Dry electrode rolling and solid electrolyte covering all-in-one machine and solid-state battery production line

Abstract

The utility model discloses a dry electrode rolling and solid electrolyte covering all-in-one machine and a solid-state battery production line. The all-in-one machine comprises a pole piece thinning rolling device and a solid electrolyte covering rolling device which are sequentially arranged along a pole piece conveying path, the pole piece thinning and rolling device comprises a pair of thinning rollers, and the thinning rollers clamp and roll the pole piece; the solid electrolyte covering and rolling device comprises a solid electrolyte supply mechanism and a covering and rolling mechanism, wherein the covering and rolling mechanism is used for transferring the solid electrolyte to the pole piece. According to the dry electrode rolling and solid electrolyte covering all-in-one machine and the solid-state battery production line disclosed by the utility model, the problem that a coating slit is blocked by a solid electrolyte material can be avoided, meanwhile, the thickness of a pole piece is reduced, and the influence on the performance of a solid-state battery is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of solid battery production equipment, especially relates to a dry electrode roll and solid electrolyte covering integrated machine and solid battery production line. BACKGROUND

[0002] Solid lithium metal battery is the battery using solid electrolyte, wherein, the solid electrolyte replaces the diaphragm and solid electrolyte used in traditional lithium ion battery, so that the lithium metal anode replaces the graphite or silicon anode in traditional lithium ion battery.

[0003] Since the energy density of lithium metal anode is higher than that of traditional anode, the solid lithium metal battery is allowed to store more energy in the same volume.

[0004] Since the solid electrolyte material has the characteristics of no support, the forming mode of the solid electrolyte layer on the pole piece is usually spraying, that is, the solid electrolyte powder is sprayed on the surface of the pole piece by spraying.

[0005] However, in the spraying forming mode, the solid electrolyte material is easy to block the coating gap of the spraying mechanism, so that the solid electrolyte layer on the surface of the pole piece is not uniform and the forming speed is low.

[0006] At the same time, if the pole piece is manufactured by using dry coating process, compared with the conventional electrode, the thickness of the pole piece is larger, which will have adverse effect on the performance of the solid battery. INVENTION CONTENTS

[0007] The utility model aims at solving one of the technical problems existing in the prior art. To this end, the utility model provides a dry electrode roll and solid electrolyte covering integrated machine, which can avoid the problem of solid electrolyte material blocking the coating gap, and at the same time, reduce the thickness of the pole piece and reduce the influence on the performance of the solid battery.

[0008] The utility model further provides a solid battery production line with the above-mentioned dry electrode roll and solid electrolyte covering integrated machine.

[0009] According to the dry electrode roll and solid electrolyte covering integrated machine of the first aspect embodiment of the utility model, the blank of the dry electrode is a pole piece, the integrated machine comprises a pole piece thinning roll pressing device and a solid electrolyte covering roll pressing device arranged in sequence along the pole piece conveying path;

[0010] The pole piece thinning roll pressing device comprises a pair of thinning rolls, and the thinning rolls clamp and press the pole piece;

[0011] The solid-state electrolyte laminating and rolling device comprises a solid-state electrolyte supply mechanism for providing an isolation film having a solid-state electrolyte and a laminating and rolling mechanism for transferring the solid-state electrolyte on the isolation film to the pole piece.

[0012] The dry electrode rolling and solid-state electrolyte laminating all-in-one machine and the solid-state battery production line have at least the following beneficial effects:

[0013] The dry electrode rolling and solid-state electrolyte laminating all-in-one machine and the solid-state battery production line have at least the following beneficial effects:

[0014] The dry electrode rolling and solid-state electrolyte laminating all-in-one machine and the solid-state battery production line have at least the following beneficial effects:

[0015] The dry electrode rolling and solid-state electrolyte laminating all-in-one machine and the solid-state battery production line have at least the following beneficial effects.

[0016] The dry electrode rolling and solid-state electrolyte laminating all-in-one machine and the solid-state battery production line have at least the following beneficial effects.

[0017] Advantageously, the dry electrode rolling and solid-state electrolyte laminating all-in-one machine and the solid-state battery production line have at least the following beneficial effects.

[0018] The dry electrode rolling and solid-state electrolyte laminating all-in-one machine and the solid-state battery production line have at least the following beneficial effects.

[0019] Meanwhile, if there is pressure, the solid-state electrolyte is easy to flow and spread along the pole piece, so that the solid-state electrolyte is easy to be evenly distributed on the pole piece.

[0020] The utility model discloses a preheating assembly can heat the pole piece, raise the temperature of pole piece, make pole piece have higher activity, improve the ability of pole piece connection solid-state electrolyte, make solid-state electrolyte more easily transfer from the isolation film to the pole piece.

[0021] The utility model discloses a prepressing assembly and preheating assembly are set up, and the process of solid-state electrolyte transfer to the pole piece is also decomposed, avoids the transfer process to concentrate in the place of covering assembly, and thus, solid-state electrolyte and pole piece have sufficient time and suitable temperature to contact and connect, and the transfer quality is improved.

