Rolling dry-method coating machine and solid-state battery production line

Abstract

The utility model discloses a roll-in dry method coater, belongs to solid state battery production technical field, roll-in dry method coater includes: a mixture conveying mechanism, roll-in mechanism and thickness detection mechanism, roll-in mechanism includes first rotary driver, frame and two first press roll, first press roll with frame rotary connection, and the thickness detection mechanism includes the first rotary driver, the frame rotary connection and two second press roll with the frame rotary connection. The first rotary driver is in transmission connection with the first compression rollers, the two first compression rollers are parallel to each other, a rolling space is formed between the two first compression rollers, the mixture conveying mechanism is configured to convey a mixture to the rolling space so that the mixture can be formed into an electrode film, and at least one first compression roller is movably connected with the rack so as to adjust the size of the rolling space; the thickness detection mechanism is configured to detect the thickness of the electrode film, so that the thickness control of the electrode film is more accurate.

Description

Technical Field

[0001] This utility model relates to the field of solid-state battery production technology, and in particular to a roller dry coating machine and a solid-state battery production line. Background Technology

[0002] Solid-state battery fabrication technology has become a key technology for the electrification development of various industries, among which dry electrode fabrication technology has become a current research hotspot. Dry electrode fabrication technology involves feeding a fibrous mixture to a roller group for rolling to form an electrode film with self-supporting properties.

[0003] In related technologies, the thickness of electrode films formed by dry electrode production equipment is currently difficult to control. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a roller-pressed dry coating machine, which enables more precise control of the electrode film thickness.

[0005] This utility model also proposes a solid-state battery production line.

[0006] A dry coating machine according to a first aspect of the present invention includes: a mixture conveying mechanism; a roller pressing mechanism including a first rotary driver, a frame, and two first pressure rollers, the first pressure rollers being rotatably connected to the frame, the first rotary driver being drively connected to the first pressure rollers, the two first pressure rollers being parallel to each other, and a roller pressing gap being constructed between the two first pressure rollers; the mixture conveying mechanism being configured to convey the mixture to the roller pressing gap, so that the mixture is formed into an electrode film; at least one first pressure roller being movably connected to the frame to adjust the size of the roller pressing gap; and a thickness detection mechanism being configured to detect the thickness of the electrode film.

[0007] The dry coating machine according to the present invention has at least the following advantages: the roller pressing mechanism includes two first pressure rollers rotatably connected to the frame, the two first pressure rollers are parallel to each other, and a roller pressing gap is constructed between the two first pressure rollers. The mixture conveying mechanism can convey the fiberized mixture to the roller pressing gap between the two first pressure rollers. The first rotary driver is used to drive the first pressure rollers to rotate. Under the joint roller pressing action of the two first pressure rollers, the relatively loose mixture is formed into an electrode film with self-supporting characteristics. The dry coating machine also includes a thickness detection mechanism, which is used to detect the thickness of the formed electrode film. At least one first pressure roller is movably connected to the frame. The user can compare the detection result of the thickness detection mechanism with the preset thickness, and adjust the size of the roller pressing gap by adjusting the relative position relationship between the first pressure roller and the frame, so that the electrode film formed by roller pressing can reach the preset thickness, making the thickness control of the electrode film more precise.

[0008] According to some embodiments of the present application, the roller pressing mechanism further comprises two second rollers, the roller diameter of the second rollers is greater than that of the first rollers, both of the second rollers are rotationally connected with the rack, and both of the second rollers abut with the first rollers respectively.

[0009] Specifically, considering that the ratio of the length to the roller diameter of the first roller is relatively large, the first roller may be bent and deformed greatly in a long-time roller pressing operation, which leads to uneven thickness of the electrode film. The roller pressing mechanism further comprises two second rollers, the roller diameter of the two second rollers is greater than that of the first rollers, and both of the second rollers are rotationally connected with the rack, and both of the second rollers abut with the first rollers respectively. Through the first roller with a small roller diameter for high-precision roller pressing of the mixture and the two second rollers with a large roller diameter for supporting the first roller, the bending deformation of the first roller in the radial direction is reduced or avoided.

[0010] According to some embodiments of the present application, two roller pressing mechanisms are arranged, the two roller pressing mechanisms are a first roller pressing mechanism and a second roller pressing mechanism respectively, the mixture conveying mechanism sequentially conveys the mixture to the first roller pressing mechanism and the second roller pressing mechanism, and the roller pressing spacing of the second roller pressing mechanism is smaller than that of the first roller pressing mechanism.

[0011] Specifically, the roller dry coating machine is provided with two roller pressing mechanisms, the two roller pressing mechanisms are a first roller pressing mechanism and a second roller pressing mechanism respectively, the mixture conveying mechanism sequentially conveys the mixture to the first roller pressing mechanism and the second roller pressing mechanism, so as to realize multiple roller pressing forming of the mixture. The first roller pressing mechanism is used for calendering and forming the mixture into an electrode film, the roller pressing spacing of the second roller pressing mechanism is smaller than that of the first roller pressing mechanism, so as to realize thinning processing of the electrode film, gradually reduce the thickness of the electrode film to a preset thickness, and improve the forming precision of the electrode film and the control precision of the thickness of the electrode film.

