference between d1 and d2 is 0.3mm-0.5mm.

[0092] The chassis 211 is also equipped with a protective component, which includes a support frame. The support frame includes a first support rod 219 and a second support rod 220. The first support rod 219 is fixed on the chassis 211. A brush (protective part 218) is installed at one end of the second support rod 220. The other end of the second support rod 220 is connected to the first support rod 219. The brush can move along the length of the second support rod 220 and contact the protective area of ​​the blank area 12.

[0093] like Figure 4 As shown, the drying assembly 22 includes a plurality of laser lamps 221 arranged at intervals along the transmission direction of the electrode 1, with the laser lamps 221 located on the side facing the target coating area 11 in the first direction.

[0094] In the actual processing, after the rolling roller 10 rolls the solid electrolyte layer on the electrode 1, the electrode 1 is transferred to the dispensing station. The support plate 217 and the guide roller 216 support the electrode 1. The position of the glue valve 212 is adjusted so that the glue outlet area of ​​the glue valve 212 can cover the target coating area 11. The brush is adjusted to contact the protective area of ​​the blank area 12. The glue valve 212 sprays the adhesive liquid of the bonding layer onto the target coating area 11 on the electrode 1. The coverage of the sprayed wet film is higher than 90%. After spraying, the electrode 1 is transferred to the drying station, where the adhesive layer is laser dried at a temperature not exceeding 80°C. The solvent in the adhesive liquid evaporates, resulting in an adhesive layer coverage of approximately 10%-30%, and the coating density can be effectively controlled between 0.2-1 g / m². 2After drying, the core package is wound, the pole piece 1 normally passes through the slitting and die cutting processes, and then the automatic laminating machine is used to complete the lamination without diaphragm, the core package after lamination is processed by small tension automatic adhesive process, and then transferred to the hot pressing process for hot pressing. The adhesive layer will change in properties, thereby tightly bonding the pole piece 1, thereby effectively avoiding the safety risk caused by the dislocation of the pole piece 1 of the core package.

[0095] The above description is only the preferred embodiment of the present application and the explanation of the technical principles applied. Those skilled in the art should understand that the utility model range involved in the present application is not limited to the technical solutions formed by the specific combination of the above technical features, and also covers other technical solutions formed by any combination of the above technical features or equivalent features without departing from the utility model concept. For example, the above features are replaced with the technical features disclosed in the present application (but not limited to) having similar functions to form a technical solution.

Claims

1. A pole piece processing apparatus characterized by, The pole piece includes a target coating area, and the pole piece processing equipment includes: a rolling roller including a rolling part for pressing a solid electrolyte layer at the target coating area; a dispensing mechanism located at the discharge side of the rolling station of the rolling roller, the dispensing mechanism including a dispensing assembly for forming an adhesive layer at the target coating area and a drying assembly for drying and shaping the adhesive layer.

2. The pole piece processing apparatus according to claim 1, characterized by, The drying assembly is located at the discharge side of the dispensing station of the dispensing assembly.

3. The pole piece processing apparatus according to claim 2, characterized by, The drying assembly includes a plurality of laser lamps arranged at intervals along the transmission direction of the pole piece.

4. The pole piece processing apparatus of claim 1, wherein The dispensing assembly includes a glue valve located at one side of the pole piece in a first direction, and the glue valve is movable toward or away from the target coating area in the first direction to adjust the distance between the glue valve and the target coating area in the first direction; wherein the first direction is perpendicular to the conveying plane of the pole piece.

5. The pole piece processing apparatus of claim 4, wherein The dispensing assembly includes a first moving shaft, the extension direction of the first moving shaft is arranged parallel to the first direction, and the glue valve is slidingly connected with the first moving shaft, so that the glue valve can move in the first direction along the first moving shaft.

6. The pole piece processing apparatus of claim 4, wherein The dispensing assembly further includes a second moving shaft, the extension direction of the second moving shaft is parallel to a second direction, and the glue valve is slidingly connected with the second moving shaft, so that the glue valve can move in the second direction along the second moving shaft to adjust the position of the glue valve relative to the target coating area and cover the target coating area with the glue discharge area of the glue valve; wherein the second direction is perpendicular to the transmission direction of the pole piece and perpendicular to the first direction.

7. The pole piece processing apparatus of claim 6, wherein The dispensing assembly further includes a support plate arranged opposite the glue valve in the first direction, the support plate is located at the side of the pole piece away from the target coating area in the first direction, and the support plate has a support surface in contact with the pole piece.

8. The pole piece processing apparatus of claim 7, wherein The dispensing assembly further includes at least two passing rollers arranged at intervals and parallel to the transmission direction of the pole piece, the pole piece passes through each passing roller along a predetermined track in the transmission direction; the support plate is located between adjacent two passing rollers, the distance between the support surface and the pole piece is d1, and the distance between the plane where the passing roller contacts the pole piece and the pole piece is d2, d1>d2.

9. The pole piece processing apparatus of claim 8, wherein The difference between d1 and d2 is 0.3mm-0.5mm.

10. The pole piece processing apparatus of claim 6, wherein The pole piece further includes blank areas located on both sides of the target coating area, and the dispensing assembly further includes a protection assembly located between the pole piece and the glue valve in the first direction, the protection assembly includes a protection part corresponding to the blank area, and the protection part has a normal projection on the pole piece covering at least the blank area.

11. The pole piece processing apparatus of claim 10, wherein The protection part includes a brush in contact with the blank area.

12. The pole piece processing apparatus of claim 10, wherein The protection assembly further comprises a support frame, the protection part is movably mounted on the support frame, the support frame is arranged to extend along the second direction, and the protection part is movable along the support frame in the second direction towards or away from the blank area, so as to adjust the position of the protection part and make the projection of the protection part on the pole piece cover the blank area.

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