Dry electrode pressing device, dry coating machine and solid-state battery production line

Abstract

The utility model discloses a dry electrode pressing device, a dry coating machine and a solid-state battery production line, and relates to the technical field of battery manufacturing. The dry electrode pressing device comprises a first pressing roller assembly; the second pressing roller assembly and the first pressing roller assembly are oppositely arranged in the first direction and jointly form a first rolling channel, and an opening in the upper end of the first rolling channel is a feeding opening; the third pressing roller assembly is located below the second pressing roller assembly, the third pressing roller assembly and the second pressing roller assembly are oppositely arranged and jointly form a second rolling channel, and the second rolling channel communicates with the first rolling channel so that the electrode film can pass through the second rolling channel; the execution end of the first height adjusting assembly is connected with the third pressing roller assembly, the first height adjusting assembly is configured to drive the third pressing roller assembly to move in the vertical direction so as to adjust the vertical size of the second rolling channel, and the first direction is perpendicular to the vertical direction. According to the utility model, the calendaring precision of the electrode film can be improved, and the occupied space and the cost of equipment in the horizontal direction are saved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery manufacturing, in particular to a dry electrode pressing device, a dry coating machine and a solid-state battery production line. Background Art

[0002] The electrode is the core part of the battery. The production process of the electrode is usually divided into a solvent wet coating process or a dry coating forming process. Among them, in the dry coating forming process, the raw materials are mixed in a dry powder state to form a powdery mixture. Then, the powdery mixture is roll-pressed by a rolling mill into an electrode film with a certain thickness. Next, the electrode film is compounded with the current collector to form the electrode of the battery. In the structure of the solid-state battery, the positive electrode sheet is usually made by dry coating. At present, the rolling equipment suitable for dry electrodes makes the electrode film by a one-step rolling method. However, the existing rolling equipment has low rolling accuracy for the electrode film and still needs to be improved. Summary of the Utility Model

[0003] The utility model aims to at least solve one of the technical problems existing in the prior art. For this reason, the utility model provides a dry electrode pressing device, a dry coating machine and a solid-state battery production line, which can improve the rolling accuracy of the electrode film, save the occupied space of the equipment in the horizontal direction and reduce the cost.

[0004] The first aspect embodiment of the utility model provides a dry electrode pressing device, which includes:

[0005] A first roller assembly;

[0006] A second roller assembly, which is arranged opposite to the first roller assembly along a first direction and jointly forms a first rolling channel. The upper end opening of the first rolling channel is a feed port;

[0007] A third roller assembly, which is located below the second roller assembly. The third roller assembly and the second roller assembly are arranged opposite to each other and jointly form a second rolling channel. The second rolling channel is communicated with the first rolling channel to supply the electrode film to pass through;

[0008] A first height adjustment assembly, whose execution end is connected with the third roller assembly. The first height adjustment assembly is configured to drive the third roller assembly to move in the up and down direction to adjust the up and down size of the second rolling channel. The first direction is perpendicular to the up and down direction.

[0009] According to the dry electrode pressing-down device of the first aspect embodiment of the present utility model, it has at least the following beneficial effects: The material of the electrode film enters the first rolling channel defined by the first roller assembly and the second roller assembly from the feeding port downward, realizing the preliminary rolling of the electrode film; then, the electrode film enters the second rolling channel defined by the second roller assembly and the third roller assembly, realizing the secondary rolling of the electrode film; moreover, during the secondary rolling operation, the vertical dimension of the second rolling channel can be precisely adjusted through the first height adjustment assembly, thereby precisely adjusting the thickness of the electrode film and improving the rolling accuracy of the electrode film. At the same time, the first roller assembly, the second roller assembly, and the third roller assembly are arranged in an L shape, which can save the occupied space of the dry electrode pressing-down device in the horizontal direction, and moreover, make the structure of the dry electrode pressing-down device more compact and save costs.

[0010] In some embodiments of the present utility model, the dry electrode pressing-down device further includes a horizontal adjustment assembly, the execution end of the horizontal adjustment assembly is connected to the first roller assembly, and the horizontal adjustment assembly is configured to be able to drive the first roller assembly to move along a first direction to adjust the dimension of the first rolling channel in the first direction.

[0011] In some embodiments of the present utility model, the first roller assembly includes a first roller member and a second roller member, the second roller member, the first roller member, and the second roller assembly are arranged in sequence along the first direction, the roller surface of the second roller member is in contact with the roller surface of the first roller member, the roller surfaces of the first roller member and the second roller assembly jointly define the first rolling channel, and the outer diameter of the first roller member is smaller than the outer diameters of the second roller member and the second roller assembly.

[0012] In some embodiments of the present utility model, the dry electrode pressing-down device further includes a roller surface treatment assembly, the roller surface treatment assembly includes an oil application component and / or a scraping component, the oil application component is configured to be able to apply oil to the roller surface, and the scraping component is configured to be able to scrape off the waste on the roller surface; there are at least three roller surface treatment assemblies, and they are respectively arranged corresponding to the first roller assembly, the second roller assembly, and the third roller assembly.

[0013] In some embodiments of the present utility model, the first height adjustment assembly includes a linear driving component, a first limiting component, and a second limiting component, the first limiting component is arranged on the third roller assembly, the second limiting component is arranged on the second roller assembly, at least one of the first limiting component and the second limiting component is configured to be able to adjust up and down, the execution end of the linear driving component is connected to the third roller assembly, and the linear driving component is configured to be able to drive the third roller assembly to move along the up and down direction so that the first limiting component and the second limiting component are in contact.

[0014] In some embodiments of the present utility model, the first limiting component includes a first limiting member and a position adjusting member. The position adjusting member is arranged on the third roller pressing assembly. The execution end of the position adjusting member is connected to the first limiting member. The position adjusting member is configured to be able to adjust the position of the first limiting member in the horizontal direction. A first inclined surface is provided at the upper end of the first limiting member. The second limiting component includes a second limiting member. A second inclined surface is provided at the lower end of the second limiting member. The second inclined surface and the first inclined surface are in fitting contact.