[0022] The utility model discloses a prepressing assembly and preheating assembly are set up, and the process of solid-state electrolyte transfer to the pole piece is also decomposed, avoids the transfer process to concentrate in the place of covering assembly, and thus, solid-state electrolyte and pole piece have sufficient time and suitable temperature to contact and connect, and the transfer quality is improved.

[0023] That is, the covering assembly does not need to increase the diameter of the roller and reduce the speed of the roller to prolong the time of extrusion contact of the solid-state electrolyte and the pole piece, and the time of extrusion contact of the solid-state electrolyte and the pole piece is equal to the arc length of the outer periphery of the roller divided by the linear speed of the roller, the arc length of the outer periphery of the roller is positively correlated with the diameter of the roller, thus, the roller of the covering assembly of the utility model can adopt a smaller diameter, which is beneficial to miniaturization of the covering assembly, and meanwhile, the roller of the covering assembly of the utility model can also adopt a higher linear speed, that is, the forming speed is improved.

[0024] The utility model discloses a covering assembly is set up, and thus, on the basis of pre-extrusion and preheating of the solid-state electrolyte and the pole piece, the solid-state electrolyte and the pole piece are extruded, so that the solid-state electrolyte fully flows and spreads, is evenly distributed on the pole piece, and the transfer is completed with high quality, meeting the requirements of solid-state battery production and manufacturing.

[0025] Meanwhile, before the covering assembly performs the transfer, the solid-state electrolyte has been heated and initially contacted with the pole piece, the required pressure and heat for the transfer are reduced, the requirements of the covering assembly are lowered, and it is beneficial to transfer the electrolyte by using a smaller diameter covering roller, improving the roller pressure precision.

[0026] Compared with the spray forming mode, the solid-state electrolyte does not need to pass through the coating slit of the spraying assembly, and thus, the problem of blockage does not occur.

[0027] According to the dry electrode roll pressing and solid electrolyte laminating integrated machine of the first aspect of the present application, the number of the isolation films is two, the pole piece can be located between the two isolation films, one of the isolation films transfers the solid electrolyte to one side of the pole piece, and the other isolation film transfers the solid electrolyte to the other side of the pole piece.

[0028] Beneficially, the present application sets two isolation films, so that the solid electrolyte is transferred to both sides of the pole piece, and more solid electrolyte is left on the pole piece, which helps to improve the capacity of the solid-state battery.

[0029] If only one side of the pole piece is transferred with the solid electrolyte, when the pole piece is wound, the side of the pole piece not transferred with the solid electrolyte will contact the solid electrolyte on the other side of the pole piece, but the two are not fully connected, which affects the quality of the electrode.

[0030] When both sides of the pole piece are transferred with the solid electrolyte, whether the pole piece is wound or not, both sides of the pole piece are well connected with the solid electrolyte, which is beneficial to ensure the quality of the solid-state battery.

[0031] According to the dry electrode roll pressing and solid electrolyte laminating integrated machine of the first aspect of the present application, the pre-pressing assembly includes a pair of pre-pressing rollers, and the pair of pre-pressing rollers press the isolation film and the pole piece in a clamping manner.

[0032] Beneficially, the present application sets the pre-pressing rollers, so that the isolation film and the pole piece are close to and contact each other through the extrusion of the two pre-pressing rollers, so as to connect the solid electrolyte with the pole piece, and at the same time, the movement of the isolation film and the pole piece is not affected, so that the transfer continues, and the production downtime is reduced.

[0033] According to the dry electrode roll pressing and solid electrolyte laminating integrated machine of the first aspect of the present application, the pre-heating assembly includes a pair of infrared heaters, and the pair of infrared heaters are used for heating the isolation film and the pole piece, and the space between the pair of infrared heaters allows the isolation film and the pole piece to pass through.

[0034] Beneficially, the present application sets a pair of infrared heaters, which can heat the solid electrolyte and the pole piece, improve the activity of the solid electrolyte and the pole piece, facilitate the connection of the solid electrolyte and the pole piece in one body, and improve the transfer quality.

[0035] At the same time, the infrared heater is a non-contact heating, and can also heat the inside of the material, especially, the junction of the solid electrolyte and the pole piece is heated conveniently, so that the solid electrolyte is connected with the pole piece.

[0036] According to the dry electrode roll pressing and solid electrolyte laminating integrated machine of the first aspect of the present application, the laminating assembly comprises a pair of laminating rollers, and the pair of laminating rollers press the separator film and the electrode sheet in a clamping manner, so that the solid electrolyte on the separator film is transferred to the electrode sheet.

[0037] Beneficially, the present application is provided with a pair of laminating rollers, which facilitates the extrusion of the separator film and the electrode sheet, so that the solid electrolyte that has contacted the electrode sheet closely adheres to the electrode sheet under suitable temperature conditions, and the solid electrolyte is strengthened.