[0012] According to some embodiments of the present application, in the first roller pressing mechanism, the two first rollers are arranged along a transverse plane; and / or,

[0013] In the second roller pressing mechanism, the two first rollers are arranged in an up-down manner.

[0014] Optionally, in the first rolling mechanism, the two first compression rollers are arranged along a transverse plane, so that the rolling space of the first rolling mechanism is arranged in an up-down communication manner, the mixture conveying mechanism can convey the mixture into the rolling space of the first rolling mechanism from top to bottom, and the two first compression rollers can bear the falling mixture, and the two first compression rollers are rotationally connected with the rack to realize compression molding of the mixture, so that the mixture is molded into an electrode film; optionally, in the second rolling mechanism, the two first compression rollers are arranged in an up-down manner, so that the rolling space of the second rolling mechanism is arranged in a transverse communication manner, the mixture conveying mechanism can convey the molded electrode film into the rolling space of the second rolling mechanism in a transverse manner to realize thinning processing of the electrode film, and the arrangement mode of the two first compression rollers of the second rolling mechanism is beneficial to reducing the floor area of the second rolling mechanism.

[0015] According to some embodiments of the present application, the rolling mechanism further comprises a first driving assembly connected with the rack and rotationally connected with the at least one first compression roller, and the first driving assembly is configured to drive the two first compression rollers to approach or move away from each other; and / or,

[0016] The thickness detection mechanism comprises a laser emitter and a laser receiver arranged along the thickness direction of the electrode film, and the laser receiver is configured to receive the laser emitted by the laser emitter and passing through the electrode film.

[0017] Optionally, the rolling mechanism further comprises a first driving assembly connected with the rack and rotationally connected with the at least one first compression roller, and the first driving assembly is configured to drive the two first compression rollers to approach or move away from each other, i.e. to realize the function of automatically adjusting the rolling space, which is beneficial to reducing the labor intensity of the user; optionally, the thickness detection mechanism comprises a laser emitter and a laser receiver arranged along the thickness direction of the electrode film, the laser emitter is used for emitting laser, and the laser receiver is used for receiving laser passing through the electrode film, according to the different absorption degrees of the laser due to the different thicknesses of the electrode film, the thickness detection mechanism can calculate the thickness of the film to realize high-precision and non-contact thickness detection.

[0018] According to some embodiments of the present application, the rolling dry coating machine further comprises a winding roller and a second rotary driver, and the end of the electrode film is wound around the winding roller, and the second rotary driver is configured to drive the winding roller to rotate.

[0019] The rolling dry coating machine further comprises a winding roller and a second rotary driver, and the end of the molded electrode film is wound around the winding roller, and the second rotary driver is configured to drive the winding roller to rotate, so that the winding roller applies a traction force to the electrode film, the molded electrode film is wound to the winding roller, and the electrode film is wound in a roll shape, so as to realize storage and transportation of the electrode film.

[0020] According to some embodiments of the present application, the roll dry coating machine further comprises a second driving assembly, a tension detector, a detection roller and a plurality of rotating rollers, the detection roller and the plurality of rotating rollers are arranged between the rolling mechanism and the winding roller, the electrode film is wound around the detection roller and the plurality of rotating rollers, the tension detector is connected with the detection roller to detect the tension of the electrode film winding around the detection roller, the second driving assembly is connected with at least one rotating roller, and the second driving assembly is configured to drive the plurality of rotating rollers to move close to or away from each other.

[0021] Specifically, in order to further control the thickness and forming precision of the electrode film, the roll dry coating machine further comprises a second driving assembly, a tension detector, a detection roller and a plurality of rotating rollers, the detection roller and the plurality of rotating rollers are arranged between the rolling mechanism and the winding roller, the electrode film is wound around the detection roller and the plurality of rotating rollers to realize continuous conveying of the electrode film, the tension detector is connected with the detection roller to detect the tension of the electrode film winding around the detection roller, whether the tension reaches a preset value, the second driving assembly is drivingly connected with at least one rotating roller to drive the plurality of rotating rollers to move close to or away from each other, so as to adjust the tension of the electrode film wound around the rotating roller, thereby realizing stable conveying of the electrode film, cooperating with the rolling of the rolling mechanism and the winding of the winding roller to improve the thickness control precision and forming precision of the electrode film.

[0022] According to some embodiments of the present application, the roll dry coating machine further comprises two cutting knives arranged along the width direction of the electrode film, the cutting knives are arranged between the rolling mechanism and the winding roller, and the cutting knives are configured to cut the edges of the electrode film to control the width of the electrode film.

[0023] Considering that when the mixed material or the electrode film is rolled, the electrode film will be stretched to a certain extent along the width direction, resulting in low width control precision of the electrode film, the roll dry coating machine further comprises two cutting knives arranged along the width direction of the electrode film, the cutting knives are arranged between the rolling mechanism and the winding roller, and the cutting knives are configured to cut the edges of the electrode film during conveying of the electrode film from the rolling mechanism to the winding roller, so that the width of the electrode film is controlled to be the distance between the two cutting knives, thereby improving the forming precision of the electrode film.