[0015] The second aspect embodiment of the present utility model provides a dry coating machine, which includes the dry electrode pressing device as described in the first aspect embodiment.

[0016] The dry coating machine according to the second aspect embodiment of the present utility model has at least the following beneficial effects: By adopting the above dry electrode pressing device in the structure of the dry coating machine, the calendering accuracy of the electrode film can be improved, thereby improving the manufacturing quality of the electrode sheet.

[0017] In some embodiments of the present utility model, the dry coating machine further includes a fourth roller pressing assembly and a second height adjusting assembly. The fourth roller pressing assembly is located below the third roller pressing assembly. The fourth roller pressing assembly and the third roller pressing assembly are arranged oppositely and jointly form a third roller pressing channel for the electrode film and the foil to pass through. The execution end of the second height adjusting assembly is connected to the fourth roller pressing assembly. The second height adjusting assembly is configured to be able to drive the fourth roller pressing assembly to move in the up and down direction to adjust the up and down size of the third roller pressing channel.

[0018] In some embodiments of the present utility model, the dry coating machine further includes a fifth roller pressing assembly, a sixth roller pressing assembly and a third height adjusting assembly. The third roller pressing assembly, the fifth roller pressing assembly and the sixth roller pressing assembly are arranged in sequence in the up and down direction. The third roller pressing assembly and the fifth roller pressing assembly jointly form a fourth roller pressing channel for the electrode film to pass through. The fifth roller pressing assembly and the sixth roller pressing assembly jointly form a fifth roller pressing channel for the electrode film and the foil to pass through. The execution end of the third height adjusting assembly is connected to the sixth roller pressing assembly. The third height adjusting assembly is configured to be able to drive the sixth roller pressing assembly to move in the up and down direction to adjust the up and down size of the fifth roller pressing channel.

[0019] The third aspect embodiment of the present utility model provides a solid-state battery production line, which includes the dry coating machine as described in the second aspect embodiment.

[0020] The solid-state battery production line according to the third aspect embodiment of the present utility model has at least the following beneficial effects: By adopting the above-mentioned dry coating machine in the solid-state battery production line, the coating effect can be improved, and thus the solid-state battery has higher manufacturing quality.

[0021] Other features and advantages of the present utility model will be described in the subsequent description, and partly become obvious from the description, or be understood by implementing the present utility model. The objectives and other advantages of the present utility model can be achieved and obtained through the structures specifically pointed out in the description, claims, and drawings. Description of the Drawings

[0022] Figure 1 is a schematic structural diagram of a dry electrode pressing-down device provided according to the first aspect embodiment of the present utility model;

[0023] Figure 2 is a schematic structural diagram of a dry coating machine provided according to the second aspect embodiment of the present utility model;

[0024] Figure 3 is a schematic structural diagram of a dry coating machine provided according to another embodiment of the second aspect of the present utility model;

[0025] Figure 4 is a schematic structural diagram of a first limiting member and a second limiting member in the dry electrode pressing-down device provided according to the first aspect embodiment of the present utility model.

[0026] Reference numerals: 100, dry electrode pressing-down device; 110, first roller assembly; 111, first roller member; 112, second roller member; 113, horizontal adjustment assembly; 120, second roller assembly; 130, third roller assembly; 140, linear driving member; 150, first limiting member; 151, position adjustment member; 152, first limiting member; 153, support; 160, second limiting member; 170, roller surface treatment assembly; 180, feed hopper; 190, machine base; 210, electrode film; 220, foil; 310, unwind roller; 320, fourth roller assembly; 330, second height adjustment assembly; 340, fifth roller assembly; 350, sixth roller assembly; 360, third height adjustment assembly; 370, heating assembly; 380, seventh roller assembly. Detailed Embodiments

[0027] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0028] In the description of the present utility model, it should be understood that the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0029] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "connected" and "connected to" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0030] A solid-state lithium metal battery is a new type of battery that uses a solid electrolyte to replace the separator and liquid electrolyte used in traditional lithium-ion batteries, enabling the graphite or silicon anode in traditional lithium-ion batteries to be replaced by a lithium metal anode. The energy density of the lithium metal anode is higher than that of the traditional anode, allowing the battery to store more energy in the same volume and improving the battery's endurance.

[0031] The electrode belongs to the core part of the battery. The production process of the electrode is usually divided into a solvent wet coating process or a dry coating forming process. Among them, the positive electrode plate is processed by coating a positive electrode film on a positive current collector (such as aluminum foil, etc.), and the negative electrode plate is processed by coating a negative electrode film on a negative current collector (such as copper foil, etc.).

[0032] The dry electrode film is prepared by stirring, dispersing, and fibrillating the active material, conductive agent, and binder, and then through a rolling process. Since no solvent is used in the dry coating forming process and the binder exists in a fibrous state, the contact between the active materials and between the active material and the conductive agent is closer. Therefore, the dry electrode film has the advantages of high electrode density, good conductivity, high capacitance, and long cycle life.

[0033] In the dry coating forming process, the raw materials of the electrode film are mixed in a dry powder state to form a powdery mixture. Then, the powdery mixture is rolled into an electrode film with a certain thickness by a rolling mill. Next, the electrode film is compounded with the current collector to form the electrode of the battery. In the structure of the solid-state battery, the positive electrode plate is usually made by dry coating.

[0034] Currently, the rolling equipment suitable for dry electrodes basically completes the preparation work of the electrode film through a one-step rolling method. However, the rolling accuracy of the existing rolling equipment for the electrode film is low and still needs to be improved.