[0038] According to the dry electrode roll pressing and solid electrolyte laminating integrated machine of the first aspect of the present application, the laminating assembly comprises a hydraulic cylinder that drives the laminating rollers to move closer to or away from each other.

[0039] Beneficially, the present application is provided with a hydraulic cylinder, which connects the solid electrolyte to the electrode sheet through hydraulic pressure, ensures that the solid electrolyte is connected to the electrode sheet under certain pressure conditions, and improves the forming efficiency and forming quality of the solid electrolyte connected to the electrode sheet.

[0040] According to the dry electrode roll pressing and solid electrolyte laminating integrated machine of the first aspect of the present application, the solid electrolyte laminating roll pressing device comprises a solid electrolyte supply mechanism, the solid electrolyte supply mechanism comprises a separator film unwinding assembly and a separator film winding assembly, the separator film unwinding assembly is used to unwind a raw material roll, the raw material roll is in a roll state of the separator film with the solid electrolyte, and the separator film winding assembly is used to wind a waste material roll, which is in a roll state of the separator film with the solid electrolyte transferred or removed.

[0041] Beneficially, the present application is provided with a separator film unwinding assembly and a separator film winding assembly, which reduces the occupied space of the separator film, facilitates the collection of separator film waste, and miniaturizes the solid electrolyte laminating roll pressing device, thereby reducing the floor space.

[0042] According to the dry electrode roll pressing and solid electrolyte laminating integrated machine of the first aspect of the present application, the integrated machine comprises an electrode sheet winding device, the electrode sheet winding device is used to wind the electrode sheet with the solid electrolyte transferred into a roll state, and the electrode sheet winding device comprises an electrode sheet winding assembly and a defect detector located on the incoming material side of the electrode sheet winding assembly, the defect detector is used to detect the surface quality of the solid electrolyte on the electrode sheet.

[0043] Beneficially, the present application is provided with an electrode sheet winding device, which winds the strip-shaped electrode sheet into a roll, facilitates storage, reduces the contact of the electrode sheet and the solid electrolyte with the outside world, and avoids damage.

[0044] The utility model discloses a polar piece winding assembly is set up, can wind the polar piece that the solid electrolyte has been transferred to the production, convenient storage, reduce the land space.

[0045] Meanwhile, the utility model discloses a flaw detector is set up, can also detect the surface quality of solid electrolyte to the separation of solid electrolyte and isolation film is analyzed, when the isolation film is left more solid electrolyte, can discover early, in order to adjust.

[0046] The solid battery production line according to the second aspect of the utility model discloses a dry electrode roller pressing and solid electrolyte laminating integrated machine.

[0047] Beneficially, the utility model discloses a polar piece thinning roller pressing device, can reduce the thickness of polar piece, makes polar piece thinner and thickness size accurate, thereby, reduces the influence of polar piece thickness difference on battery performance.

[0048] The utility model discloses a solid electrolyte laminating roller pressing device, on the one hand, eliminates the defect produced by spraying mode, on the other hand, improves the forming efficiency and forming quality of solid electrolyte connecting polar piece, helps to improve the production efficiency and quality of solid battery.

[0049] The additional aspects and advantages of the utility model will be partly given in the following description, partly will become obvious from the following description, or be understood by the practice of the utility model. DRAWINGS

[0050] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, the following will be briefly introduced to the drawing needed to be used in the embodiment or prior art description, obviously, the drawing in the following description only is some embodiments of the utility model, for ordinary skilled person in the art comes, under the premise of not paying the creative labor, can also obtain other drawings according to these drawings.

[0051] Figure 1 It is the structure schematic drawing of the integrated machine of the solid battery production line of the utility model embodiment;

[0052] Figure 2 It is Figure 1 The structure schematic drawing of the solid electrolyte laminating roller pressing device shown.

[0053] Reference signs: 100 - pre-press assembly, 110 - pre-heating assembly, 120 - laminating assembly, 130 - pre-press roller, 140 - infrared heater, 150 - laminating roller, 160 - hydraulic cylinder, 170 - release film unwinding assembly, 180 - release film winding assembly, 190 - pole piece winding assembly, 200 - defect detector, 210 - pole piece thinning roller pressing device, 220 - pole piece tensioning mechanism, 230 - thickness detection mechanism. DETAILED DESCRIPTION

[0054] Embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are only used to explain the present application and cannot be understood as a limitation of the present application.

[0055] In the description of the present application, it should be understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as a limitation of the present application. The indicated mechanism or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present application.

[0056] In the description of the present application, the meaning of several is one or more, and the meaning of multiple is more than two, greater than, less than, more than, etc. are understood as not including the number, above, below, etc. are understood as including the number. If the first and second are described, this is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of indicated technical features.

[0057] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting, connection and connection" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0058] The solid-state electrolyte laminating roller pressing device and the solid-state battery production line according to the embodiments of the present application will be described below with reference to the drawings.

