Pole piece forming equipment based on thinning area elimination and adhesive layer lamination and solid-state battery production line

Abstract

The utility model discloses a solid battery production line based on the thinning area elimination and glue layer superposition of pole piece forming equipment, wherein the pole piece forming equipment based on the thinning area elimination and glue layer superposition includes conveying device, coating device, finishing device, electrode coating solidification device and glue layer superposition device, and the conveying device is used for conveying the base material, the coating device is used for coating the base material on the conveying device to form the electrode coating on the base material, the finishing device is used for eliminating the thinning area of electrode coating on the base material to obtain the pole piece, the electrode coating solidification device is used for solidifying the electrode coating formed on the base material, and the glue layer superposition device is used for superimposing the glue layer on the pole piece. The pole piece forming equipment based on the thinning area elimination and glue layer superposition of the utility model can eliminate the thinning area of the pole piece coating, superimpose the glue layer again, avoid the existence of the thinning area of the pole piece coating, reduce the short circuit risk, and be favorable for improving the quality of the solid battery.

Description

Technical Field

[0001] This utility model relates to the technical field of solid-state battery production equipment, and in particular to electrode forming equipment and solid-state battery production line based on thinning zone elimination and adhesive layer lamination. Background Technology

[0002] Solid-state batteries are batteries that use solid electrolytes instead of the separators and liquid electrolytes used in traditional lithium-ion batteries. This allows the graphite or silicon anodes in traditional lithium-ion batteries to be replaced by lithium metal anodes, which have a higher energy density than traditional anodes, allowing the battery to store more energy in the same volume.

[0003] In related technologies, the substrate needs to be coated during the solid-state battery production process to obtain the electrode sheet.

[0004] However, in the existing solid-state battery manufacturing process, the electrode obtained after coating the substrate has a thinned area at the edge of the electrode coating. This area will have a depression after roll pressing and lamination, which increases the risk of short circuit. Utility Model Content

[0005] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes an electrode forming device based on thinning area elimination and adhesive layer lamination, which can eliminate the thinning area of ​​the electrode coating and then laminate the adhesive layer, avoiding the existence of thinning areas in the electrode coating, reducing the risk of short circuits, and improving the quality of solid-state batteries.

[0006] This invention also proposes a solid-state battery production line with the above-mentioned electrode forming equipment based on the elimination of thinning zones and the bonding of adhesive layers.

[0007] An electrode forming apparatus based on thinning zone elimination and adhesive layer lamination according to a first aspect embodiment of the present invention includes:

[0008] Conveying device for conveying substrate;

[0009] A coating apparatus for coating the substrate on the conveying device to form an electrode coating on the substrate;

[0010] A trimming device for removing thinned areas of the electrode coating on the substrate to obtain an electrode sheet;

[0011] An electrode coating curing apparatus is used to cure an electrode coating formed on the substrate;

[0012] An adhesive coating device is used to coat the electrode sheet with an adhesive layer.

[0013] The electrode forming equipment based on thinning zone elimination and adhesive layer lamination according to the embodiments of the present invention has at least the following beneficial effects:

[0014] 1. This utility model eliminates the thinned area of ​​the electrode coating by setting a trimming device before applying the adhesive layer, thereby eliminating the quality problems caused by the thickness change of the thinned area of ​​the electrode coating. It avoids the possibility of depressions or holes in this area after the electrode sheet and electrolyte layer are rolled together even after the adhesive is applied, which could lead to short circuits or breakage. This is beneficial to improving the quality of solid-state batteries.

[0015] 2. This utility model uses an electrode coating curing device to cure the electrode coating formed on the substrate, thereby ensuring that the electrode coating on the substrate can be cured in a timely manner and avoiding the shape and boundary of the electrode coating being affected by untimely curing.

[0016] 3. This utility model uses an adhesive layer bonding device to perform surface treatment on the electrode sheet, which can further enhance the structural stability of the electrode sheet and improve the bonding force of subsequent roll bonding, thereby improving the safety and quality of solid-state batteries.

