Unwinding device and composite pole piece preparation system

Abstract

The utility model relates to an unwinding device and a composite pole piece preparation system. The unwinding device comprises a machine frame, an electrode unwinding unit and an electrolyte membrane unwinding unit, the electrode unwinding unit and the electrolyte membrane unwinding unit are installed on the machine frame, the electrode unwinding unit is used for unfolding a coiled material of a pole piece and then conveying the coiled material to a target station according to a set speed, and the electrolyte membrane unwinding unit is used for unfolding a coiled material of an electrolyte membrane and then conveying the coiled material of the electrolyte membrane to the target station according to the same speed of the pole piece; wherein the electrode unwinding unit and the electrolyte membrane unwinding unit are arranged on the rack along the same vertical plane, and unwinding transmission paths of the electrode unwinding unit and the electrolyte membrane unwinding unit are different in form; and unwinding transmission paths of the electrode unwinding unit and the electrolyte membrane unwinding unit are positioned at different heights of the rack and are at least staggered in the longitudinal direction and / or the transverse direction. According to the scheme provided by the invention, synchronous unwinding of the pole piece and the electrolyte membrane in a composite pole piece preparation process can be realized, transverse and longitudinal mounting spaces can be saved, and the overall spatial layout of the unwinding device is optimized.

Description

Technical Field

[0001] This application relates to the field of new energy technology, and in particular to unwinding devices and composite electrode preparation systems. Background Technology

[0002] With the development of new energy technologies, solid-state batteries, with their higher energy density, better safety and longer cycle life, are becoming the focus of industry attention and are regarded as the core development direction of next-generation battery technology.

[0003] In related technologies, composite electrode transfer for solid-state batteries involves high-precision transfer and interface fusion of multiple material layers to achieve heterogeneous integration of the solid electrolyte layer, electrode active layer, and interface buffer layer, which is a key step in solid-state battery production. However, during the composite electrode transfer process, differences in the conveyor belt speeds of the electrodes and electrolyte membranes can easily lead to quality problems during the composite process. Furthermore, defects in the combination of various components result in poor utilization of installation space. Utility Model Content

[0004] To solve or partially solve the problems existing in the related technologies, this application provides an unwinding device and a composite electrode preparation system, which can not only realize the synchronous unwinding of the electrode and electrolyte membrane in the composite electrode preparation process, but also save horizontal and vertical installation space and optimize the overall space layout of the unwinding device.

[0005] The first aspect of this application provides an unwinding device, comprising:

[0006] The machine frame and the electrode unwinding unit and the electrolyte membrane unwinding unit installed on the machine frame, the electrode unwinding unit is used to unwind the electrode roll and transport it to the target station at a set speed, and the electrolyte membrane unwinding unit is used to unwind the electrolyte membrane roll and transport it to the target station at the same speed as the electrode.

[0007] The electrode unwinding unit and the electrolyte membrane unwinding unit are arranged on the same vertical plane on the frame, and the unwinding transport paths of the electrode unwinding unit and the electrolyte membrane unwinding unit are different in shape; the unwinding transport paths of the electrode unwinding unit and the electrolyte membrane unwinding unit are located at different heights on the frame, and are staggered at least in the longitudinal and / or transverse directions.

[0008] In one embodiment, the electrode unwinding unit and the electrolyte membrane unwinding unit include at least:

[0009] Electrode unwinding roller and electrolyte membrane unwinding roller are used to carry the rolls of electrode and electrolyte membrane respectively, and to unwind the rolls of electrode and electrolyte membrane at the same rate;

[0010] The alignment mechanism is used to align the position of the electrode and the electrolyte membrane so that the transmission direction of the electrode and the electrolyte membrane after unfolding is along a predetermined trajectory.

[0011] In one embodiment, the electrode unwinding unit and the electrolyte membrane unwinding unit further include:

[0012] A tape-connecting platform, comprising a base and two fixing portions disposed on the base, the two fixing portions being spaced apart in the transmission direction of the electrode and the electrolyte membrane, with tape-connecting operation portions provided in the spaced-apart areas; and / or,

[0013] A cleaning assembly, comprising a brush component and / or an iron removal component for contacting the outer surfaces of both sides of the electrode and the electrolyte membrane, wherein the brush component is used to remove dust and impurities adhering to the surface of the electrode or electrolyte membrane during transport, and the iron removal component is used to remove iron impurities adhering to the surface of the electrode or electrolyte membrane; and / or,

[0014] A tension control mechanism is used to control the tension of the electrode and the electrolyte membrane during transmission within a set range.