[0035] Based on the above problems, the present utility model provides a dry electrode pressing device, a dry coating machine and a solid-state battery production line, which can improve the rolling accuracy of the electrode film, is beneficial to improving the manufacturing quality of the solid-state battery, and makes the structure of the dry electrode pressing device more compact, which can save the occupied space of the dry electrode pressing device in the horizontal direction and reduce the manufacturing cost of the equipment.

[0036] The following refers to Figures 1 to 4 Describe the dry electrode pressing device, dry coating machine and solid-state battery production line provided according to the embodiments of the present utility model.

[0037] As Figure 1 and Figure 4 shown, the dry electrode pressing device 100 according to the first aspect embodiment of the present utility model can be used for the rolling work of the electrode film 210.

[0038] The dry electrode pressing device 100 has a first direction, a second direction and an up-down direction. The first direction is perpendicular to the up-down direction and the second direction respectively, and the second direction is perpendicular to the up-down direction. In this embodiment, it is assumed that the first direction is the left-right direction and the second direction is the front-back direction.

[0039] The structure of the dry electrode pressing device 100 includes a first roller pressing assembly 110, a second roller pressing assembly 120, a third roller pressing assembly 130 and a first height adjusting assembly.

[0040] The first roller pressing assembly 110 and the second roller pressing assembly 120 are arranged at intervals in sequence along the left-right direction and are arranged oppositely. There is a certain left-right distance between the first roller pressing assembly 110 and the second roller pressing assembly 120, so that the first roller pressing assembly 110 and the second roller pressing assembly 120 jointly form a first rolling channel. The first rolling channel penetrates along the up-down direction, so that the first rolling channel has an upper opening and a lower opening. Among them, the upper opening of the first rolling channel is set as the feeding port, so that the material of the electrode film 210 can enter the first rolling channel from top to bottom through the feeding port to complete the first rolling work of the electrode film 210. The lower opening of the first rolling channel is set as the discharging port, so that the rolled electrode film 210 can leave the first rolling channel.

[0041] In this embodiment, the first pressing roller assembly 110 is located on the left side of the second pressing roller assembly 120. Both the first pressing roller assembly 110 and the second pressing roller assembly 120 can rotate around their own central axes, and the central axes of the first pressing roller assembly 110 and the second pressing roller assembly 120 both extend in the front-rear direction. The rotation direction of the first pressing roller assembly 110 is opposite to that of the second pressing roller assembly 120. The first pressing roller assembly 110 rotates in the clockwise direction, and the second pressing roller assembly 120 rotates in the counterclockwise direction. Therefore, the material of the electrode film 210 at the feed port can be roll-pressed into an electrode film 210 with a certain thickness.

[0042] It can be understood that the structures of the first pressing roller assembly 110 and the second pressing roller assembly 120 can be the same, and both include a mounting seat, a pressing roller, and a rotation driving member. The opposite ends of the pressing roller are arranged on the mounting seat through bearings, and the rotation driving member is arranged on the mounting seat. The rotation driving member is a motor, and the motor is connected to one end of the pressing roller through a transmission structure such as a coupling to drive the pressing roller to rotate. The diameters of the pressing rollers of the first pressing roller assembly 110 and the second pressing roller assembly 120 can be the same or different.

[0043] The second pressing roller assembly 120 and the third pressing roller assembly 130 are sequentially arranged at intervals in the up-down direction. The third pressing roller assembly 130 is located below the second pressing roller assembly 120, and the third pressing roller assembly 130 and the second pressing roller assembly 120 are arranged opposite to each other in the up-down direction. Therefore, there is a certain up-down distance between the third pressing roller assembly 130 and the second pressing roller assembly 120, so that the second pressing roller assembly 120 and the third pressing roller assembly 130 jointly form a second roller pressing channel. The second roller pressing channel penetrates in the left-right direction, so that the second roller pressing channel has a left end opening and a right end opening. Among them, the left end opening of the second roller pressing channel is set as the inlet, and the right end opening of the second roller pressing channel is set as the outlet.

[0044] The second roller pressing channel is communicated with the first roller pressing channel to allow the electrode film 210 to pass through. Therefore, the electrode film 210 coming out of the first roller pressing channel will enter the second roller pressing channel through the inlet to complete the secondary rolling work of the electrode film 210. After the electrode film 210 is roll-pressed again, the electrode film 210 will leave the second roller pressing channel from the outlet.

[0045] In this embodiment, the third roller assembly 130 can rotate around its own central axis, and the central axes of both the third roller assembly 130 and the second roller assembly 120 extend in the front-rear direction. The rotation direction of the second roller assembly 120 is opposite to that of the third roller assembly 130. The second roller assembly 120 rotates counterclockwise, and the third roller assembly 130 rotates clockwise. Therefore, the preliminarily roller-pressed electrode film 210 can be fed into the second roller pressing channel. The electrode film 210 after secondary roller pressing can be laminated with a current collector (or called foil 220) to fabricate an electrode tab.

[0046] It can be understood that the structure of the third roller assembly 130 is the same as that of the second roller assembly 120. The roller diameter of the third roller assembly 130 is the same as that of the second roller assembly 120. The electrode film 210 located between the first roller pressing channel and the second roller pressing channel can be in contact with the roller surface of the roller of the second roller assembly 120, or can have a gap with the roller surface of the roller of the second roller assembly 120.

[0047] The execution end of the first height adjustment assembly is connected to the third roller assembly 130. The first height adjustment assembly is configured to drive the third roller assembly 130 to move in the up-down direction, so as to adjust the up-down dimension of the second roller pressing channel.

[0048] It can be understood that the first height adjustment assembly can be a high-precision linear motion device such as a linear module or an electric cylinder, which can accurately adjust the up-down distance between the second roller assembly 120 and the third roller assembly 130, and realize accurate control of the thickness of the electrode film 210 passing between the second roller assembly 120 and the third roller assembly 130. If the first height adjustment assembly selects an electric cylinder, the moving rod of the electric cylinder is the execution end. The first roller assembly 110 and the second roller assembly 120 do not move in the up-down direction, and the third roller assembly 130 can move up or down under the driving action of the first height adjustment assembly. Of course, it is not excluded that the first height adjustment assembly adopts a manual structure, such as a hand-cranked ball screw slide.