[0017] According to some embodiments of the present invention, the trimming device includes an adhesive application component and an adhesive peeling component. The adhesive application component, the coating device, and the adhesive peeling component are arranged sequentially along the conveying direction of the conveying device. The adhesive application component is used to apply adhesive tape to a portion of the area to be coated on the substrate where the thinning zone is formed. The adhesive peeling component is used to peel off the adhesive tape from the coated substrate to eliminate the thinning zone of the electrode coating on the substrate.

[0018] The advantages of this invention are: by using an adhesive application component to pre-cover the thinned area of ​​the substrate with tape, the coating material is diffused at the edge by the tape. After the tape is peeled off, a smooth boundary of the electrode coating without thinning is naturally formed, thus achieving precise elimination of the thinned area. This eliminates the impact of the thinned area on the quality of the rolling bonding of the electrode sheet and the electrolyte layer. Furthermore, the excess electrode coating can be removed in one go by peeling off the tape, which significantly improves production efficiency and yield.

[0019] According to some embodiments of the present invention, the electrode coating curing device is disposed between the coating device and the adhesive stripping assembly;

[0020] And / or, the electrode coating curing device is disposed after the peeling assembly.

[0021] According to some embodiments of the present invention, the adhesive application assembly includes a first unwinding roller and a first pressure roller. The first unwinding roller is used to unwind adhesive tape, and the first pressure roller is used to adhere the adhesive tape unwinding by the first unwinding roller to the substrate to form the coating area of ​​the thinning zone.

[0022] And / or, the peeling assembly includes a first take-up roller for taking up the coated substrate tape to peel off the tape.

[0023] The advantages are: the present invention achieves continuous and automated tape bonding by cooperating the first unwinding roller and the first pressure roller, ensuring accurate alignment between the tape and the substrate. In addition, the first winding roller achieves tape peeling without residue through tension control, avoiding damage to the substrate surface.

[0024] According to some embodiments of the present invention, the adhesive stripping assembly further includes a second pressure roller located between the coating device and the first take-up roller. The second pressure roller is used to support the adhesive tape so that the adhesive tape remains adhered to the substrate before being peeled off.

[0025] The advantage of this invention is that by utilizing the second pressure roller to form a secondary pressing support for the tape before peeling, it ensures a tight fit between the tape and the substrate before peeling, and avoids the tape being removed from the substrate surface by the first take-up roller before or during the coating process, which would cause the tape to fail to isolate the electrode coating on the substrate surface.

[0026] According to some embodiments of the present invention, the trimming device includes a scraper, the coating device and the scraper are arranged sequentially along the conveying direction of the conveying device, and the scraper is used to scrape off the thinned area of ​​the electrode coating on the substrate;

[0027] Alternatively, the trimming device includes a laser, and the coating device and the laser are arranged sequentially along the conveying direction of the conveying device. The laser is used to etch the thinned area of ​​the electrode coating on the substrate to eliminate the thinned area.

[0028] The advantages of this invention are: by setting a scraper, the scraper can quickly remove the thinned area of ​​the electrode coating through mechanical scraping, thereby eliminating the impact of the thinned area on the quality of the rolling bonding of the electrode sheet and the electrolyte layer; or by setting a laser, the laser can perform non-contact processing of the electrode coating of the substrate by etching, avoiding mechanical stress damage to the electrode sheet, and can accurately remove the thinned area of ​​the electrode coating, thereby eliminating the impact of the thinned area on the quality of the rolling bonding of the electrode sheet and the electrolyte layer.

[0029] According to some embodiments of the present invention, the trimming device includes a roller cutting mechanism. The coating device and the roller cutting mechanism are arranged sequentially along the conveying direction of the conveying device. The roller cutting mechanism is used to remove the thinned area of ​​the electrode coating on the substrate and the area of ​​the substrate corresponding to the thinned area.

[0030] The advantages are: by setting up a roller cutting mechanism, this utility model can, on the one hand, quickly remove the thinned area of ​​the electrode coating on the substrate, thereby eliminating the influence of the thinned area on the quality of the rolling and bonding of the electrode sheet and the electrolyte layer; on the other hand, the roller cutting mechanism simultaneously removes the thinned area of ​​the electrode coating and the substrate area corresponding to the thinned area, forming a regular electrode edge contour. The cut of the substrate after removal can be used as a positioning reference for subsequent assembly processes, improving the assembly accuracy of solid-state batteries.