[0059] Reference Figure 1 The present application aims to provide an embodiment of a solid-state battery production line.

[0060] In the embodiment, the solid-state battery production line comprises a pole piece production device and a dry electrode rolling and solid-state electrolyte laminating integrated machine.

[0061] The pole piece production device can comprise a dry coating related device. The dry coating related device can perform dry coating treatment on the surface of the pole piece, can simplify the manufacturing steps of the positive and negative electrodes, reduce the production cost and energy consumption, is friendly to the environment, facilitates large-scale production, and the pole piece produced by dry coating has higher performance, which is beneficial to improving the energy density, cycle performance and durability of the battery.

[0062] Since the embodiment does not involve improvement of the dry powder coating device, the utility model is not illustrated and described in detail, but this does not affect the clarity and integrity of the scheme.

[0063] The dry electrode rolling and solid-state electrolyte laminating integrated machine comprises a pole piece thinning and rolling device 210 and a solid-state electrolyte laminating and rolling device and a pole piece winding device.

[0064] When the pole piece is coated by dry coating, the pole piece enters the pole piece thinning and rolling device 210. The pole piece thinning and rolling device 210 comprises a pair of thinning rollers. The thinning rollers clamp and roll the pole piece, so that the thickness of the pole piece is small and uniform. Therefore, when the electrolyte is transferred subsequently, the thickness of the solid-state electrolyte on the pole piece can be guaranteed, the consistency of production is improved, and the quality of the battery is guaranteed.

[0065] That is, the pole piece thinning and rolling device 210 can roll the pole piece after dry coating, so that the thickness of the pole piece is small and the precision is high. Therefore, the thickness of the pole piece can be accurately controlled, the performance of the battery is not affected by the large thickness or large thickness deviation of the pole piece, and especially, the subsequent lamination of the electrolyte and the pole piece is directly avoided.

[0066] In some specific embodiments of the utility model, the pole piece thinning and rolling device 210 can further comprise a pole piece tensioning mechanism 220. The pole piece tensioning mechanism 220 is arranged on the discharge side of the thinning roller, so as to avoid the pole piece from being loose and bent, avoid the pole piece from being damaged, and reduce the influence on the quality of the battery.

[0067] In some specific embodiments of the utility model, the pole piece tensioning mechanism 220 can comprise a tensioning roller and a swing arm for installing the tensioning roller. Under the action of gravity or spring force, the swing arm swings, the tensioning roller presses the pole piece, so that the pole piece maintains a certain tension and avoids relaxation.

[0068] In some specific embodiments of the utility model, the pole piece thinning roller pressing device 210 can further include a thickness detection mechanism 230, the thickness detection mechanism 230 is arranged on the discharge side of the thinning roller, and the thickness detection mechanism 230 is arranged on the incoming material side of the pole piece tensioning mechanism 220, so that the thickness of the pole piece can be detected early, and the pole piece thickness that does not meet the requirements or exists can be found early and adjusted.

[0069] In some specific embodiments of the utility model, the thickness detection mechanism 230 can include appearance detection content to ensure the incoming material quality of the pole piece, avoid using poor pole pieces, and reduce production loss.

[0070] In some specific embodiments of the utility model, the thickness detection mechanism 230 can include a detector and a plurality of positioning rollers and guide rollers, the two positioning rollers are arranged at the same height, so that the detector detects the pole piece vertically, and the detection quality is improved, and the guide rollers are located below the positioning rollers and on the incoming material side and the discharge side of the two positioning rollers, so that the pole piece can be conveniently guided to the positioning rollers.

[0071] In order to arrange the solid-state electrolyte on the pole piece, the prior art usually applies a spray forming method, that is, a spraying assembly is used to drive the solid-state electrolyte to flow by using gas, so that the solid-state electrolyte is sprayed on the pole piece, but the spraying assembly usually has a coating slot to improve the airflow speed, but the solid-state electrolyte is easy to block the coating slot, especially to locally block the coating slot, so that part of the pole piece is not covered with the solid-state electrolyte, and the distribution of the solid-state electrolyte on the pole piece is also greatly different and uneven, which seriously affects the performance and quality of the solid-state electrolyte.

[0072] For this purpose, with reference to Figure 1 and Figure 2 The utility model also aims at providing a solid-state electrolyte laminating roller pressing device, which can avoid the problem of solid-state electrolyte material blocking the coating slot, and make the solid-state electrolyte layer on the pole piece uniformly distributed, and improve the forming speed.

[0073] In this embodiment, if the incoming material thickness of the pole piece is qualified, the

[0074] In this embodiment, the solid-state electrolyte laminating roller pressing device is used to transfer the solid-state electrolyte on the isolation film to the pole piece, and the solid-state electrolyte laminating roller pressing device includes a solid-state electrolyte supply mechanism and a laminating roller pressing mechanism, the solid-state electrolyte supply mechanism is used to provide the isolation film, the isolation film has the solid-state electrolyte, the laminating roller pressing mechanism laminates the isolation film and the pole piece together, and can transfer the solid-state electrolyte to the pole piece, and the laminating roller pressing mechanism includes a pre-pressing assembly 100, a pre-heating assembly 110 and a laminating assembly 120.