[0049] In addition, the dry electrode pressing device 100 further includes a feed hopper 180 and a machine base 190. The feed hopper 180, the first roller pressing assembly 110, the second roller pressing assembly 120, the third roller pressing assembly 130, and the first height adjustment assembly are all mounted on the machine base 190. The bottom of the feed hopper 180 has a material discharge opening, which is located above the first roller pressing channel. The material discharge opening and the feed opening of the first roller pressing channel are arranged vertically opposite to each other. Therefore, the material of the electrode film 210 in the feed hopper 180 can fall from the material discharge opening into the first roller pressing channel. Both the first roller pressing assembly 110 and the second roller pressing assembly 120 can rotate on the machine base 190. The third roller pressing assembly 130 can be installed on the machine base 190 through a slide rail-slider pair, and the third roller pressing assembly 130 can move up and down relative to the machine base 190 under the action of the first height adjustment assembly.

[0050] In some embodiments, as Figure 1 shown, the structure of the dry electrode pressing device 100 further includes a horizontal adjustment assembly 113.

[0051] Among them, the execution end of the horizontal adjustment assembly 113 is connected to the first roller pressing assembly 110. The horizontal adjustment assembly 113 is configured to be able to drive the first roller pressing assembly 110 to move along the first direction, so as to adjust the size of the first roller pressing channel in the first direction. The horizontal adjustment assembly 113 is arranged on the machine base 190, and the first roller pressing assembly 110 can be installed on the machine base 190 through a slide rail-slider pair.

[0052] It can be understood that the horizontal adjustment assembly 113 can be a high-precision linear motion device such as a linear module or an electric cylinder, which can accurately adjust the left-right distance between the first roller pressing assembly 110 and the second roller pressing assembly 120, and realize accurate control of the thickness of the electrode film 210 passing between the first roller pressing assembly 110 and the second roller pressing assembly 120. If the horizontal adjustment assembly 113 is an electric cylinder, the movable rod of the electric cylinder is the execution end. Through the horizontal adjustment assembly 113, the thickness of the preliminarily calendered electrode film 210 is adjusted, and through the first height adjustment assembly, the thickness of the secondarily calendered electrode film 210 is adjusted to improve the calendering accuracy of the dry electrode pressing device 100 for the electrode film 210. Of course, the horizontal adjustment assembly 113 can also adopt a manual structure, such as a hand-cranked ball screw slide table.

[0053] In some embodiments, as Figure 1As shown in the figure, the structure of the first pressure roller assembly 110 includes a first pressure roller member 111 and a second pressure roller member 112. Among them, the second pressure roller member 112, the first pressure roller member 111, and the second pressure roller assembly 120 are arranged in sequence along the first direction. The first pressure roller member 111 is located between the second pressure roller member 112 and the second pressure roller assembly 120, and the roller surface of the second pressure roller member 112 is in rolling contact with the roller surface of the first pressure roller member 111. There is a certain left-right distance between the first pressure roller member 111 and the second pressure roller assembly 120, so that the roller surfaces of the first pressure roller member 111 and the second pressure roller assembly 120 jointly define a first roller pressing channel. The outer diameter of the first pressure roller member 111 is smaller than the outer diameter of the second pressure roller member 112, and moreover, the outer diameter of the first pressure roller member 111 is also smaller than the outer diameter of the second pressure roller assembly 120. The outer diameter of the second pressure roller member 112 can be the same as the outer diameter of the second pressure roller assembly 120.

[0054] The structures of the first pressure roller member 111 and the second pressure roller member 112 are the same as that of the second pressure roller assembly 120, and both include a mounting seat, a pressure roller, and a rotary driving member. The second pressure roller member 112 is located on the left side of the first pressure roller member 111, and the second pressure roller assembly 120 is located on the right side of the first pressure roller member 111.

[0055] It can be understood that in the structure of the first pressure roller assembly 110, by adopting the two structures of the first pressure roller member 111 and the second pressure roller member 112, the second pressure roller member 112 with a larger diameter can exert a certain restrictive effect on the first pressure roller member 111 with a smaller diameter, so that the first pressure roller member 111 can cooperate with the second pressure roller assembly 120 to work, perform a good preliminary roller pressing treatment on the electrode film 210, and prevent the first pressure roller member 111 from being easily deformed during the preliminary roller pressing process of the electrode film 210. The rotation speed of the first pressure roller member 111 can be greater than the rotation speed of the second pressure roller member 112.

[0056] Furthermore, in the case where the horizontal adjustment assembly 113 is provided, both the first pressure roller member 111 and the second pressure roller member 112 are connected to the execution end of the horizontal adjustment assembly 113, so that the first pressure roller member 111 and the second pressure roller member 112 can move along the left-right direction under the driving action of the horizontal adjustment assembly 113, thereby adjusting the left-right dimension of the first roller pressing channel and ensuring that the first pressure roller member 111 and the second pressure roller member 112 maintain a rolling contact state.

[0057] Of course, it is not excluded that in other embodiments, the structure of the first pressure roller assembly 110 only includes the first pressure roller member 111.

[0058] In some embodiments, such as Figure 1As shown, the dry electrode pressing device 100 further includes a roller surface treatment assembly 170. Among them, the roller surface treatment assembly 170 includes an oiling component and a scraping component. The oiling component is configured to apply oil to the roller surface, and the scraping component is configured to scrape off the waste on the roller surface. Therefore, the roller surface treatment assembly 170 can perform oiling and waste removal treatments on the roller surface.

[0059] It can be understood that the scraping component includes a scraper, and the scraper is arranged close to the roller surface and can scrape off the waste on the roller surface. In some examples, the oiling component includes an oiling roller, and the oiling roller is in rolling contact with the roller surface to apply the oil liquid on the roller surface. In other examples, the oiling component includes a nozzle, and the nozzle can spray the oil liquid towards the roller surface.