[0031] According to some embodiments of the present invention, the electrode coating curing device is disposed between the coating device and the trimming device;

[0032] And / or, the electrode coating curing device is disposed after the trimming device.

[0033] According to some embodiments of the present invention, the electrode coating curing device includes a drying mechanism, which is located between the coating device and the adhesive layer bonding device, and is used to dry the electrode coating on the substrate.

[0034] The drying mechanism includes a box through which the substrate passes and a drying medium output module disposed within the box. The drying medium output module includes a hot air output component, a microwave heating component, an infrared heating component, and / or a laser heating component.

[0035] The advantages of this invention are: by using a drying mechanism to dry the substrate after coating and before bonding the electrode layer, it is beneficial to improve the curing efficiency of the electrode coating on the substrate, avoid the interface migration of the incompletely cured electrode coating during the bonding of the adhesive layer, ensure the interfacial bonding strength between the adhesive layer and the electrode coating, and improve the quality of solid-state batteries. At the same time, by setting the drying mechanism as a box through which the substrate passes and setting the drying medium output module inside the box, the box can effectively prevent the drying medium output by the drying medium output module from leaking out, ensuring the drying temperature inside the box is stable, thereby ensuring the curing effect.

[0036] According to some embodiments of the present invention, the coating device is used to coat both sides of the substrate, and two trimming devices are provided, each of which is used to eliminate the thinning area of ​​the electrode coating on both sides of the substrate.

[0037] The advantages of this invention are: by coating both sides of the substrate with a coating device, electrode coatings are formed on both sides of the substrate to meet the requirements of bonding the two sides of the electrode sheet with two electrolyte layers respectively. At the same time, two trimming devices are provided to eliminate the thinned areas of the electrode coatings on the two sides of the substrate, thereby eliminating the quality problems caused by the thickness variation of the electrode coatings on the two sides of the substrate due to the thinned areas. This avoids the formation of depressions at the thinned areas after the two sides of the electrode sheet are rolled and laminated with the electrolyte layer, thereby improving the quality of the bonding between the electrode sheet and the electrolyte layer and improving the production quality of solid-state batteries.

[0038] According to some embodiments of the present invention, the adhesive layer bonding device is configured as an adhesive frame bonding mechanism;

[0039] Alternatively, the adhesive layer bonding device can be configured as a strip adhesive layer bonding mechanism;

[0040] Alternatively, the adhesive bonding apparatus may include an adhesive application mechanism and an adhesive curing mechanism.

[0041] The advantages of this invention are: by setting the adhesive layer laminating device as an adhesive frame laminating mechanism, the adhesive frame laminating mechanism achieves edge sealing of the electrode sheet through a pre-made adhesive frame, thereby enhancing the reliability of cell packaging; or by setting the adhesive layer laminating device as a strip adhesive layer laminating mechanism, the strip adhesive layer laminating can adapt to local reinforcement needs and reduce the amount of adhesive material used; or by setting the adhesive layer laminating device as a combination of an adhesive coating mechanism and an adhesive curing mechanism, different adhesive layer patterns can be formed as needed to meet the requirements of different solid-state batteries.

[0042] According to a second aspect of the present invention, a solid-state battery production line includes an electrode forming device based on the first aspect of the present invention, which is designed for thinning zone elimination and adhesive layer lamination.

[0043] The solid-state battery production line according to the embodiments of this utility model has at least the following beneficial effects:

[0044] 1. This utility model integrates electrode forming equipment based on thinning area elimination and adhesive layer lamination into a solid-state battery production line. It uses a trimming device to directly eliminate the thinning area of ​​the electrode coating before adhesive layer lamination, thereby eliminating quality problems caused by thickness variations in the thinning area of ​​the electrode coating. This avoids the possibility of depressions or leaks in this area after the electrode and electrolyte layer are rolled and laminated, even after adhesive is applied, which could lead to short circuits or breakage. This is beneficial to improving the quality of solid-state batteries.