[0024] According to some embodiments of the present application, the roll dry coating machine further comprises a deviation correcting roller and a multi-directional driving assembly, the deviation correcting roller is arranged between the rolling mechanism and the winding roller, the electrode film is wound around the deviation correcting roller, the multi-directional driving assembly is connected with the deviation correcting roller, and the multi-directional driving assembly is configured to drive the deviation correcting roller to move along a plurality of mutually perpendicular axes.

[0025] Specifically, considering the potential for skewing during the electrode film's transport process, which could affect the accuracy of winding and subsequent processing, this roller-pressed dry coating machine also includes a correction roller and a multi-directional drive assembly. The correction roller is positioned between the roller pressing mechanism and the winding roller, allowing the electrode film to be wound around it. The multi-directional drive assembly is connected to the correction roller, driving it to move along multiple mutually perpendicular axes. This corrects the skewing electrode film to the preset transport path, thereby improving the transport accuracy of the electrode film and consequently improving the accuracy of winding and subsequent processing.

[0026] According to a second aspect of the present invention, a solid-state battery production line includes the roller dry coating machine shown in the first aspect.

[0027] The solid-state battery production line according to the embodiments of the present invention has at least the following beneficial effects: The solid-state battery production line includes the roller pressing dry coating machine shown in the first aspect. The roller pressing mechanism includes two first pressure rollers rotatably connected to the frame. The two first pressure rollers are parallel to each other, and a roller pressing gap is constructed between the two first pressure rollers. The mixing material conveying mechanism can convey the fiberized mixture to the roller pressing gap between the two first pressure rollers. The first rotary driver is used to drive the first pressure rollers to rotate. Under the joint roller pressing action of the two first pressure rollers, the relatively loose mixture is formed into an electrode film with self-supporting characteristics. The roller pressing dry coating machine also includes a thickness detection mechanism, which is used to detect the thickness of the formed electrode film. At least one first pressure roller is movably connected to the frame. The user can compare the detection result of the thickness detection mechanism with the preset thickness, and adjust the size of the roller pressing gap by adjusting the relative position relationship between the first pressure roller and the frame, so that the electrode film formed by roller pressing can reach the preset thickness, making the thickness control of the electrode film more precise.

[0028] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0030] Figure 1 This is a schematic diagram of the structure of a roller-pressed dry coating machine according to one embodiment of the present invention, showing one of its layout configurations.

[0031] Figure 2 for Figure 1 The diagram shows a partial structural schematic of a roller-pressed dry coating machine.

[0032] Figure 3 for Figure 2Structure schematic view of another part of the roll dry coating machine shown in the middle;

[0033] Figure 4 Structure schematic view of the roll dry coating machine in another layout mode for an embodiment of the utility model;

[0034] Figure 5 For Figure 4 Structure schematic view of part of the roll dry coating machine shown in the middle;

[0035] Figure 6 For Figure 4 Structure schematic view of another part of the roll dry coating machine shown in the middle.

[0036] Reference signs:

[0037] 100, mixed material conveying mechanism; 110, vibrating screen; 120, metering scale; 130, discharge hopper;

[0038] 210, first roll pressing mechanism; 211, rack; 212, first compression roller; 213, second compression roller; 220, second roll pressing mechanism;

[0039] 300, thickness detection mechanism; 310, laser emitter; 320, laser receiver;

[0040] 410, winding roller; 420, second rotary driver;

[0041] 510, tension detector; 520, detection roller; 530, second driving assembly; 540, rotating roller;

[0042] 600, cutter;

[0043] 710, deviation correction roller; 720, multi-directional driving assembly. DETAILED DESCRIPTION

[0044] The embodiments of the utility model are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the utility model, and cannot be understood as limiting the utility model.

[0045] In the description of the utility model, it is understood that the orientation description, such as the orientation or position relationship of the upper, lower, etc. is based on the orientation or position relationship shown in the drawings, only for the convenience of describing the utility model and simplifying the description, and is not indicative or implied that the indicated device or element must have a specific orientation, a specific orientation structure and operation, therefore, it cannot be understood as limiting the utility model.

[0046] In the description of the utility model, more refers to two or more. If it is described to first, second, it is only used for distinguishing technical features for the purpose, and can not be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0047] In the description of the utility model, unless otherwise explicitly limited, the words such as setting, installation, connection should be broadly understood, and the specific meaning of the above words in the utility model can be reasonably determined by the person skilled in the art in combination with the specific content of the technical scheme.

[0048] Referring to Figures 1 to 6 The roll dry coating machine of one embodiment of the utility model, including: mixed material conveying mechanism 100, roll mechanism and thickness detection mechanism 300.