[0015] In one embodiment, the device further includes a first guide roller, which guides the electrode released by the electrode unwinding roller to be transmitted horizontally to the correction mechanism. The correction mechanism is located on the input side of the tape receiving platform and is disposed adjacent to the tape receiving platform.

[0016] In one embodiment, a second guide roller is further included, disposed on the output side of the tape receiving platform. The second guide roller is used to guide the electrolyte membrane output from the tape receiving platform to be vertically transmitted to the cleaning assembly, the cleaning assembly being located at an adjacent position downstream of the second guide roller; and / or, the second guide roller is used to guide the electrode or the electrolyte membrane to be vertically transmitted to the tension control mechanism, wherein the tension control mechanism is located at an adjacent position downstream of the second guide roller.

[0017] In one embodiment, the device further includes: a third guide roller, located downstream of the cleaning component, for leading the electrode and electrolyte membrane output by the cleaning component to the target station; and / or, the third guide roller is located downstream of the tension control mechanism, for leading the electrolyte membrane output by the tension control mechanism to the target station.

[0018] In one embodiment, the correction mechanism includes a correction sensing component and a correction execution component. The correction sensing component is used to sense the position information of the electrode and the electrolyte membrane, and the correction execution component is used to adjust the offset of the electrode and the electrolyte membrane during the transmission process according to the position information.

[0019] The tension control mechanism includes a tension sensor, a tension controller, and a moving roller assembly. The tension sensor and the moving roller assembly are electrically connected to the tension controller. The tension controller receives tension information of the electrode and the electrolyte membrane detected by the tension sensor and controls the moving roller assembly to adjust the tension of the electrode and the electrolyte membrane to a predetermined value based on the tension information.

[0020] In one embodiment, the correction mechanism, the tape-connecting platform, the cleaning component, and the tension control mechanism in the electrode unwinding unit and the electrolyte membrane unwinding unit are installed at different heights of the frame and are staggered in the longitudinal and / or transverse directions.

[0021] In one embodiment, the electrolyte membrane unwinding unit is provided in two sets, and the two sets of electrolyte membrane unwinding units are respectively located on the upper and lower sides of the electrode unwinding mechanism; one electrolyte unwinding unit is located on the upper transport path on the frame, the electrode unwinding unit is located on the middle transport path, and the other electrolyte membrane unwinding unit is located on the lower transport path.

[0022] The upper, middle, and lower transmission paths each include a starting end and an output end, and the electrode and electrolyte membrane are transmitted from the starting end to the output end along a predetermined path; the starting ends of the upper, middle, and lower transmission paths are located on one side of the frame, and the output ends of the upper, middle, and lower transmission paths are located on the other side of the frame.

[0023] A second aspect of this application provides a composite electrode preparation system, including the unwinding device described in the first aspect above.

[0024] The technical solution provided in this application may include the following beneficial results:

[0025] The unwinding device of this application includes an electrolyte membrane unwinding unit for unwinding the electrolyte membrane roll and transmitting it to the target station at the same rate as the electrodes. This enables synchronous unwinding of the electrodes and the electrolyte membrane. By placing the unwinding transmission paths of the electrode unwinding unit and the electrolyte membrane unwinding unit at different heights of the frame and staggering them at least longitudinally and / or laterally, the device can save lateral and longitudinal installation space of the frame and optimize the overall spatial layout of the unwinding device.

[0026] Furthermore, in the technical solution of this application, in the upper electrolyte membrane unwinding unit, the middle electrode unwinding unit, and the lower electrolyte membrane unwinding unit, each unwinding roller, the first guide roller, the web guiding mechanism, the tape connecting platform, the second guide roller, the cleaning component, and the tension control mechanism are longitudinally staggered and laterally positioned at different locations along the corresponding transmission path. This saves horizontal and vertical installation space on the frame, enabling a high-density layout of each mechanism within the limited installation space of the frame.