[0075] The pre-pressing assembly 100 is arranged between the pre-heating assembly 110 and the laminating assembly 120, the pre-pressing assembly 100 is used to make the isolation film and the pole piece change from a separated state to a contact state, the pre-heating assembly 110 is used to heat the isolation film and the pole piece in the contact state, and the laminating assembly 120 is used to extrude the heated isolation film and pole piece, so that the solid-state electrolyte on the isolation film is transferred to the pole piece, and the solid-state electrolyte can be separated from the isolation film.

[0076] In summary, first, the pre-pressing assembly 100 is arranged to make the isolation film and the pole piece contact and pre-extrude, which can eliminate the gap between the isolation film and the pole piece, facilitate the contact and connection of the solid-state electrolyte with the pole piece, and prepare for the transfer, thereby improving the transfer quality.

[0077] Secondly, the pre-heating assembly 110 is arranged to heat the isolation film, so that the temperature of the solid-state electrolyte is increased, the viscosity of the solid-state electrolyte is reduced, and the flowability of the solid-state electrolyte is increased, so that the solid-state electrolyte is easily separated from the isolation film, and thus the solid-state electrolyte is easily transferred to the pole piece.

[0078] At the same time, if there is pressure, the solid-state electrolyte is easily flowed and spread along the pole piece, so that the solid-state electrolyte is easily and uniformly distributed on the pole piece.

[0079] Moreover, the pre-heating assembly 110 is arranged to heat the pole piece, so that the temperature of the pole piece is increased, the pole piece has high activity, the ability of the pole piece to connect the solid-state electrolyte is improved, and the solid-state electrolyte is more easily transferred from the isolation film to the pole piece.

[0080] Furthermore, the pre-pressing assembly 100 and the pre-heating assembly 110 are arranged to decompose the process of transferring the solid-state electrolyte to the pole piece, so that the process of transferring the solid-state electrolyte to the pole piece is not concentrated in the laminating assembly 120, and thus the solid-state electrolyte and the pole piece have sufficient time and suitable temperature to contact and connect, thereby improving the transfer quality.

[0081] In addition, the pre-pressing assembly 100 and the pre-heating assembly 110 are arranged to decompose the process of transferring the solid-state electrolyte to the pole piece, so that the process of transferring the solid-state electrolyte to the pole piece is not concentrated in the laminating assembly 120, and thus the solid-state electrolyte and the pole piece stay in the laminating assembly 120 for a short time, which improves the forming speed of the solid-state electrolyte on the pole piece and improves the production efficiency.

[0082] That is, the laminating assembly 120 does not need to increase the diameter of the roller and reduce the speed of the roller to prolong the time of the solid-state electrolyte and the pole piece extrusion contact, the time of the solid-state electrolyte and the pole piece extrusion contact is equal to the arc length of the outer circumference of the roller divided by the linear speed of the roller, the arc length of the outer circumference of the roller is positively correlated with the diameter of the roller, thus, the roller of the laminating assembly 120 of the utility model can adopt a smaller diameter, which is beneficial to miniaturization of the laminating assembly 120, at the same time, the roller of the laminating assembly 120 of the utility model can also adopt a higher linear speed, that is, the forming speed is improved.

[0083] In addition, the laminating assembly 120 is arranged in the embodiment, so that the solid-state electrolyte and the pole piece are extruded on the basis of pre-extrusion and pre-heating of the solid-state electrolyte and the pole piece, the solid-state electrolyte is fully flowed and unfolded, is uniformly distributed on the pole piece, and high-quality transfer printing is completed, which meets the requirements of solid-state battery production and manufacturing.

[0084] At the same time, before the laminating assembly 120 performs transfer printing, the solid-state electrolyte has been heated and initially contacted with the pole piece, the required pressure and heat for transfer printing are reduced, the requirements of the laminating assembly 120 are reduced, and the transfer printing of the electrolyte is facilitated by using a smaller diameter laminating roller, and the roller pressure precision is improved.

[0085] Since the solid-state electrolyte laminating roller pressing device is adopted in the solid-state battery production line of the embodiment, compared with the spraying forming method, the solid-state electrolyte does not need to pass through the coating gap of the spraying assembly, and thus the problem of blockage does not occur.

[0086] Therefore, by applying the solid-state electrolyte laminating roller pressing device, on the one hand, the defects generated by the spraying method are eliminated, and on the other hand, the forming efficiency and forming quality of the solid-state electrolyte connected pole piece are improved, which is helpful to improve the production efficiency and quality of the solid-state battery.

[0087] In some specific embodiments of the utility model, the solid-state electrolyte laminating roller pressing device can be arranged on the discharge side of the dry coating device, and the pole piece is transferred after dry coating in the solid-state electrolyte laminating roller pressing device.