[0060] There are at least three roller surface treatment assemblies 170, and they are respectively arranged corresponding to the first pressure roller assembly 110, the second pressure roller assembly 120, and the third pressure roller assembly 130 to perform roller surface treatment on the roller surfaces of the first pressure roller assembly 110, the second pressure roller assembly 120, and the third pressure roller assembly 130 respectively. All the roller surface treatment assemblies 170 are located outside the first roller pressing channel and the second roller pressing channel. For the first pressure roller assembly 110, the second pressure roller assembly 120, and the third pressure roller assembly 130, the roller surface treatment assembly 170 is arranged close to the roller surface.

[0061] In this embodiment, corresponding to the first pressure roller assembly 110, the second pressure roller assembly 120, and the third pressure roller assembly 130, there is one roller surface treatment assembly 170 each. When the first pressure roller assembly 110 includes a first pressure roller member 111 and a second pressure roller member 112, the roller surface treatment assembly 170 is arranged corresponding to the first pressure roller member 111. Of course, it is not excluded to arrange the roller surface treatment assembly 170 for the second pressure roller member 112.

[0062] For the first pressure roller assembly 110, the roller surface treatment assembly 170 is fixed to the first pressure roller assembly 110, and under the driving action of the horizontal adjustment assembly 113, the roller surface treatment assembly 170 and the first pressure roller assembly 110 move together in the left - right direction. For the third pressure roller assembly 130, the roller surface treatment assembly 170 is fixed to the third pressure roller assembly 130, and under the driving action of the first height adjustment assembly, the roller surface treatment assembly 170 and the third pressure roller assembly 130 move together in the up - down direction.

[0063] It can be understood that during the rolling operation of the electrode film 210, waste materials of the electrode film 210 may remain on the roller surfaces of the first roller assembly 110, the second roller assembly 120, and the third roller assembly 130. To avoid the problem that the waste materials adhered to the roller surfaces enter the first rolling channel or the second rolling channel again and affect the rolling effect of the electrode film 210, therefore, in this embodiment, a roller surface treatment assembly 170 is installed to first scrape the roller surface of the first roller assembly 110 by the roller surface treatment assembly 170 to remove the residual waste materials on the roller surface. Then, the roller surface treatment assembly 170 coats the roller surface with oil fluid to prevent the problem that due to the adhesion between the electrode film 210 and the roller surface of the first roller assembly 110, some powder materials in the electrode film 210 fall off, thereby reducing the rolling effect of the electrode film 210. Similarly, the treatment process of the roller surface treatment assembly 170 for the second roller assembly 120 and the third roller assembly 130 is as described above.

[0064] Of course, it is not excluded that in other embodiments, the roller surface treatment assembly 170 only includes an oil coating component or only includes a scraping component.

[0065] In some embodiments, as Figure 1 and Figure 4 shown, the structure of the first height adjustment assembly includes a linear drive component 140, a first limit component 150, and a second limit component 160.

[0066] Among them, the first limit component 150 is arranged on the third roller assembly 130 and can move up and down together with the third roller assembly 130. The second limit component 160 is arranged on the second roller assembly 120. The first limit component 150 is located below the second limit component 160. The first limit component 150 and the second limit component 160 are arranged relatively up and down. Moreover, at least one of the first limit component 150 and the second limit component 160 is configured to be adjustable up and down.

[0067] The execution end of the linear drive component 140 is connected to the third roller assembly 130. The linear drive component 140 is configured to be able to drive the third roller assembly 130 to move in the up and down direction so that the first limit component 150 and the second limit component 160 are in contact. Moreover, the driving force exerted by the linear drive component 140 on the third roller assembly 130 can just offset the gravity of the third roller assembly 130, so that the up and down position of the third roller assembly 130 remains unchanged. At this time, the first limit component 150 is in contact with the second limit component 160, restricting the third roller assembly 130 from moving up further.

[0068] In some embodiments, when the first limiting member 150 abuts against the second limiting member 160, the driving force applied by the linear driving member 140 to the third roller assembly 130 is greater than the gravity of the third roller assembly 130, so that the rolling pressure of the third roller assembly 130 on the electrode film 210 is increased to the set pressure requirement, thereby improving the rolling effect on the electrode film 210.

[0069] It can be understood that the first limiting member 150 and the third roller assembly 130 are movably connected to adjust the vertical position of the first limiting member 150 relative to the third roller assembly 130. The second limiting member 160 and the second roller assembly 120 are movably connected to adjust the vertical position of the second limiting member 160 relative to the second roller assembly 120. Specifically, the first limiting member 150 and the second limiting member 160 may include limiting blocks and are installed on the corresponding roller assemblies by bolts. Of course, in other embodiments, only the first limiting member 150 or the second limiting member 160 needs to be vertically adjustable.

[0070] The linear driving member 140 may be a linear driving device such as a cylinder, an oil cylinder or an electric cylinder. If the linear driving member 140 is an oil cylinder, the movable rod of the oil cylinder is the execution end. The linear driving member 140 does not have the function of accurately controlling the moving distance of the third roller assembly 130, that is, the linear driving member 140 cannot accurately control the vertical dimension of the second rolling channel. Therefore, the performance requirements of the linear driving member 140 can be reduced, and the cost of the linear driving member 140 can be reduced.

[0071] It can be understood that by adjusting the vertical position of at least one of the first limiting member 150 and the second limiting member 160, when the linear driving member 140 drives the third roller assembly 130 to move upward, when the first limiting member 150 abuts against the second limiting member 160 upward, the third roller assembly 130 stops moving upward, so that the vertical distance between the second roller assembly 120 and the third roller assembly 130 can be controlled. Therefore, in the second rolling operation of the electrode film 210, based on the cooperation of the first limiting member 150, the second limiting member 160 and the linear driving member 140, the accurate adjustment of the dry electrode thickness is achieved.