[0045] 2. This utility model uses an electrode coating curing device to cure the electrode coating formed on the substrate, thereby ensuring that the electrode coating on the substrate can be cured in a timely manner and avoiding the shape and boundary of the electrode coating being affected by untimely curing.

[0046] 3. This utility model uses an adhesive layer bonding device to perform surface treatment on the electrode sheet, which can further enhance the structural stability of the electrode sheet and improve the bonding force of subsequent roll bonding, thereby improving the safety and quality of solid-state batteries.

[0047] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0048] To more clearly illustrate the technical solutions of the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0049] Figure 1 This is a schematic diagram of the structure of the coated electrode sheet according to an embodiment of the present invention;

[0050] Figure 2 This is a schematic diagram of the electrode forming equipment based on thinning zone elimination and adhesive layer lamination according to an embodiment of the present invention;

[0051] Figure 3 This is a schematic diagram of another embodiment of the electrode forming equipment based on thinning zone elimination and adhesive layer lamination, which is an embodiment of the present utility model.

[0052] Reference numerals: 100-Conveying device, 110-Substrate, 120-Coating device, 130-Electrode coating, 140-Treating device, 150-Thinning zone, 160-Adhesive layer laminating device, 170-Adhesive application assembly, 180-Adhesive peeling assembly, 190-First unwinding roller, 200-First pressure roller, 210-First take-up roller, 220-Second pressure roller, 230-Drying mechanism. Detailed Implementation

[0053] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0054] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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 this utility model.

[0055] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" and "second" are mentioned, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of the indicated technical features.

[0056] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation, connection, and linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0057] The following is in conjunction with the appendix Figure 1 -Appendix Figure 3 This invention describes an electrode forming equipment and a solid-state battery production line based on thinning zone elimination and adhesive layer lamination according to embodiments of the present invention.

[0058] Reference Figure 1 In the coating process of solid-state batteries, after coating the substrate 110 with a coating material, due to the fluidity of the coating material and the non-uniformity of the coating material itself, a thinning area 150 will be formed at the edge of the electrode coating 130 along the width direction of the substrate 110. The thickness of the thinning area 150 gradually decreases from the inside to the outside, that is, the electrode coating 130 is in a gradually thinning state at the thinning area 150.

[0059] In the production of solid-state batteries, it is necessary to laminate the electrode sheet coated with electrode coating 130 to the electrolyte layer. Due to the presence of the thinned area 150 of electrode coating 130, after the electrode sheet and electrolyte layer are laminated, a depression will be formed in the area corresponding to the thinned area 150, which increases the risk of short circuit and is not conducive to improving the quality of solid-state batteries.

[0060] In order to eliminate the influence of the thinned area 150 of the electrode coating 130 on the bonding quality of the electrode and electrolyte layer, this utility model provides a solid-state battery production line. Specifically, the solid-state battery production line mainly includes electrode forming equipment based on thinning area elimination and adhesive layer bonding.

[0061] Reference Figure 2 and Figure 3 In this embodiment, the electrode forming equipment and solid-state battery production line based on thinning area elimination and adhesive layer lamination mainly include a conveying device 100, a coating device 120, a trimming device 140, an electrode coating curing device, and an adhesive layer lamination device 160.

[0062] For the conveying device 100, the conveying device 100 is used to convey the substrate 110.

[0063] Specifically, the substrate 110 can be a copper foil sheet, and the conveying device 100 can include a second unwinding roller, a plurality of tensioning rollers and a driving component. The initial state of the substrate 110 can be a roll. The roll substrate 110 is wound around the second unwinding roller. The second unwinding roller is used to support the unwinding of the roll substrate 110. The tensioning rollers are used to tension the unwound substrate 110 and change the conveying direction of the substrate 110 to prevent the substrate 110 from wrinkling. The driving component is used to drive the second unwinding roller to rotate or drive the tensioning rollers to rotate, so as to drive the substrate 110 to be continuously conveyed.

[0064] The coating apparatus 120 is used to coat the substrate 110 on the conveying device 100 to form an electrode coating 130 on the substrate 110.