[0088] It is easy to understand that, by arranging the solid-state electrolyte laminating roller pressing device on the discharge side of the dry coating device, the pole piece coated by the dry coating method can be directly transferred, the online inventory is reduced, and the manufacturing cost is reduced.

[0089] At the same time, the surface roughness of the pole piece coated by the dry powder coating method is suitable, the ability to connect the solid-state electrolyte can be improved, the transfer printing quality is improved, and then a high-quality electrode is produced.

[0090] In some specific embodiments of the utility model, the pre-pressing assembly 100, the pre-heating assembly 110 and the laminating assembly 120 can be arranged from top to bottom to free up the floor space, facilitate the arrangement of the isolating film unwinding assembly 170 and the isolating film winding assembly 180 of the isolating film, make the solid-state electrolyte laminating and rolling device compact in structure, and be arranged on a wall for easy disassembly and maintenance.

[0091] In some specific embodiments of the utility model, the number of isolating films can be two, and the pole piece can be located between the two isolating films, one isolating film transfers the solid-state electrolyte to one side of the pole piece, and the other isolating film transfers the solid-state electrolyte to the other side of the pole piece.

[0092] It is easy to understand that the two isolating films are arranged in the embodiment, so that the solid-state electrolyte is transferred to both sides of the pole piece, and more solid-state electrolyte is left on the pole piece, which helps to improve the capacity of the solid-state battery.

[0093] If only one side of the pole piece is transferred with the solid-state electrolyte, when the pole piece is wound, the side of the pole piece not transferred with the solid-state electrolyte will contact the solid-state electrolyte on the other side of the pole piece, but the two are not fully connected, which affects the quality of the electrode.

[0094] When the two sides of the pole piece are transferred with the solid-state electrolyte, whether the pole piece is wound or not, the two sides of the pole piece are well connected with the solid-state electrolyte, which is beneficial to ensure the quality of the solid-state battery.

[0095] When the pole piece is wound, the solid-state electrolyte on one side of the pole piece contacts and extrudes the solid-state electrolyte on the other side of the pole piece, and a thick layer of solid-state electrolyte is formed, which is not easy to delaminate, and does not affect the quality of the battery,

[0096] In some specific embodiments of the utility model, the pre-pressing assembly 100 can include a pair of pre-pressing rollers 130, and the pair of pre-pressing rollers 130 can press and roll the isolating film and the pole piece.

[0097] It is easy to understand that the pre-pressing rollers 130 are arranged in the embodiment, so that the isolating film and the pole piece can be close to and contact each other through the extrusion of the two pre-pressing rollers 130, so that the solid-state electrolyte connects the pole piece, and at the same time, the movement of the isolating film and the pole piece is not affected, so that the transfer continues, and the production downtime is reduced.

[0098] In some specific embodiments of the utility model, can make pre -press assembly 100 including the mounting seat of positioning pre -press roller 130, the number of mounting seat is two, a mounting seat installs a pre -press roller 130, wherein, mounting seat has installation opening, installation opening is located in the side of two mounting seat close, and, installation opening covers with installation cover, installation cover is connected mounting seat through bolt, thus, the space between installation opening and installation cover positions pre -press roller 130, without affecting the rotation of pre -press roller 130, and the mutual extrusion of two pre -press rollers 130, corresponding reaction force makes pre -press roller 130 keep in installation opening, less act on installation cover, thus, installation cover is not easy to loosen.

[0099] In some specific embodiments of the utility model, can make mounting seat be connected with screw rod and screw sleeve, screw sleeve is fixed on mounting seat, and screw rod is rotatably installed, thus, can make screw sleeve move by rotating screw rod, and then, drive mounting seat and pre -press roller 130 to move, change the gap between two pre -press rollers 130, to adjust the mutual extrusion of isolation film and pole piece, satisfy production needs.

[0100] In some specific embodiments of the utility model, can make pre -heat assembly 110 include a pair of infrared heater 140, a pair of infrared heater 140 is used for heating isolation film and pole piece, and the space between a pair of infrared heater 140 allows isolation film and pole piece to pass through.

[0101] It is easy to understand that, the present embodiment can heat solid-state electrolyte and pole piece by setting a pair of infrared heater 140, improve the activity of solid-state electrolyte and pole piece, facilitate solid-state electrolyte and pole piece to be connected in one body, improve the transfer printing quality.

[0102] Meanwhile, infrared heater 140 is non-contact heating, can also heat the inside of the material, especially, facilitate heating the junction of solid-state electrolyte and pole piece, so that solid-state electrolyte is connected with pole piece.

[0103] In some specific embodiments of the utility model, can make pre -heat assembly 110 have a fence to form a heating channel, the wall of heating channel is arranged with infrared heater 140, and the heating channel allows pole piece and isolation film to pass through, can make heat concentration, improve the heating efficiency, at the same time, reduce heat loss, reduce energy consumption.