[0072] In this embodiment, as Figure 4As shown, the structure of the first limiting component 150 includes a first limiting member 152 and a position adjusting member 151. Among them, the position adjusting member 151 is installed on the third pressing roller assembly 130 through a support 153. The execution end of the position adjusting member 151 is fixedly connected to the first limiting member 152, and the position adjusting member 151 is configured to be able to adjust the position of the first limiting member 152 in the horizontal direction. The upper end of the first limiting member 152 is provided with a first inclined surface, and the second limiting component 160 includes a second limiting member. The lower end of the second limiting member is provided with a second inclined surface, and the second inclined surface and the first inclined surface are in fitting contact.

[0073] It can be understood that the position adjusting member 151 can be a linear driving device with a servo motor, such as a linear motor or a linear module. The position adjusting member 151 can accurately adjust the horizontal position of the first limiting member 152. In this embodiment, the position adjusting member 151 drives the first limiting member 152 to move in the left-right direction to adjust the left-right position of the first limiting member 152 relative to the second limiting member.

[0074] Both the first limiting member 152 and the second limiting member are metal blocks. The first inclined surface on the first limiting member 152 slopes upward from left to right, and the second inclined surface on the second limiting member slopes upward from left to right. The inclination angles of the first inclined surface and the second inclined surface are the same. Therefore, after the linear driving component 140 drives the third pressing roller assembly 130 to move upward in place, the first inclined surface and the second inclined surface are in fitting contact.

[0075] When the inclination angle of the first inclined surface and the displacement of the first limiting member 152 in the left-right direction are known, the up-down movement distances of the first limiting member 152 and the third pressing roller assembly 130 can be obtained according to trigonometric functions, so that the up-down distance between the third pressing roller assembly 130 and the second pressing roller assembly 120 can be accurately controlled. Therefore, the secondary rolling accuracy of the electrode film 210 can be improved. When the dry electrode pressing device 100 is electrically connected to the industrial computer, the industrial computer can reverse the horizontal distance that the position adjusting member 151 drives the first limiting member 152 to move according to the set up-down size of the second rolling channel.

[0076] Of course, it is not excluded that in other embodiments, both the first inclined surface and the second inclined surface are inclined downward from left to right.

[0077] When the first limiting member 150 adopts the above structure, the linear driving member 140 does not need to be set as a driving member that can accurately control the driving distance, avoiding an increase in manufacturing cost, and enabling the execution end of the linear driving member 140 to bear the weight of the third roller assembly 130 for a long time. Relative to the linear driving member 140, the position adjusting member 151 has high control precision, small volume, low cost, and high automation degree. The execution end of the position adjusting member 151 does not need to bear the weight of the third roller assembly 130 and can accurately adjust the horizontal position of the first limiting member 152.

[0078] During the use of the dry electrode pressing-down device 100 provided in the first aspect embodiment of the present utility model, the material of the electrode film 210 enters downward from the feeding port into the gap defined by the first roller assembly 110 and the second roller assembly 120, that is, the first roller pressing channel, to realize the preliminary rolling of the electrode film 210. Then, the preliminarily roller-pressed electrode film 210 leaves the first roller pressing channel and enters the gap defined by the second roller assembly 120 and the third roller assembly 130, that is, the second roller pressing channel, to realize the secondary rolling of the electrode film 210. Moreover, during the secondary rolling operation of the electrode film 210, the up-and-down dimension of the second roller pressing channel can be accurately adjusted through the first height adjusting assembly, so as to accurately adjust the thickness of the electrode film 210 and improve the rolling precision of the electrode film 210.

[0079] Moreover, the first roller assembly 110, the second roller assembly 120, and the third roller assembly 130 are arranged in an L shape. The second roller assembly 120 cooperates with the first roller assembly 110 and the third roller assembly 130 respectively to form the first roller pressing channel and the second roller pressing channel. There is no need to additionally provide another roller assembly for the third roller assembly 130 to form the second roller pressing channel. Therefore, the occupied space of the dry electrode pressing-down device 100 in the horizontal direction can be saved, and the structure of the dry electrode pressing-down device 100 can be made more compact, saving the manufacturing cost. At the same time, the problem that the space below the second roller assembly 120 and the third roller assembly 130 is too small, making it inconvenient to set other roller assemblies for rolling the electrode sheet and unable to accommodate the driving member with controllable adjustable spacing can be avoided.

[0080] As Figures 1 to 4 shown, the dry coating machine according to the second aspect embodiment of the present utility model includes the dry electrode pressing-down device 100 as in the first aspect embodiment.

[0081] The dry coating machine can perform a lamination process on the foil material 220 and the electrode film 210 manufactured by the dry electrode pressing-down device 100 to form an electrode sheet.

[0082] In a specific embodiment, as Figure 1 and Figure 2As shown, the structure of the dry coating machine not only includes a dry electrode pressing device 100, but also includes a fourth roller pressing assembly 320 and a second height adjusting assembly 330.

[0083] Among them, the fourth roller pressing assembly 320 is located below the third roller pressing assembly 130. The fourth roller pressing assembly 320 and the third roller pressing assembly 130 are arranged oppositely and jointly form a third roller pressing channel for the electrode film 210 and the foil 220 to pass through. The execution end of the second height adjusting assembly 330 is connected to the fourth roller pressing assembly 320. The second height adjusting assembly 330 is configured to drive the fourth roller pressing assembly 320 to move in the up and down direction to adjust the up and down size of the third roller pressing channel.

[0084] It can be understood that the dry electrode pressing device 100, the fourth roller pressing assembly 320 and the second height adjusting assembly 330 can jointly form a roller pressing mechanism of the dry coating machine to realize the hot pressing and laminating of the electrode film 210 and the foil 220. The fourth roller pressing assembly 320 has the same structure as the third roller pressing assembly 130. The third roller pressing assembly 130 and the fourth roller pressing assembly 320 rotate in opposite directions. The third roller pressing assembly 130 rotates clockwise and the fourth roller pressing assembly 320 rotates counterclockwise.