[0065] Specifically, the coating device 120 can cooperate with the coating supply mechanism through a coating roller, coating blade or coating die to achieve coating on the substrate 110. Its structure and coating principle are conventional technical means in this field and will not be described in detail here.

[0066] For trimming device 140, trimming device 140 is used to remove the thinned area 150 of electrode coating 130 on substrate 110 to obtain electrode sheet.

[0067] It is understood that this embodiment directly eliminates the thinned area 150 of the electrode coating 130 by setting the trimming device 140 before performing adhesive layer lamination, thereby eliminating the quality problems caused by the thickness change of the thinned area 150 of the electrode coating 130. This avoids the possibility of depressions or leaks in this area after the electrode sheet and electrolyte layer are rolled and laminated, even after adhesive is applied, which could lead to short circuits or breakage. This is beneficial to improving the quality of solid-state batteries.

[0068] Reference Figure 2In a first embodiment of the trimming device 140, the trimming device 140 may include an adhesive application assembly 170 and an adhesive peeling assembly 180. The adhesive application assembly 170, the coating device 120 and the adhesive peeling assembly 180 are arranged sequentially along the conveying direction of the conveying device 100. The adhesive application assembly 170 is used to apply adhesive tape to a portion of the area to be coated on the substrate 110 where a thinning area 150 is formed. The adhesive peeling assembly 180 is used to peel off the adhesive tape from the coated substrate 110 to eliminate the thinning area 150 of the electrode coating 130 on the substrate 110.

[0069] It is understood that in this embodiment, by using the adhesive application component 170 to pre-cover the portion of the coating area to be coated on the substrate 110 forming the thinning area 150 with adhesive tape, the adhesive tape physically isolates the diffusion of the coating material in the edge area. After the adhesive tape is peeled off, a smooth boundary of the electrode coating 130 without thinning is naturally formed, thereby achieving precise elimination of the thinning area 150. This eliminates the impact of the thinning area 150 on the quality of the rolling bonding of the electrode sheet and the electrolyte layer. Furthermore, the excess electrode coating 130 can be removed in one go by peeling off the adhesive tape, significantly improving production efficiency and yield.

[0070] It should be explained that the area to be coated is the coating area planned on the substrate 110. After the coating is applied to the area to be coated, a thinning area 150 will be formed at the edge of the electrode coating 130. The tape is pre-covered and adhered to this part of the area to be coated that will form the thinning area 150.

[0071] In some specific embodiments, in order for the electrode coating curing device to cure the electrode coating 130 on the substrate 110, the electrode coating curing device is disposed between the coating device 120 and the peeling assembly 180; and / or, the electrode coating curing device is disposed after the peeling assembly 180.

[0072] Specifically, the adhesive application assembly 170 includes a first unwinding roller 190 and a first pressure roller 200. The first unwinding roller 190 is used to unwind the adhesive tape, and the first pressure roller 200 is used to apply the adhesive tape unwinding from the first unwinding roller 190 onto the substrate 110 to form a thinning area 150 to be coated. Thus, the continuous and automated application of the adhesive tape is achieved through the cooperation of the first unwinding roller 190 and the first pressure roller 200, ensuring the precise alignment of the adhesive tape and the substrate 110.

[0073] In addition, the peeling assembly 180 includes a first take-up roller 210, which is used to take up the adhesive tape of the coated substrate 110 to peel off the adhesive tape. Thus, the first take-up roller 210 achieves peeling off the adhesive tape without residue by tension control, avoiding damage to the surface of the substrate 110.

[0074] Furthermore, the peeling assembly 180 also includes a second pressure roller 220 located between the coating device 120 and the first take-up roller 210. The second pressure roller 220 is used to support the tape so that the tape remains adhered to the substrate 110 before peeling it off.

[0075] It is understood that this embodiment utilizes the second pressure roller 220 to form a secondary pressing support for the tape before tape peeling, ensuring a tight fit between the tape and the substrate 110 before peeling, and preventing the tape from being removed from the surface of the substrate 110 by the first take-up roller 210 before or during the coating process, which would cause the tape to fail to isolate the electrode coating 130 on the surface of the substrate 110.