[0027] Furthermore, in the technical solution of this application, the correction mechanism includes a correction sensing component and a correction execution component. The correction sensing component is used to sense the position information of the electrode and the electrolyte membrane, and the correction execution component is used to adjust the offset of the electrode and the electrolyte membrane during the transmission process according to the position information, thereby realizing that the electrode and the electrolyte membrane on both sides are in a centered state during the conveying process.

[0028] Furthermore, in the technical solution of this application, the tension control mechanism collects real-time data on the tension of the material belt during the feeding process of the electrode and electrolyte membrane and links it with the swing roller to achieve closed-loop control of the tension of the electrode and electrolyte membrane, thereby ensuring that the material belt of the electrode and electrolyte membrane is always taut and preventing wrinkling.

[0029] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0030] The above and other objects, features and advantages of this application will become more apparent from the more detailed description of exemplary embodiments thereof in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments thereof.

[0031] Figure 1 This is a schematic diagram of the unwinding device shown in the embodiments of this application;

[0032] Figure 2 This is a schematic diagram illustrating the cooperation between the correction mechanism and the tape-connecting platform of the unwinding device in an embodiment of this application;

[0033] Figure 3 This is a schematic diagram of the cleaning component of the unwinding device shown in the embodiments of this application;

[0034] Figure 4 This is a schematic diagram of the tension control mechanism of the unwinding device shown in the embodiments of this application.

[0035] Reference numerals: 100, frame; 101, electrolyte membrane; 102, electrode; 110, unwinding roller; 120, web guiding mechanism; 1201, first guide roller; 130, tape receiving platform; 131, base; 132, fixing part; 133, tape receiving operation part; 1301, second guide roller; 140, cleaning assembly; 141, brush; 142, iron removal assembly;

[0036] 1401, Third guide roller; 150, Tension control mechanism; 151, Guide roller; 152, Swing arm; 1521, Rotating shaft; 1522, Swing roller; 153, Tension sensor. Detailed Implementation

[0037] Embodiments of this application will now be described in more detail with reference to the accompanying drawings. While embodiments of this application are shown in the drawings, it should be understood that this application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make this application more thorough and complete, and to fully convey the scope of this application to those skilled in the art.

[0038] It should be understood that although the terms "first," "second," "third," etc., may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0039] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0040] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0041] Due to differences in the conveyor belt speeds of electrodes and electrolyte membranes in related technologies, quality problems can easily occur during the composite process. Furthermore, the assembly methods of various mechanisms have defects, resulting in poor utilization of installation space. To address these issues, this application provides an unwinding device and a composite electrode preparation system. This unwinding device not only enables simultaneous unwinding of the electrodes and electrolyte membranes in the composite electrode preparation process but also saves horizontal and vertical installation space, optimizing the overall spatial layout of the unwinding device.

[0042] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings.

[0043] Figure 1 This is a schematic diagram of the unwinding device shown in the embodiments of this application.

[0044] See Figure 1 This application provides an unwinding device, which includes a frame 100 and electrode unwinding unit B and electrolyte membrane unwinding units A1 and A2 mounted on the frame 100. Electrode unwinding unit B is used to unwind the roll of electrode 102 and transport it to the target station at a set speed. Electrolyte membrane unwinding units A1 and A2 are used to unwind the roll of electrolyte membrane 101 and transport it to the target station at the same speed as electrode 102. The electrode unwinding unit A1 and electrolyte membrane unwinding units A1 and A2 are located on the same vertical plane on the frame 100 (e.g., along the same vertical plane). Figure 1 The electrode unwinding unit A and the electrolyte membrane unwinding units A1 and A2 are arranged in the XY plane. The unwinding transport paths of the electrode unwinding unit A and the electrolyte membrane unwinding units A1 and A2 are different in shape, and the unwinding transport paths of the electrode unwinding unit A and the electrolyte membrane unwinding units A1 and A2 are located at different heights of the frame 100, and are staggered at least along the longitudinal Y and / or transverse X.

[0045] In this application, the electrode can be a current collector, such as copper foil or aluminum foil, and the solid electrolyte is transferred to the surface of the current collector using a preparation device. In other embodiments, the electrode can also be an electrode sheet with an active material layer coated on the surface of the current collector, and the solid electrolyte is transferred to the surface of the active material layer of the electrode sheet using a preparation device. The solution in this application is to transfer the solid electrolyte to the surface of the current collector as an example.