[0049] Referring to Figure 1 , Figure 2 And Figure 3 The mixed material conveying mechanism 100 includes vibrating screen 110, metering scale 120, hopper 130 and conveyor belt assembly, vibrating screen 110 includes container and vibration motor, mixed material can be contained in the container, vibration motor can drive the container to vibrate, so that the mixed material after fiberization treatment is fully mixed, and the mixed material is in loose state, so as to realize the weighing and conveying of mixed material.

[0050] Referring to Figure 1 , Figure 2 And Figure 3 The conveyor belt assembly is located below the vibrating screen 110, so that the mixed material after vibration treatment is conveyed to the hopper 130, the metering scale 120 can be used to weigh the weight of the mixed material in the hopper 130, the hopper 130 can be used to carry the mixed material in the hopper 130, and the mixed material is conveyed to the roll mechanism. The conveyor belt assembly realizes the conveying of mixed material by the rotation of the conveyor belt, and the structure of the conveyor belt assembly belongs to the conventional technical means in the field, which will not be described here.

[0051] Referring to Figure 1 , Figure 2 And Figure 3 The roll mechanism includes first rotary driver, rack 211 and two first compression rollers 212, the first compression roller 212 is rotatably connected with the rack 211, the first rotary driver is in transmission connection with the first compression roller 212, so as to drive the first compression roller 212 to rotate, the two first compression rollers 212 are parallel to each other, and the roll spacing is constructed between the two first compression rollers 212.

[0052] Referring to Figure 1 , Figure 2 And Figure 3As shown, the mixture conveying mechanism 100 is configured to convey the mixture into the nip of the two first compression rollers 212, the first rotary driver is configured to drive the first compression rollers 212 to rotate, and the mixture is shaped into the electrode film with self-supporting characteristics under the common compression of the two first compression rollers 212.

[0053] Referring to Figure 1 , Figure 2 and Figure 3 , the roll dry coating machine further comprises a thickness detection mechanism 300, the thickness detection mechanism 300 is configured to detect the thickness of the shaped electrode film, and the at least one first compression roller 212 is movably connected with the frame 211 to adjust the size of the nip.

[0054] Referring to Figure 1 , Figure 2 and Figure 3 , the user can compare the detection result of the thickness detection mechanism 300 with the preset thickness, and adjust the relative position relationship between the first compression roller 212 and the frame 211 to adjust the size of the nip, so that the electrode film shaped by the roll can reach the preset thickness, and the thickness control of the electrode film is more accurate.

[0055] Referring to Figure 1 , Figure 2 and Figure 3 , the electrode film can be combined with the foil of the external device to form a positive electrode film or a negative electrode film, and the solid-state battery can be prepared by combining the positive electrode film, the negative electrode film and the solid-state electrolyte film.

[0056] Referring to Figure 1 , Figure 2 and Figure 3 , it can be understood that, considering that the ratio of the length to the roll diameter of the first compression roller 212 is relatively large, the first compression roller 212 may be bent and deformed in a long-time roll operation, resulting in uneven thickness of the electrode film. The roll mechanism further comprises two second compression rollers 213, the roll diameters of the two second compression rollers 213 are greater than the roll diameter of the first compression roller 212, and the two second compression rollers 213 are rotatably connected with the frame 211, and the two second compression rollers 213 are respectively in abutment with the two first compression rollers 212. By means of the first compression roller 212 with a small roll diameter for high-precision rolling of the mixture or the electrode film, and the two second compression rollers 213 with large roll diameters for supporting the first compression roller 212, the bending deformation of the first compression roller 212 in the radial direction can be reduced or avoided.

[0057] Referring to Figure 1 , Figure 2 and Figure 3As shown, specifically, the first rotating driver can include one or more first rotating motors, which can drive the first compression roller 212 and the second compression roller 213 to rotate synchronously through a transmission structure such as a gear or a pulley.

[0058] With reference to Figure 1 , Figure 2 and Figure 3 , it can be understood that the roller pressing mechanism further includes a first driving assembly connected with the rack 211 and rotationally connected with the at least one first compression roller 212, and the first driving assembly is configured to drive the two first compression rollers 212 to approach or move away from each other, i.e., to realize the function of automatically adjusting the roller pressing interval, which is conducive to reducing the labor intensity of the user.

[0059] With reference to Figure 1 , Figure 2 and Figure 3 , specifically, the first driving assembly can be a linear driving mechanism such as an electric push rod, a hydraulic push rod, a pneumatic push rod, a screw sliding block mechanism, or a crank connecting rod mechanism, so as to drive the two first compression rollers 212 to relatively approach or move away from each other, so as to realize the adjustment of the roller pressing interval.

[0060] It should be understood that in other embodiments, the first driving assembly includes a second rotating motor and a first connecting rod, two ends of the first connecting rod are respectively connected with the second rotating motor and the first rotating driver, the first rotating driver is in transmission connection with the first compression roller 212, the first connecting rod is driven to rotate by the second rotating motor, so as to drive the first rotating driver and the first compression roller 212 to swing, so as to drive the two first compression rollers 212 to approach or move away from each other, i.e., to realize the function of automatically adjusting the roller pressing interval, which is conducive to reducing the labor intensity of the user.