[0076] Reference Figure 3 In a second embodiment of the trimming device 140, the trimming device 140 may include a scraper, a coating device 120, and the scraper arranged sequentially along the conveying direction of the conveying device 100. The scraper is used to scrape off the thinned area 150 of the electrode coating 130 on the substrate 110. Thus, by setting the scraper, the scraper can quickly remove the thinned area 150 of the electrode coating 130 by mechanical scraping, thereby eliminating the influence of the thinned area 150 on the quality of the rolling and bonding of the electrode sheet and the electrolyte layer.

[0077] Refer again Figure 3 In a third embodiment of the trimming device 140, the trimming device 140 may include a laser, a coating device 120, and the laser arranged sequentially along the conveying direction of the conveying device 100. The laser is used to etch the thinned area 150 of the electrode coating 130 on the substrate 110 to eliminate the thinned area 150. Thus, by setting the laser, the laser performs non-contact processing on the electrode coating 130 of the substrate 110 by etching, avoiding mechanical stress damage to the electrode sheet, and accurately removing the thinned area 150 of the electrode coating 130, thereby eliminating the influence of the thinned area 150 on the quality of the rolling bonding of the electrode sheet and the electrolyte layer.

[0078] Refer again Figure 3 In a fourth embodiment of the trimming device 140, the trimming device 140 may include a roller cutting mechanism. The coating device 120 and the roller cutting mechanism are arranged sequentially along the conveying direction of the conveying device 100. The roller cutting mechanism is used to cut off the thinning area 150 of the electrode coating 130 on the substrate 110 and the area of ​​the substrate 110 corresponding to the thinning area 150.

[0079] Understandably, on the one hand, the roll cutting mechanism can quickly remove the thinned area 150 of the electrode coating 130 on the substrate 110, thereby eliminating the influence of the thinned area 150 on the quality of the rolling and bonding of the electrode sheet and the electrolyte layer. On the other hand, the roll cutting mechanism simultaneously removes the thinned area 150 of the electrode coating 130 and the corresponding area of ​​the substrate 110, forming a regular electrode edge contour. The cut of the substrate 110 after removal can serve as a positioning reference for subsequent assembly processes, improving the assembly accuracy of solid-state batteries.

[0080] In some specific embodiments, in order for the electrode coating curing device to cure the electrode coating 130 on the substrate 110, the electrode coating curing device may be disposed between the coating device 120 and the trimming device 140; and / or, the electrode coating curing device may be disposed after the trimming device 140.

[0081] Specifically, the electrode coating curing device can be located after the coating device and before the doctor blade, laser, or roll cutting mechanism; the electrode coating curing device can also be located after the doctor blade, laser, or roll cutting mechanism.

[0082] In some specific embodiments, in order to meet the requirement that the two opposing sides of the electrode are respectively bonded to two electrolyte layers, the coating device 120 is used to coat the two opposing sides of the substrate 110, so that the two opposing sides of the substrate 110 are respectively formed with electrode coating 130.

[0083] Furthermore, two trimming devices 140 are provided. The two trimming devices 140 are respectively used to eliminate the thinning area 150 of the electrode coating 130 on the two opposing sides of the substrate 110, thereby eliminating the quality problems caused by the thickness change of the thinning area 150 of the electrode coating 130 on the two opposing sides of the substrate 110, avoiding the formation of depressions at the thinning area 150 after the two opposing sides of the electrode sheet are rolled and laminated with the electrolyte layer, thereby improving the quality of the electrode sheet and electrolyte layer lamination, and thus improving the production quality of solid-state batteries.

[0084] In some specific embodiments, in order to avoid mutual interference when the coating device 120 coats the two opposing sides of the substrate 110, the coating device 120 may include two coating components, which are arranged along the conveying direction of the conveying device 100, and the two coating components coat the two opposing sides of the substrate 110 respectively.

[0085] The electrode coating curing apparatus is used to cure the electrode coating 130 formed on the substrate 110.