[0104] In some specific embodiments of the utility model, can make covering assembly 120 include a pair of covering rollers 150, a pair of covering rollers 150 clampingly roll isolation film and pole piece, to make solid-state electrolyte on isolation film transfer to pole piece.

[0105] It is easy to understand that the embodiment is convenient for extruding the separator film and the pole piece by arranging the laminating roller 150, so that the solid electrolyte which has contacted the pole piece is closely attached to the pole piece under suitable temperature conditions, and the solid electrolyte is strengthened.

[0106] In some specific embodiments of the utility model, the laminating assembly 120 can be arranged with the hydraulic cylinder 160 which drives the laminating roller 150 to relatively approach or move away.

[0107] It is easy to understand that the embodiment is convenient for extruding the separator film and the pole piece by arranging the laminating roller 150, so that the solid electrolyte which has contacted the pole piece is closely attached to the pole piece under suitable temperature conditions, and the solid electrolyte is strengthened.

[0108] Meanwhile, the adjustable range of the hydraulic pressure is large, and the pressure required for connecting the solid electrolyte to the pole piece can be met.

[0109] In some specific embodiments of the utility model, the solid electrolyte supply mechanism can be arranged with the separator film unwinding assembly 170 and the separator film winding assembly 180, the separator film unwinding assembly 170 is used for unwinding the raw material roll, the raw material roll is in the roll state of the separator film with the solid electrolyte, and the separator film winding assembly 180 is used for winding the waste material roll, the waste material roll is in the roll state of the separator film with the solid electrolyte which has been transferred or removed.

[0110] It is easy to understand that the embodiment is convenient for collecting the separator film waste, and the solid electrolyte laminating roller pressing device is miniaturized and occupies a small space.

[0111] In some specific embodiments of the utility model, the two solid electrolyte supply mechanisms corresponding to the two separator films can be arranged on the left and right sides of the pre-pressing assembly 100, the pre-heating assembly 110 and the laminating assembly 120, so that the space is reasonably utilized, and the structure is more compact.

[0112] In some specific embodiments of the utility model, the separator film unwinding assembly 170 and the separator film winding assembly 180 can be arranged with the auxiliary supporting arm, the auxiliary supporting arm has the positioning opening of the material shaft where the roll is arranged, the rotation of the material shaft is limited, and when the auxiliary supporting arm rotates and moves away from the material shaft, the material shaft is convenient to replace.

[0113] In some specific embodiments of the utility model, the material shaft can be disassembled along the axial direction of the material shaft, instead of the installation mode of being disassembled along the radial direction of the material shaft, so that the electrolyte transfer printing mechanism occupies a smaller space and is convenient to arrange.

[0114] In some specific embodiments of the utility model, can make isolation film unwinding assembly 170 have material receiving platform, tension detector and electric eye, material receiving platform is convenient to connect two isolation films front and back, avoid the distribution of solid electrolyte on the pole piece appears interrupt and discontinuous, and tension detector can ensure that isolation film normal unwinding, reasonable control isolation film place unwinding, and electric eye can detect the quality of solid electrolyte on the isolation film and the presence or absence of isolation film, avoid the production of defective products or the situation of not covering solid electrolyte on the pole piece.

[0115] In some specific embodiments of the utility model, isolation film winding assembly 180 can have tension detector and electric eye to monitor the winding process of isolation film and avoid waste accumulation affecting device work.

[0116] In some specific embodiments of the utility model, isolation film winding assembly 180 can include a limiting guide roller located in the tangent direction of the discharge side of the laminating roller 150, which is beneficial to prolong the contact time of the isolation film and the pole piece, so that the solid electrolyte is more firmly formed on the pole piece.

[0117] Moreover, the starting point of separation of solid electrolyte and isolation film is from the limiting guide roller, which does not affect the laminating work of the laminating roller 150.

[0118] In some specific embodiments of the utility model, the pole piece winding device can include a pole piece winding assembly 190 and a defect detector 200 located on the incoming material side of the pole piece winding assembly 190, which is used to detect the surface quality of the solid electrolyte on the pole piece.

[0119] It is easy to understand that the pole piece winding assembly 190 can be set up in this embodiment to wind the pole piece produced by transferring the solid electrolyte, which is convenient to store and reduces the floor space.

[0120] At the same time, the utility model also can detect the surface quality of the solid electrolyte by setting the defect detector 200 to analyze the separation of the solid electrolyte and the isolation film, which can be detected early when there is more solid electrolyte on the isolation film, so as to adjust.

[0121] In some specific embodiments of the utility model, the defect detector 200 can be an image detection and analysis device, which can identify the surface quality of the electrolyte through image analysis, which is accurate and efficient and does not affect the winding of the pole piece.

[0122] In some specific embodiments of the utility model, the number of defect detectors 200 can be two to detect the two sides of the pole piece.