[0046] The electrolyte membrane includes a base membrane and a solid electrolyte attached to the base membrane, with the side containing the solid electrolyte facing the current collector. After rolling by the rolling unit, the solid electrolyte layer on the electrolyte membrane combines with the current collector to form a composite electrode. In this embodiment, the electrolyte membrane unwinding unit is provided with two sets (A1 and A2, respectively). The two sets of electrolyte membrane unwinding units A1 and A2 are located on both sides of the longitudinal direction Y of the electrode unwinding mechanism. The upper electrolyte membrane unwinding unit A1 can be used to release the electrolyte membrane 101 on the upper side of the electrode, and the lower electrolyte membrane unwinding unit A2 is used to release the electrolyte membrane 101 on the lower side of the electrode. This allows the upper electrolyte membrane 101, the electrode 102, and the lower electrolyte membrane 101 to be transported in layers along a predetermined trajectory in the longitudinal direction to the target station. The target station can be the next target station for producing the composite electrode. In this embodiment, the target station can be a preheating device or a rolling device in the composite electrode preparation system. The preheating device is used to preheat the electrode and the electrolyte membrane, and the rolling device is used to roll the electrode and the electrolyte membrane into a composite electrode.

[0047] The unwinding device of this application is used for the preparation of composite electrode sheets for solid-state batteries. The composite electrode sheet is formed by rolling electrodes and electrolyte membranes. The electrolyte membrane unwinding unit is used to unwind the roll of electrolyte membrane 101 and transfer it to the target station at the same speed as the electrode 102. It can realize the synchronous unwinding of the electrode 102 and the electrolyte membrane 101. The unwinding and transfer paths of the electrode unwinding unit A and the electrolyte membrane unwinding units A1 and A2 are located at different heights of the frame 100 and are arranged at least in the longitudinal and / or transverse directions. This can save the transverse and longitudinal installation space of the frame 100 and optimize the overall space layout of the unwinding device.

[0048] See Figure 1 In this embodiment, the electrode unwinding unit A and the electrolyte membrane unwinding units A1 and A2 each include an electrode unwinding roller 110b and electrolyte membrane unwinding rollers 110a and 110c, which are used to carry the rolls of electrode 102 and electrolyte membrane 101, and to unwind the rolls of electrode 102 and electrolyte membrane 101, respectively; the correction mechanism 120 is used to correct the position of electrode 102 and electrolyte membrane 101 during transmission, so that the transmission direction of electrode 102 and electrolyte membrane 101 is along a predetermined trajectory; the tension control mechanism 150 is used to control the tension of electrode 102 and electrolyte membrane 101 during transmission within a set range.

[0049] The electrode unwinding roller 110b and electrolyte membrane unwinding rollers 110a and 110c are fixed to the frame 100 at both ends by bearing seats and are driven by servo motors. The roll of electrode 102 is mounted on the electrode unwinding roller 110b. When the electrode unwinding roller 110b rotates, the electrode 102 can be unwound. The roll of electrolyte membrane 101 is mounted on the electrolyte membrane unwinding rollers 110a and 110c. When the electrolyte membrane unwinding rollers 110a and 110c rotate, the upper and lower electrolyte membranes 101 can be unwound. The rotation speed of the electrode unwinding roller 110b and the electrolyte membrane unwinding rollers 110a and 110c can be controlled by the servo motors to ensure that the feed rates of the electrode 102, the upper electrolyte membrane 101, and the lower electrolyte membrane 101 are the same. In related technologies, if the electrode roll is unwound too quickly while the electrolyte membrane 101 lags behind, the electrode layer may develop microcracks due to excessive stretching. Conversely, if the electrode roll is unwound too slowly, it may wrinkle or tear due to accumulation. The solution in this application, on the one hand, makes the interlayer tension distribution of the three types of rolls (electrode and two electrolyte membranes) more uniform, maintaining the tension stability of the electrode 102, the upper electrolyte membrane 101, and the lower electrolyte membrane 101 during the conveyor belt process, avoiding damage to the materials due to excessive or insufficient tension. On the other hand, it can ensure the structural consistency of the composite electrode sheet formed in subsequent processes. If the target process is a hot-press bonding process, the synchronized speed can ensure that each layer is uniformly stressed under high temperature and high pressure, reducing the interface resistance.