[0061] With reference to Figure 1 , Figure 2 and Figure 3 , it can be understood that in the present embodiment, two roller pressing mechanisms are provided, and the two roller pressing mechanisms are respectively a first roller pressing mechanism 210 and a second roller pressing mechanism 220, the mixed material conveying mechanism 100 sequentially conveys the mixed material to the first roller pressing mechanism 210 and the second roller pressing mechanism 220, and the roller pressing interval of the second roller pressing mechanism 220 is smaller than that of the first roller pressing mechanism 210.

[0062] With reference to Figure 1 , Figure 2 and Figure 3 , the first roller pressing mechanism 210 is used for calendering the mixed material into an electrode film, and the roller pressing interval of the second roller pressing mechanism 220 is smaller than that of the first roller pressing mechanism 210, so as to realize the thinning treatment of the electrode film, so that the thickness of the electrode film gradually decreases to a preset thickness, which is conducive to improving the forming precision of the electrode film and improving the control precision of the thickness of the electrode film.

[0063] Referring to Figure 1 , Figure 2 and Figure 3 , it can be understood that, in the first roller pressing mechanism 210, the two first pressing rollers 212 are arranged along the transverse plane, and the two second pressing rollers 213 are arranged along the transverse plane, so that the roller pressing spaces of the first roller pressing mechanism 210 are arranged in communication in the up-down direction, the mixture conveying mechanism 100 can convey the mixture into the roller pressing spaces of the first roller pressing mechanism 210 from top to bottom, the two first pressing rollers 212 can bear the falling mixture, and the two first pressing rollers 212 are rotationally connected with the rack 211 to realize the calendering of the mixture to form the electrode film.

[0064] Referring to Figure 1 , Figure 2 and Figure 3 , it can be understood that, in the second roller pressing mechanism 220, the two first pressing rollers 212 are arranged in the up-down direction, and the two second pressing rollers 213 are arranged in the up-down direction, so that the roller pressing spaces of the second roller pressing mechanism 220 are arranged in communication in the transverse direction, the mixture conveying mechanism 100 can convey the formed electrode film into the roller pressing spaces of the second roller pressing mechanism 220 in the transverse direction to realize the thinning of the electrode film, and the arrangement of the two first pressing rollers 212 of the second roller pressing mechanism 220 is beneficial to reducing the floor area of the second roller pressing mechanism 220.

[0065] It should be understood that, in other embodiments, three or more roller pressing mechanisms are provided, the roller pressing spaces of the plurality of roller pressing mechanisms are sequentially reduced, and the mixture conveying mechanism 100 sequentially conveys the mixture to the plurality of roller pressing mechanisms to realize the multiple roller pressing of the mixture or the electrode film, so that the thickness of the electrode film gradually decreases to the preset thickness, which is beneficial to improving the forming precision of the electrode film and improving the control precision of the thickness of the electrode film.

[0066] It should be understood that, in other embodiments, the first roller pressing mechanism 210 and the second roller pressing mechanism 220 can share one rack 211 to realize the rotational connection of the first pressing roller 212 and the second pressing roller 213.

[0067] Referring to Figure 1 , Figure 2 and Figure 3 , it can be understood that, in this embodiment, the thickness detection mechanism 300 includes a laser emitter 310 and a laser receiver 320 arranged along the thickness direction of the electrode film, the laser emitter 310 is configured to emit laser, and the laser receiver 320 is configured to receive the laser emitted by the laser emitter 310 and passing through the electrode film.

[0068] Referring to Figure 1 , Figure 2 and Figure 3As shown, specifically, according to the different absorption degrees of the laser with different thicknesses of the electrode film, the laser emitter 310 emits a beam of X-rays and measures the initial intensity thereof, the X-rays are received by the laser receiver 320 after penetrating the electrode film, the laser receiver 320 measures the intensity of the X-rays after receiving the same, and the thickness of the electrode film is determined by comparing the initial intensity of the laser emitted by the laser emitter 310 with the intensity of the laser received by the laser receiver 320.

[0069] It should be understood that, in some other embodiments, the thickness detection mechanism 300 also has the function of area density detection, and the area density of the electrode film can be inferred by measuring the difference in intensity of the X-rays before and after penetrating the electrode film.

[0070] Referring to Figure 1 , Figure 2 and Figure 3 , it can be understood that, in the present embodiment, the roll dry coater further comprises a winding roller 410 and a second rotary driver 420, the end of the electrode film is wound around the winding roller 410, and the second rotary driver 420 is configured to drive the winding roller 410 to rotate.

[0071] Referring to Figure 1 , Figure 2 and Figure 3 , the end of the shaped electrode film is wound around the winding roller 410, and the second rotary driver 420 is configured to drive the winding roller 410 to rotate, so that the winding roller 410 applies a pulling force to the electrode film, so that the shaped electrode film is wound onto the winding roller 410, and the electrode film is wound into a roll shape, so as to realize the storage and transportation of the electrode film. The winding roller 410 and the second rotary driver 420 jointly constitute a winding mechanism.