[0123] In the description of the specification, the description of the terms "one embodiment, some embodiments, illustrative embodiments, examples, specific examples, or some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the utility model. In the description, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner without departing from the purpose of the utility model.

[0124] The terms "first, second, third, fourth" and the like (if any) in the description of the specification and claims and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments described herein can be implemented in an order other than that illustrated or described herein.

[0125] It should also be noted that in the description of the specification, the relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or sequence between the entities or operations.

[0126] In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not necessarily limit to those steps or units clearly listed, but can also include other steps or units not clearly listed or inherent to the process, method, product or device.

[0127] Moreover, the terms "include", "contain" or any other variation thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitation, the element defined by the statement "including a" does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0128] The embodiments of the utility model are described in detail above in combination with the drawings, but the utility model is not limited to the above-mentioned embodiments, and within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the purpose of the utility model.

Claims

1. A dry electrode roll pressing and solid electrolyte lamination integrated machine, the blank of the dry electrode is an electrode sheet, characterized in that, The all-in-one machine comprises an electrode tab thinning roller pressing device (210) and a solid-state electrolyte laminating roller pressing device arranged in sequence along the electrode tab conveying path; The electrode tab thinning roller pressing device (210) comprises a pair of thinning rollers that clamp and press the electrode tab; The solid-state electrolyte laminating roller pressing device comprises a solid-state electrolyte supply mechanism for providing a separator film with solid-state electrolyte and a laminating roller pressing mechanism for transferring the solid-state electrolyte on the separator film to the electrode tab.

2. The dry electrode roll pressing and solid-state electrolyte lamination all-in-one machine according to claim 1, characterized in that, The electrode tab thinning roller pressing device (210) further comprises an electrode tab tensioning mechanism (220) located on the discharge side of the thinning rollers and on the feed side of the solid-state electrolyte laminating roller pressing device.

3. The dry electrode roll pressing and solid-state electrolyte lamination all-in-one machine according to claim 2, characterized in that, The electrode tab thinning roller pressing device (210) further comprises a thickness detection mechanism (230) located between the thinning rollers and the electrode tab tensioning mechanism (220).

4. The dry electrode roll pressing and solid-state electrolyte lamination all-in-one machine according to claim 1, characterized in that, The solid-state electrolyte supply mechanism comprises a separator film unwinding assembly (170) and a separator film winding assembly (180).

5. The dry electrode roll pressing and solid-state electrolyte lamination all-in-one machine according to claim 1, characterized in that, The number of separator films is two, and the electrode tab can be located between the two separator films, one separator film transfers the solid-state electrolyte to one side of the electrode tab, and the other separator film transfers the solid-state electrolyte to the other side of the electrode tab, and the number of solid-state electrolyte supply mechanisms corresponds to two.

6. The dry electrode roll pressing and solid-state electrolyte lamination all-in-one machine according to claim 1, characterized in that, The laminating roller pressing mechanism comprises a pre-pressing assembly (100), a pre-heating assembly (110), and a laminating assembly (120) arranged in sequence along the electrode tab conveying path, the pre-pressing assembly (100) is used to change the separator film and the electrode tab from a separated state to a contacted state, the pre-heating assembly (110) is used to heat the contacted separator film and electrode tab, the laminating assembly (120) is used to press the heated separator film and electrode tab to transfer the solid-state electrolyte on the separator film to the electrode tab, and the solid-state electrolyte can be separated from the separator film.

7. The dry electrode roll pressing and solid-state electrolyte lamination all-in-one machine according to claim 6, characterized in that, The pre-pressing assembly (100) comprises a pair of pre-pressing rollers (130) that clamp and press the separator film and the electrode tab, and / or the pre-heating assembly (110) comprises a pair of infrared heaters (140) for heating the separator film and the electrode tab, and the space between the pair of infrared heaters (140) allows the separator film and the electrode tab to pass through. 8.The dry electrode roll pressing and solid-state electrolyte lamination all-in-one machine according to claim 6, characterized in that, The laminating assembly (120) comprises a pair of laminating rollers (150), a hydraulic cylinder (160) that drives the laminating rollers (150) to move closer or farther apart, and a pair of laminating rollers (150) that clamp and press the separator film and the electrode tab to transfer the solid-state electrolyte on the separator film to the electrode tab. 9.The dry electrode roll pressing and solid-state electrolyte lamination all-in-one machine according to claim 6, characterized in that, The all-in-one machine comprises a pole piece winding device for winding the pole piece on which the solid-state electrolyte has been transferred into a roll state, the pole piece winding device comprises a pole piece winding assembly (190), a defect detector (200) located on the incoming material side of the pole piece winding assembly (190), the defect detector (200) is used to detect the surface quality of the solid-state electrolyte on the pole piece.

10. Solid-state battery production line, characterized by, The dry electrode rolling and solid-state electrolyte laminating all-in-one machine comprises the dry electrode rolling and solid-state electrolyte laminating all-in-one machine according to any one of claims 1 to 9.

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