[0086] In this embodiment, an electrode coating curing device is used to cure the electrode coating 130 formed on the substrate 110, thereby ensuring that the electrode coating 130 on the substrate 110 can be cured in a timely manner, and avoiding the shape and boundary of the electrode coating 130 being affected by untimely curing.

[0087] Specifically, the electrode coating curing device includes a drying mechanism 230, which is located between the coating device 120 and the adhesive layer bonding device 160. The drying mechanism 230 is used to dry the electrode coating 130 on the substrate 110. The drying mechanism 230 includes a box through which the substrate 110 passes and a drying medium output module disposed in the box. The drying medium output module includes a hot air output component, a microwave heating component, an infrared heating component, and / or a laser heating component.

[0088] It is understandable that this embodiment utilizes the drying mechanism 230 to dry the substrate 110 after coating and before bonding the electrode adhesive layer. This helps to improve the curing efficiency of the electrode coating 130 on the substrate 110, prevents incompletely cured electrode coating 130 from migrating during adhesive layer bonding, ensures the interfacial bonding strength between the adhesive layer and the electrode coating 130, and improves the quality of solid-state batteries. At the same time, by setting the drying mechanism 230 as a box through which the substrate 110 passes and setting the drying medium output module inside the box, the box can effectively prevent the drying medium output by the drying medium output module from leaking out, ensuring a stable drying temperature inside the box, thereby ensuring the curing effect.

[0089] For the adhesive layer bonding device 160, the adhesive layer bonding device 160 is used to bond an adhesive layer to the electrode sheet.

[0090] It is understood that by setting up the adhesive layer bonding device 160 to perform surface treatment on the electrode sheet in this embodiment, the structural stability of the electrode sheet can be further enhanced, the bonding force of subsequent roll bonding can be improved, thereby improving the safety and quality of solid-state batteries.

[0091] In a first embodiment of the adhesive layer bonding device 160, the adhesive layer bonding device 160 can be configured as an adhesive frame bonding mechanism, thereby achieving edge sealing of the electrode sheet through a pre-made adhesive frame, enhancing the reliability of the cell packaging.

[0092] In a second embodiment of the adhesive layer bonding device 160, the adhesive layer bonding device 160 can be configured as a strip adhesive layer bonding mechanism, thereby enabling the strip adhesive layer bonding to adapt to local reinforcement needs and reduce the amount of adhesive material used.

[0093] In a third embodiment of the adhesive layer bonding apparatus 160, the adhesive layer bonding apparatus 160 may include an adhesive coating mechanism and an adhesive curing mechanism, thereby enabling the adhesive coating mechanism to form different adhesive layer patterns as needed to meet the requirements of different solid-state batteries.

[0094] In the description of this specification, references to terms such as "an embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0095] The terms "first," "second," "third," "fourth," etc. (if applicable) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments described herein can be implemented in a sequence other than that illustrated or described herein.

[0096] It should also be noted that, in the description of this specification, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0097] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may also include other steps or units that are not explicitly listed or that are inherent to such processes, methods, products, or apparatus.

[0098] Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0099] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. An electrode forming device based on thinning zone elimination and adhesive layer lamination, characterized in that, include: A conveying device (100) is used to convey a substrate (110). A coating apparatus (120) is used to coat the substrate (110) on the conveying device (100) to form an electrode coating (130) on the substrate (110). A trimming device (140) is used to remove the thinned area (150) of the electrode coating (130) on the substrate (110) to obtain an electrode sheet; An electrode coating curing apparatus is used to cure the electrode coating (130) formed on the substrate (110); Adhesive layer bonding device (160) is used to bond adhesive layers to the electrode sheet.

2. The electrode forming equipment based on thinning zone elimination and adhesive layer lamination according to claim 1, characterized in that, The trimming device (140) includes an adhesive application assembly (170) and an adhesive peeling assembly (180). The adhesive application assembly (170), the coating device (120), and the adhesive peeling assembly (180) are arranged sequentially along the conveying direction of the conveying device (100). The adhesive application assembly (170) is used to apply adhesive tape to a portion of the area to be coated on the substrate (110) forming the thinning area (150). The adhesive peeling assembly (180) is used to peel off the adhesive tape from the coated substrate (110) to eliminate the thinning area (150) of the electrode coating (130) on the substrate (110).