[0072] Referring to Figure 1 , Figure 2 and Figure 3 , it can be understood that, in order to further control the thickness and shaping precision of the electrode film, the roll dry coater further comprises a second driving assembly 530, a tension detector 510, a detection roller 520 and a plurality of rotating rollers 540, the detection roller 520 and the plurality of rotating rollers 540 are arranged between the rolling mechanism and the winding roller 410, and the electrode film is wound around the detection roller 520 and the plurality of rotating rollers 540 to realize the continuous conveying of the electrode film.

[0073] Referring to Figure 1 , Figure 2 and Figure 3 , the tension detector 510 is connected with the detection roller 520 to detect the tension of the electrode film wound around the detection roller 520 to detect whether the tension reaches a preset value.

[0074] Referring to Figure 1 , Figure 2 and Figure 3As shown, the second driving assembly 530 is connected with the at least one rotating roller 540, and the second driving assembly 530 is configured to drive the plurality of rotating rollers 540 to move closer to or farther away from each other, so as to adjust the tension of the electrode film around the rotating rollers 540, so as to realize stable conveying of the electrode film, and cooperate with the roller pressing mechanism and the winding roller 410 to improve the thickness control precision of the electrode film and the forming precision.

[0075] Referring to Figure 1 , Figure 2 and Figure 3 , specifically, the tension detector 510 obtains the reaction force applied by the electrode film on the detection roller 520, so as to calculate the tension of the electrode film around the detection roller 520.

[0076] Referring to Figure 1 , Figure 2 and Figure 3 , the second driving assembly 530 can be an electric push rod, a hydraulic push rod, a pneumatic push rod, a screw sliding block mechanism, a crank connecting rod mechanism, etc. linear driving mechanism, so as to drive the plurality of rotating rollers 540 to move closer to or farther away from each other, so as to adjust the tension of the electrode film around the rotating rollers 540.

[0077] When the detection value obtained by the tension detector 510 is lower than the preset tension, the second driving assembly 530 can drive the plurality of rotating rollers 540 to move farther away from each other, so that the electrode film is further tensioned between the plurality of rotating rollers 540, that is, the tension of the electrode film at the plurality of rotating rollers 540 is increased. When the detection value obtained by the tension detector 510 is higher than the preset tension, the second driving assembly 530 can drive the plurality of rotating rollers 540 to move closer to each other, so that the electrode film is more relaxed around the plurality of rotating rollers 540, that is, the tension of the electrode film at the plurality of rotating rollers 540 is reduced.

[0078] The tension detector 510, the detection roller 520, the rotating roller 540 and the second driving assembly 530 jointly constitute a tension control mechanism.

[0079] Referring to Figure 1 , Figure 2 and Figure 3 , it should be noted that the detection principle of the tension detector 510 belongs to the conventional technical means in the art, which will not be described here.

[0080] It should be understood that in other embodiments, the second driving assembly 530 includes a third rotary motor and a second connecting rod, the two ends of the second connecting rod are respectively connected with the third rotary motor and the rotating roller 540, and the second connecting rod is driven to rotate by the third rotary motor, so as to drive the rotating roller 540 to swing, so as to drive the plurality of rotating rollers 540 to move closer to or farther away from each other, so as to adjust the tension of the electrode film around the rotating rollers 540.

[0081] Referring toFigure 1 、 Figure 2 and Figure 3 It can be understood that, in the embodiment, considering that the electrode film will be stretched to a certain extent along the width direction when the mixture or the electrode film is rolled, resulting in low width control accuracy of the electrode film, the roll dry coater further comprises two cutters 600 arranged along the width direction of the electrode film, the cutters 600 being arranged between the rolling mechanism and the winding roller 410, and the cutters 600 being configured to cut the edges of the electrode film to control the width of the electrode film.

[0082] Referring to Figure 1 、 Figure 2 and Figure 3 , during the conveying of the electrode film from the rolling mechanism to the winding roller 410, the cutters 600 are configured to cut the edges of the electrode film, so that the width of the electrode film is controlled to be the distance between the two cutters 600, thereby improving the forming accuracy of the electrode film. The two cutters 600 together constitute a cutting mechanism.

[0083] Referring to Figure 1 、 Figure 2 and Figure 3 , it can be understood that, considering that the electrode film may be skewed during the conveying process, affecting the winding accuracy of the electrode film and the accuracy of the reprocessing after unwinding, the roll dry coater further comprises a correction roller 710 and a multi-directional driving assembly 720, the correction roller 710 being arranged between the rolling mechanism and the winding roller 410, the electrode film being wound around the correction roller 710, and the multi-directional driving assembly 720 being connected with the correction roller 710 and being configured to drive the correction roller 710 to move along multiple mutually perpendicular axes.

[0084] Referring to Figure 1 、 Figure 2 and Figure 3 , the multi-directional driving assembly 720 is connected with the correction roller 710 to drive the correction roller 710 to move along multiple mutually perpendicular axes, so as to correct the skewed electrode film to a preset conveying path, thereby improving the conveying accuracy of the electrode film and further improving the winding accuracy of the electrode film and the accuracy of the reprocessing after unwinding.