[0050] In some embodiments, the correction mechanism 120 includes a correction sensing component and a correction execution component. The correction sensing component is used to sense the position information of the electrode 102 and the electrolyte membrane 101, and the correction execution component is used to adjust the offset of the electrode 102 and the electrolyte membrane 101 during the transmission process according to the position information, so as to realize that the electrode 102 and the electrolyte membranes 101 on both sides are in a centered state during the conveyor belt process.

[0051] See Figure 4 In some embodiments, the tension control mechanism 150 includes a tension sensor 153, a tension controller, a moving roller assembly, and a guide roller. The moving roller assembly is disposed between the guide roller 151 and the tension sensor 153. The moving roller assembly can be a swing roller assembly that can move perpendicular to the belt feeding direction of the electrode 102. The swing roller assembly includes a swing arm 152 and a roller 1522 disposed at the end of the swing arm. The swing arm 152 swings around a set rotating shaft 1521. The swing plane is perpendicular to the plane of the material belt. When the swing arm 152 swings, the roller can drive the material belt to shift longitudinally, thereby controlling the tightness of the material belt to achieve tension adjustment.

[0052] The tension sensor 153 and the swing roller 152 are electrically connected to the tension controller. The tension controller receives the tension information of the electrode 102 and the electrolyte membrane 101 detected by the tension sensor 153, and controls the swing roller 152 to adjust the tension of the electrode 102 and the electrolyte membrane 101 to a predetermined range value based on the tension information. During the belt feeding process, the tension data is collected in real time and linked with the swing roller 152 assembly to realize closed-loop control of tension, so that the belt is always in a taut state and prevents wrinkling.

[0053] In some embodiments, the tension control mechanism 150 can be linked with the electrode unwinding roller 110b and the electrolyte membrane unwinding rollers 110a and 110c. The controller can control the operation of the tension control mechanism and the electrode unwinding roller 110b and / or the electrolyte membrane unwinding rollers 110a and 110c according to the real-time monitored tension value.

[0054] In some embodiments, the tension control mechanism controls the tension range to be 100-150N. When the tension of the electrode and electrolyte membrane strip exceeds this tension range (e.g., greater than 150N), the tension is reduced by controlling the swing roller to swing towards the strip to reduce the strip tightness, or by controlling the speed of the unwinding roller to increase the speed of unwinding. When the tension of the strip is less than this tension range (e.g., less than 100N), the swing roller is controlled to swing away from the strip to increase the strip tightness, or the speed of the unwinding roller is controlled to decrease to slow down the unwinding, until the tension is within the 100-150N range.

[0055] In some embodiments, the unwinding device of this application further includes a tape-receiving platform 130. The tape-receiving platform 130 includes a base 131 and two fixing parts 132 disposed on the base 131. The two fixing parts 132 are spaced apart in the transmission direction of the electrode 102 and the electrolyte membrane 101, and a tape-receiving operation part 133 is provided in the spaced-apart area. The fixing parts 132 can be pressing or clamping parts. During the tape-receiving process, the two fixing parts can press or clamp the parts of the new and old electrodes 102 near both ends to prevent displacement or wrinkling during the tape-receiving process, thereby realizing more convenient tape-receiving at the tape-receiving operation part 133. The operation part can be provided with welding parts to weld the new and old electrodes 102 near both ends. This not only reduces the scrap of electrode 102 tail material, but also enables quick roll change and tape receiving, reducing production line downtime.

[0056] See Figure 3In some embodiments, the unwinding device of this application further includes a cleaning component 140. The cleaning component 140 includes brushes 141 for contacting the outer surfaces of both sides of the electrode 102 and the electrolyte membrane 101. The brushes 141 are used to remove impurities adhering to the surface of the electrode 102 or the electrolyte membrane 101 during transmission. The brushes 141 may include a roller body with bristles implanted on its surface. A servo motor drives the roller body to rotate in the opposite direction to the transmission direction of the electrode 102 or the electrolyte membrane 101, thereby removing dust particles or electrolyte residues and other impurities adhering to the surface of the electrode 102 or the electrolyte membrane 101 through the bristles.