[0085] The third roller pressing channel penetrates in the left and right direction and has a left end opening and a right end opening. Among them, the left end opening of the third roller pressing channel is the roller pressing outlet, and the right end opening of the third roller pressing channel is the roller pressing inlet. The electrode film 210 coming out of the second roller pressing channel bypasses the third roller pressing assembly 130 and enters the third roller pressing channel together with the foil 220 from the roller pressing inlet, so that the electrode film 210 is laminated on the foil 220 to form an electrode plate.

[0086] The second height adjusting assembly 330 can have the same structure as the first height adjusting assembly. Of course, the second height adjusting assembly 330 can be a high-precision linear driving device, such as a linear module, a linear motor, etc. The second height adjusting assembly 330 can accurately control the up and down distance between the fourth roller pressing assembly 320 and the third roller pressing assembly 130, thereby controlling the thickness of the manufactured electrode plate.

[0087] In addition, the dry coating machine also includes a heating assembly 370 and an unwinding assembly. Among them, the unwinding assembly includes an unwinding roller 310. The foil material roll is arranged on the unwinding roller 310. By releasing the foil material roll, the foil 220 enters the third roller pressing channel together with the electrode film 210. The heating assembly 370 can include an infrared heater. The heating assembly 370 can heat at least one surface of the foil 220 so that the electrode film 210 is more easily laminated on the surface of the foil 220.

[0088] In another specific embodiment, such as Figure 1 andFigure 3 As shown, the structure of the dry coating machine includes a dry electrode pressing device 100 , a fifth pressing roller assembly 340 , a sixth pressing roller assembly 350 and a third height adjustment assembly 360 .

[0089] Among them, the third roller assembly 130, the fifth roller assembly 340 and the sixth roller assembly 350 are sequentially arranged in the up-down direction and are arranged oppositely, the third roller assembly 130 is located above the fifth roller assembly 340, and the sixth roller assembly 350 is located below the fifth roller assembly 340, and the third roller assembly 130 and the fifth roller assembly 340 jointly form a fourth roller pressing channel, which is used for the electrode film 210 to pass through, and the fifth roller assembly 340 and the sixth roller assembly 350 jointly form a fifth roller pressing channel, which is used for the electrode film 210 and the foil 220 to pass through. The execution end of the third height adjustment assembly 360 is connected to the sixth roller assembly 350, and the third height adjustment assembly 360 is configured to drive the sixth roller assembly 350 to move in the up-down direction to adjust the up-down size of the fifth roller pressing channel.

[0090] It can be understood that the dry electrode pressing device 100, the fifth pressing roller assembly 340, the sixth pressing roller assembly 350 and the third height adjustment assembly 360 can together form a rolling mechanism of the dry coating machine to complete the hot pressing lamination of the foil 220 and the electrode film 210. The fifth pressing roller assembly 340, the sixth pressing roller assembly 350 and the third pressing roller assembly 130 have the same structure, and the rotation direction of the fifth pressing roller assembly 340 is opposite to that of the third pressing roller assembly 130 and the sixth pressing roller assembly 350. The third pressing roller assembly 130 rotates clockwise, the fifth pressing roller assembly 340 rotates counterclockwise, and the sixth pressing roller assembly 350 rotates clockwise.

[0091] The fourth rolling channel and the fifth rolling channel are both through in the left-right direction, the left end opening of the fourth rolling channel is set as the first outlet, the right end opening of the fourth rolling channel is set as the first inlet, the left end opening of the fifth rolling channel is set as the second inlet, and the right end opening of the fifth rolling channel is set as the second outlet. Therefore, the electrode film 210 coming out of the second rolling channel enters the fourth rolling channel from the first inlet and leaves the fourth rolling channel from the first outlet, and then enters the fifth rolling channel through the second inlet together with the foil 220, so that the electrode film 210 is laminated on the surface of the foil 220 to form an electrode sheet, and the electrode sheet leaves the fifth rolling channel from the second outlet.

[0092] The third height adjustment assembly 360 may have the same structure as the first height adjustment assembly, and may be capable of adjusting the vertical distance between the fifth pressing roller assembly 340 and the sixth pressing roller assembly 350 with high precision.

[0093] In addition, the dry coating machine further includes a heating component 370 and an unwinding component. Among them, the foil material roll is arranged on the unwinding roller 310 of the unwinding component. By continuously releasing the foil material roll, the foil 220 can enter the fifth roll pressing channel following the electrode film 210 manufactured by the dry electrode pressing device 100. The heating component 370 can heat at least one surface of the foil 220 by infrared heating, making it easier for the electrode film 210 to be laminated on the foil 220.

[0094] In addition, the dry coating machine further includes a roll surface treatment component 170 with the above structure. Roll surface treatment components 170 are respectively provided for the fifth roll component 340 and the sixth roll component 350, which can scrape off waste materials and apply oil to the roll surface.

[0095] The dry coating machine further includes a seventh roll component 380. The seventh roll component 380 is arranged opposite to the fifth roll component 340 and cooperates with each other, and can press the electrode film 210 coming out of the fourth roll pressing channel tightly against the roll surface of the fifth roll component 340.

[0096] The dry coating machine provided in the second aspect of the present invention adopts the dry electrode pressing device 100 of the first aspect embodiment, which can improve the rolling accuracy of the electrode film 210, thereby improving the manufacturing quality of the electrode plate.

[0097] As Figures 1 to 4 shown, the solid-state battery production line according to the third aspect embodiment of the present invention includes a dry coating machine as in the second aspect embodiment.