[0085] Referring to Figure 4 、 Figure 5 and Figure 6 , specifically, the multi-directional driving assembly 720 can be a three-axis motor to drive the correction roller 710 to move on the X-axis, the Y-axis and the Z-axis. The multi-directional driving assembly 720 and the correction roller 710 together constitute a correction mechanism.

[0086] Referring to Figure 4 、 Figure 5 and Figure 6As shown, it can be understood that the roll dry coater can be arranged in the following layout: the outlet end of the mixture conveying mechanism 100 is connected to the inlet end of the first roll mechanism 210, the cutting mechanism and the tension control mechanism are arranged in sequence between the first roll mechanism 210 and the second roll mechanism 220, and the thickness detection mechanism 300, the cutting mechanism, the tension control mechanism and the deviation correction mechanism are arranged in sequence between the second roll mechanism 220 and the winding mechanism.

[0087] Referring to Figure 4 , Figure 5 and Figure 6 , that is, the mixture conveying mechanism 100 can convey loose mixture to the first roll mechanism 210, the first roll mechanism 210 can calender the loose mixture into an electrode film, the cutting mechanism can cut the edges of the electrode film to control the width of the electrode film, the tension control mechanism is used to control the tension of the electrode film around the rotating roller 540 to realize stable conveying of the electrode film, and the electrode film is conveyed to the second roll mechanism 220, and the second roll mechanism 220 can perform thinning treatment on the formed electrode film.

[0088] Referring to Figure 1 , Figure 2 and Figure 3 , the electrode film after the thinning treatment is conveyed to the thickness detection mechanism 300 to detect the thickness of the electrode film, and the user can adjust the roll spacing of the first roll mechanism 210 and the second roll mechanism 220 according to the detection result of the thickness detection mechanism 300 to ensure that the thickness of the formed electrode film is within a predetermined range, and then the electrode film is conveyed to the next cutting mechanism, the next cutting mechanism can cut the edges of the electrode film again to control the width of the electrode film, the next tension control mechanism is used to control the tension of the electrode film around the rotating roller 540 to realize stable conveying of the electrode film, and the electrode film is conveyed to the deviation correction mechanism, the deviation correction mechanism can correct the conveying path of the electrode film to make the electrode film conveyed along a predetermined path to the winding mechanism, and the winding mechanism can realize winding of the electrode film to make the electrode film rewound into a roll.

[0089] Referring to Figure 1 , Figure 2 and Figure 3 , it should be understood that in some other embodiments, the roll dry coater can be arranged in the following layout: the outlet end of the mixture conveying mechanism 100 is connected to the inlet end of the first roll mechanism 210, the cutting mechanism, the tension control mechanism and the deviation correction mechanism are arranged in sequence between the first roll mechanism 210 and the second roll mechanism 220, and the thickness detection mechanism 300, the cutting mechanism, the tension control mechanism and the deviation correction mechanism are arranged in sequence between the second roll mechanism 220 and the winding mechanism.

[0090] Referring to ​、 ​ and ​ As shown in , the loose mixture conveying mechanism 100 can convey the loose mixture to the first rolling mechanism 210, the first rolling mechanism 210 can calender the loose mixture into an electrode film, the cutting mechanism can cut the edges of the electrode film to control the width of the electrode film, the tension control mechanism is used to control the tension of the electrode film around the rotating roller 540 to realize the stable conveying of the electrode film, the deviation correction mechanism can correct the conveying path of the electrode film to make the electrode film conveyed along the preset path to the second rolling mechanism 220, and the second rolling mechanism 220 can thin the formed electrode film.

[0091] ​ As shown in ​ , and ​ , the electrode film after the thinning treatment is conveyed to the thickness detection mechanism 300 to detect the thickness of the electrode film, the user can adjust the rolling distance of the first rolling mechanism 210 and the second rolling mechanism 220 according to the detection result of the thickness detection mechanism 300 to ensure that the thickness of the formed electrode film is within the preset range, then the electrode film is conveyed to the next cutting mechanism, the next cutting mechanism can cut the edges of the electrode film to control the width of the electrode film, the next tension control mechanism is used to control the tension of the electrode film around the rotating roller 540 to realize the stable conveying of the electrode film, and the electrode film is conveyed to the next deviation correction mechanism, the next deviation correction mechanism can correct the conveying path of the electrode film to make the electrode film conveyed along the preset path to the winding mechanism, and the winding mechanism can realize the winding of the electrode film to make the electrode film rewound into a roll.

[0092] As shown in ​ , ​ , and ​ , the solid-state battery production line of one embodiment of the present application comprises the rolling dry coating machine shown in any one of the above embodiments.