[0057] In some embodiments, the cleaning assembly 140 further includes an iron removal assembly 142, which and the brush assembly 141 are arranged side by side in the longitudinal direction. The iron removal assembly 142 is used to remove ferromagnetic impurities from the surface of the electrode and the electrolyte membrane. After passing through the iron removal assembly 142, the electrode or electrolyte membrane enters the brush assembly for dust removal.

[0058] See Figure 1 In some embodiments, the unwinding device further includes a first guide roller 1201, which guides the electrode 102 released by the electrode unwinding roller 110 to be transmitted along the horizontal direction X to the correction mechanism 120. The correction mechanism 120 is located on the input side of the tape receiving platform 130 and is adjacent to the tape receiving platform 130. After the electrode 102 is released from the unwinding roller 110b, it is guided by the first guide roller 1201 to turn to the horizontal direction X. The correction mechanism 120 detects the lateral (width direction of the material strip) offset of the electrode 102 in real time. When the offset is greater than the set value, the servo motor is triggered to move the correction roller to compensate for the position of the electrode 102 or the electrolyte membrane 101. After correction, the electrode 102 directly enters the horizontally set receiving platform 130. The horizontally set receiving platform 130 not only facilitates the operation of the workers to carry out the receiving operation, but also forms a straight transmission path with the upstream first guide roller 1201, reducing the space occupied by the equipment, and reducing the risk of deviation of the electrolyte membrane 101 and the electrode 102 during the belt feeding process.

[0059] In some embodiments, the electrode unwinding roller 110b and the electrolyte membrane unwinding rollers 110a and 110c are equipped with roll diameter detection components, which can detect the diameter data of the roll. As the diameter of the electrode unwinding roller 110b and the electrolyte membrane unwinding rollers 110a and 110c decreases, the ratio of the linear velocity to the angular velocity of the roll changes, resulting in tension fluctuations. Roll diameter detection, by providing real-time feedback of diameter data, enables the control system to dynamically adjust the torque of the unwinding motor to maintain constant tension and avoid strip breakage or wrinkles. Additionally, it can provide roll change warnings by estimating the remaining material length through the diameter-decreasing rate, reducing downtime.

[0060] See Figure 1In some embodiments, the unwinding device further includes a second guide roller 1301, which is located on the output side of the receiving platform 130. The second guide roller 1301 guides the electrolyte membrane 101 output from the receiving platform 130 to be transferred vertically in the Y direction to the cleaning assembly 140, which is located downstream of the second guide roller 1301. In some embodiments, the second guide roller 1301 guides the electrode 102 or electrolyte membrane 101 to be transferred vertically in the Y direction to the tension control mechanism 150, which is located downstream of the second guide roller 1301. The electrode 102 or electrolyte membrane 101 output from the receiving platform 130 is turned 90° by the second guide roller 1301 and enters the cleaning assembly 140 in the vertical Y direction.

[0061] In this embodiment, the cleaning component 140 includes two rotatable brushes 141. The axis of rotation of the brushes 141 is parallel to the surface of the electrode 102. The transmission channel between the two brushes 141 is set in the vertical direction Y. The electrolyte membrane 101 or the electrode 102 is transmitted upward along the vertical direction Y through the transmission channel between the two brushes 141. When the electrolyte membrane 101 or the electrode 102 is transmitted vertically, the dust and debris that the brushes 141 clean during the transmission process fall directly downward under the action of gravity, avoiding the retention or secondary adhesion of impurities during horizontal transmission.

[0062] In this embodiment, the electrode 102 is guided to the vertical direction Y by the second guide roller 1301 and enters the cleaning component, which is conducive to the effective use of space and process integration of the frame 100. The vertical channel of the cleaning component saves horizontal space, and a high-density layout of each mechanism can be achieved in the production line of the multilayer composite electrode 102 of this application.

[0063] See also Figure 1 In some embodiments, the unwinding device further includes a third guide roller 1401. In the electrode unwinding unit B and the lower electrolyte membrane unwinding unit A2, the third guide roller 1401 is located downstream of the cleaning component 140 and is used to lead the electrode 102 and electrolyte membrane 101 output by the cleaning component 140 out of the unwinding device to the target station.