3. The electrode forming equipment based on thinning zone elimination and adhesive layer lamination according to claim 2, characterized in that, The electrode coating curing device is disposed between the coating device (120) and the peeling assembly (180); And / or, the electrode coating curing device is disposed after the peeling assembly (180).

4. The electrode forming equipment based on thinning zone elimination and adhesive layer lamination according to claim 2, characterized in that, The adhesive application assembly (170) includes a first unwinding roller (190) and a first pressure roller (200). The first unwinding roller (190) is used to unwind the adhesive tape, and the first pressure roller (200) is used to adhere the adhesive tape unwinding by the first unwinding roller (190) to the substrate (110) to form the coating area of ​​the thinning zone (150). And / or, the peeling assembly (180) includes a first take-up roller (210) for taking up the adhesive tape of the coated substrate (110) to peel off the adhesive tape.

5. The electrode forming equipment based on thinning zone elimination and adhesive layer lamination according to claim 4, characterized in that, The peeling assembly (180) further includes a second pressure roller (220) located between the coating device (120) and the first take-up roller (210), the second pressure roller (220) being used to support the tape so that the tape remains adhered to the substrate (110) before being peeled off.

6. The electrode forming equipment based on thinning zone elimination and adhesive layer lamination according to claim 1, characterized in that, The trimming device (140) includes a scraper. The coating device (120) and the scraper are arranged sequentially along the conveying direction of the conveying device (100). The scraper is used to scrape off the thinned area (150) of the electrode coating (130) on the substrate (110). Alternatively, the trimming device (140) includes a laser, and the coating device (120) and the laser are arranged sequentially along the conveying direction of the conveying device (100). The laser is used to etch the thinned area (150) of the electrode coating (130) on the substrate (110) to eliminate the thinned area (150).

7. The electrode forming equipment based on thinning zone elimination and adhesive layer lamination according to claim 1, characterized in that, The trimming device (140) includes a roller cutting mechanism. The coating device (120) and the roller cutting mechanism are arranged sequentially along the conveying direction of the conveying device (100). The roller cutting mechanism is used to cut off the thinned area (150) of the electrode coating (130) on the substrate (110) and the area of ​​the substrate (110) corresponding to the thinned area (150).

8. The electrode forming equipment based on thinning zone elimination and adhesive layer lamination according to claim 6 or 7, characterized in that, The electrode coating curing device is disposed between the coating device (120) and the trimming device (140); And / or, the electrode coating curing device is disposed after the trimming device (140).

9. The electrode forming equipment based on thinning zone elimination and adhesive layer lamination according to claim 1, characterized in that, The electrode coating curing device includes a drying mechanism (230), which is located between the coating device (120) and the adhesive layer bonding device (160). The drying mechanism (230) is used to dry the electrode coating (130) on the substrate (110). The drying mechanism (230) includes a housing through which the substrate (110) passes and a drying medium output module disposed within the housing. The drying medium output module includes a hot air output component, a microwave heating component, an infrared heating component, and / or a laser heating component.

10. The electrode forming equipment based on thinning zone elimination and adhesive layer lamination according to claim 1, characterized in that, The coating device (120) is used to coat the two opposing sides of the substrate (110). Two trimming devices (140) are provided, and the two trimming devices (140) are used to remove the thinned areas (150) of the electrode coating (130) on the two opposing sides of the substrate (110).

11. The electrode forming equipment based on thinning zone elimination and adhesive layer lamination according to claim 1, characterized in that, The adhesive layer bonding device (160) is configured as an adhesive frame bonding mechanism; Alternatively, the adhesive layer bonding device (160) may be configured as a strip adhesive layer bonding mechanism; Alternatively, the adhesive bonding apparatus (160) may include an adhesive application mechanism and an adhesive curing mechanism.

12. A solid-state battery production line, characterized in that, The electrode forming equipment based on thinning zone elimination and adhesive layer lamination as described in any one of claims 1 to 11.

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