[0093] As shown in ​ , ​ , and ​As shown, the solid-state battery production line comprises the roll dry coating machine shown in any one of the above embodiments, the roll mechanism comprises two first rollers 212 rotatably connected with the frame 211, the two first rollers 212 are parallel to each other, and a roll gap is formed between the two first rollers 212, the mixture conveying mechanism 100 can convey the fiberized mixture into the roll gap of the two first rollers 212, and the first rotary driver is used to drive the first rollers 212 to rotate, so that the relatively loose mixture is formed into an electrode film with self-supporting characteristics under the common rolling action of the two first rollers 212, and the roll dry coating machine further comprises a thickness detection mechanism 300 for detecting the thickness of the formed electrode film, and at least one first roller 212 is movably connected with the frame 211, and the user can compare the detection result of the thickness detection mechanism 300 with the preset thickness, and adjust the relative position relationship between the first roller 212 and the frame 211 to adjust the size of the roll gap, so that the roll-formed electrode film can reach the preset thickness, and the thickness control of the electrode film is more accurate.

[0094] 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 various changes can be made within the knowledge range possessed by ordinary skilled in the art without departing from the purpose of the utility model.

Claims

1. A roller-pressed dry coating machine, characterized in that, include: Mixed material conveying mechanism (100); The rolling mechanism includes a first rotary driver, a frame (211), and two first pressure rollers (212). The first pressure rollers (212) are rotatably connected to the frame (211), and the first rotary driver is drively connected to the first pressure rollers (212). The two first pressure rollers (212) are parallel to each other, and a rolling gap is constructed between the two first pressure rollers (212). The mixture conveying mechanism (100) is configured to convey the mixture to the rolling gap to form the mixture into an electrode film. At least one first pressure roller (212) is movably connected to the frame (211) to adjust the size of the rolling gap. A thickness detection mechanism (300) is configured to detect the thickness of the electrode film.

2. The roller-pressed dry coating machine according to claim 1, characterized in that: The roller pressing mechanism further includes two second rollers (213), the diameter of the second rollers (213) is larger than the diameter of the first roller (212), both second rollers (213) are rotatably connected to the frame (211), and the two second rollers (213) abut against the two first rollers (212) respectively.

3. The roller-pressed dry coating machine according to claim 1 or 2, characterized in that: Two roller pressing mechanisms are provided, namely a first roller pressing mechanism (210) and a second roller pressing mechanism (220). The mixture conveying mechanism (100) conveys the mixture to the first roller pressing mechanism (210) and the second roller pressing mechanism (220) in sequence. The roller pressing distance of the second roller pressing mechanism (220) is smaller than the roller pressing distance of the first roller pressing mechanism (210).

4. The roller-pressed dry coating machine according to claim 3, characterized in that: In the first roller pressing mechanism (210), the two first pressure rollers (212) are arranged along a transverse plane; and / or, In the second roller pressing mechanism (220), the two first pressing rollers (212) are arranged vertically.

5. The roller-pressed dry coating machine according to claim 1, characterized in that: The rolling mechanism further includes a first drive assembly connected to the frame (211) and rotatably connected to at least one of the first pressure rollers (212). The first drive assembly is configured to drive the two first pressure rollers (212) toward or away from each other; and / or, The thickness detection mechanism (300) includes a laser emitter (310) and a laser receiver (320) arranged along the thickness direction of the electrode film, the laser receiver (320) being configured to receive laser light emitted by the laser emitter (310) and passing through the electrode film.

6. The roller-pressed dry coating machine according to claim 1, characterized in that: It also includes a take-up roller (410) and a second rotary driver (420), the end of the electrode film being wound around the take-up roller (410), and the second rotary driver (420) being configured to drive the take-up roller (410) to rotate.

7. The roller-pressed dry coating machine according to claim 6, characterized in that: It also includes a second drive assembly (530), a tension detector (510), a detection roller (520), and a plurality of rotating rollers (540). The detection roller (520) and the plurality of rotating rollers (540) are all disposed between the rolling mechanism and the take-up roller (410). The electrode film is wound around the detection roller (520) and the plurality of rotating rollers (540). The tension detector (510) is connected to the detection roller (520) to detect the tension of the electrode film as it passes around the detection roller (520). The second drive assembly (530) is connected to at least one of the rotating rollers (540) and is configured to drive the plurality of rotating rollers (540) to move closer to or further away from each other.

8. The roller-pressed dry coating machine according to claim 6, characterized in that: It also includes two cutters (600) arranged along the width direction of the electrode film, the cutters (600) being disposed between the rolling mechanism and the take-up roller (410), the cutters (600) being configured to cut the edge of the electrode film to control the width of the electrode film.

9. The roller-pressed dry coating machine according to claim 6, characterized in that: It also includes a correction roller (710) and a multi-directional drive assembly (720), the correction roller (710) being disposed between the rolling mechanism and the take-up roller (410), the electrode film being wound around the correction roller (710), the multi-directional drive assembly (720) being connected to the correction roller (710), and the multi-directional drive assembly (720) being configured to drive the correction roller (710) to move along a plurality of mutually perpendicular axes.

10. A solid-state battery production line, characterized in that: Including the roller dry coating machine as described in any one of claims 1 to 9.

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