[0098] During the manufacturing process of the solid-state battery, it is necessary to manufacture components of the solid-state battery such as electrode plates and electrolytes. This embodiment only makes improvements to the structure of the dry coating machine. The rest of the equipment in the solid-state battery production line belongs to the prior art. Those skilled in the art should understand the structures and working principles of the rest of the equipment and will not be elaborated here. Through the above dry coating machine, electrode plates with good quality can be provided for the manufacturing work of the solid-state battery.

[0099] Adopting the dry coating machine of the second aspect embodiment in the solid-state battery production line can improve the coating effect, and thus make the solid-state battery have higher manufacturing quality.

[0100] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc., mean 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 present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0101] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. Dry electrode pressing device, characterized in that: include: A first pressure roller assembly (110); a second pressing roller assembly (120), which is arranged opposite to the first pressing roller assembly (110) along a first direction and together forms a first pressing channel, wherein the upper end opening of the first pressing channel is a feed inlet; a third pressing roller assembly (130) located below the second pressing roller assembly (120), the third pressing roller assembly (130) and the second pressing roller assembly (120) being arranged opposite to each other and jointly forming a second pressing channel, the second pressing channel being connected to the first pressing channel for the electrode film (210) to pass through; A first height adjustment component, an execution end of which is connected to the third pressing roller component (130), the first height adjustment component being configured to drive the third pressing roller component (130) to move in an up-down direction to adjust the up-down dimensions of the second pressing channel, the first direction being perpendicular to the up-down direction.

2. The dry electrode pressing device according to claim 1, characterized in that: It also includes a horizontal adjustment component (113), the execution end of which is connected to the first pressing roller component (110), and the horizontal adjustment component (113) is configured to drive the first pressing roller component (110) to move along a first direction to adjust the size of the first pressing channel in the first direction.

3. The dry electrode pressing device according to claim 2, characterized in that: The first pressing roller assembly (110) comprises a first pressing roller member (111) and a second pressing roller member (112); the second pressing roller member (112), the first pressing roller member (111) and the second pressing roller assembly (120) are arranged in sequence along a first direction; the roller surface of the second pressing roller member (112) contacts the roller surface of the first pressing roller member (111); the roller surface of the first pressing roller member (111) and the roller surface of the second pressing roller assembly (120) jointly define the first rolling channel; the outer diameter of the first pressing roller member (111) is smaller than the outer diameter of the second pressing roller member (112) and the outer diameter of the second pressing roller assembly (120).

4. The dry electrode pressing device according to any one of claims 1 to 3, characterized in that: The invention also comprises a roller surface processing assembly (170), wherein the roller surface processing assembly (170) comprises an oiling component and / or a scraper component, wherein the oiling component is configured to apply oil to the roller surface, and the scraper component is configured to scrape away waste material on the roller surface; at least three roller surface processing assemblies (170) are provided, and are respectively arranged corresponding to the first pressing roller assembly (110), the second pressing roller assembly (120), and the third pressing roller assembly (130).

5. The dry electrode pressing device according to claim 1, characterized in that: The first height adjustment component comprises a linear drive component (140), a first limiting component (150) and a second limiting component (160); the first limiting component (150) is arranged on the third pressure roller component (130); the second limiting component (160) is arranged on the second pressure roller component (120); at least one of the first limiting component (150) and the second limiting component (160) is configured to be adjustable up and down; an execution end of the linear drive component (140) is connected to the third pressure roller component (130); the linear drive component (140) is configured to drive the third pressure roller component (130) to move in the up and down direction so that the first limiting component (150) and the second limiting component (160) are in contact with each other.

6. The dry electrode pressing device according to claim 5, characterized in that: The first limiting component (150) comprises a first limiting component (152) and a position adjusting component (151); the position adjusting component (151) is arranged on the third pressure roller assembly (130); an execution end of the position adjusting component (151) is connected to the first limiting component (152); the position adjusting component (151) is configured to be able to adjust the position of the first limiting component (152) in a horizontal direction; a first inclined surface is provided at an upper end of the first limiting component (152); the second limiting component (160) comprises a second limiting component; a second inclined surface is provided at a lower end of the second limiting component; the second inclined surface is in close contact with the first inclined surface.

7. Dry coating machine, characterized in that, It comprises the dry electrode pressing device (100) as claimed in any one of claims 1 to 6.

8. The dry coating machine according to claim 7, characterized in that: The invention also comprises a fourth pressing roller assembly (320) and a second height adjustment assembly (330), wherein the fourth pressing roller assembly (320) is located below the third pressing roller assembly (130), the fourth pressing roller assembly (320) and the third pressing roller assembly (130) are arranged opposite to each other, and together form a third pressing channel for the electrode film (210) and the foil material (220) to pass through, the execution end of the second height adjustment assembly (330) is connected to the fourth pressing roller assembly (320), and the second height adjustment assembly (330) is configured to drive the fourth pressing roller assembly (320) to move in the up-down direction so as to adjust the up-down dimensions of the third pressing channel.

9. The dry coating machine according to claim 7, characterized in that: The invention also comprises a fifth pressing roller assembly (340), a sixth pressing roller assembly (350) and a third height adjustment assembly (360); the third pressing roller assembly (130), the fifth pressing roller assembly (340) and the sixth pressing roller assembly (350) are arranged in sequence along the up-down direction; the third pressing roller assembly (130) and the fifth pressing roller assembly (340) together form a fourth pressing channel for the electrode film (210) to pass through; the fifth pressing roller assembly (340) and the sixth pressing roller assembly (350) together form a fifth pressing channel for the electrode film (210) and the foil (220) to pass through; the execution end of the third height adjustment assembly (360) is connected to the sixth pressing roller assembly (350); the third height adjustment assembly (360) is configured to drive the sixth pressing roller assembly (350) to move along the up-down direction so as to adjust the up-down dimensions of the fifth pressing channel.

10. Solid-state battery production line, characterized in that: Comprising the dry coating machine as described in any one of claims 7 to 9.

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