[0064] Alternatively, the third guide roller 1401 is located downstream of the tension control mechanism 150 to guide the electrolyte membrane 101 output by the tension control mechanism 150 out of the unwinding device to the target station. After the electrode 102 and the electrolyte membrane 101 are cleaned by the cleaning assembly 140 or after tension control, they are drawn out from the unwinding device by one or two third guide rollers 1401, for example, to the preheating device of the composite electrode 102 preparation system.

[0065] See also Figure 1In this embodiment, the correction mechanism 120, the tape-connecting platform 130, the cleaning component 140, and the tension control mechanism 150 in the electrode unwinding unit B and the electrolyte membrane unwinding units A1 and A2 are installed at different heights of the frame 100 and are staggered in the longitudinal and / or transverse directions.

[0066] The frame 100 has a rectangular structure. The electrode unwinding unit and two electrolyte membrane unwinding units are arranged along the same vertical plane on the frame 100. One electrolyte unwinding unit A1 is located on the upper transport path, the electrode unwinding unit B is located on the middle transport path, and the other electrolyte membrane unwinding unit A2 is located on the lower transport path. The upper, middle, and lower transport paths each include a starting end and an output end. The electrode 102 and the electrolyte membrane 101 are transported from the starting end to the output end along a predetermined path. The starting ends of the upper, middle, and lower transport paths are located on one side of the frame 100, and the output ends of the upper, middle, and lower transport paths are located on the other side of the frame 100.

[0067] In this application, in the upper electrolyte membrane unwinding unit A1, the middle electrode unwinding unit B, and the lower electrolyte membrane unwinding unit A2, each unwinding roller 110, first guide roller 1201, correction mechanism 120, tape receiving platform 130, second guide roller 1301, cleaning component 140, and tension control mechanism 150 are staggered in the longitudinal direction Y and are respectively located at different positions on the corresponding transmission path in the transverse direction X. This can save the transverse and longitudinal installation space of the frame 100 and achieve a high-density layout of each mechanism within the limited installation space of the electrode frame.

[0068] In some specific embodiments, the electrode unwinding roller 110b and the electrolyte membrane unwinding rollers 110a and 110c on both sides are located at the starting end and at least partially overlap in projection in the longitudinal direction. The first guide roller 1201, the second guide roller 1301, the third guide roller 1401, the correction mechanism 120, the tape receiving platform 130, the cleaning component 140 and the tension control mechanism 150 are respectively provided in three sets, which correspond to the upper electrolyte membrane unwinding unit A1, the middle electrode unwinding unit B and the lower electrolyte membrane unwinding unit A2.

[0069] Downstream of the three unwinding rollers 110, a first guide roller 1201, a correction mechanism 120, and a receiving platform 130 are sequentially arranged. The first guide roller 1201, correction mechanism 120, receiving platform 130, and second guide roller 1301 are located near the bottom of the output side of each unwinding roller 110. These components can be arranged laterally. The electrode 102 or electrolyte membrane 101 is guided by the first guide roller 1201 and enters the correction mechanism 120. After being output by the correction mechanism 120, the electrode 102 enters the receiving platform 130. The electrode 102 output from the receiving platform 130 is guided by the second guide roller 1301 and enters the cleaning assembly 140 or the tension control mechanism 150. In this application, the cleaning assembly 140 and the tension control mechanism 150 are located downstream of the receiving platform 130, and their positions can be interchanged.

[0070] In some embodiments, a color mark detection component is also provided in the electrode unwinding unit B and the electrolyte membrane unwinding units A1 and A2. The color mark detection component accurately identifies the color marks on the surface of the electrode 102 and the electrolyte membrane 101 through a sensor, which can effectively prevent defects in the previous process or mechanism from being transmitted to this structure or process.

[0071] In some specific embodiments, in the upper electrolyte membrane unwinding unit A1, the second guide roller 1301 vertically and upwardly introduces the electrolyte membrane 101, which is horizontally output from the receiving platform 130, into the cleaning assembly 140. The tension control mechanism 150 is located on the output side of the cleaning assembly 140, and the electrolyte membrane 101 is output to the target station after passing through the tension control mechanism 150.

[0072] In the electrode unwinding unit B of the middle layer, the second guide roller 1301 vertically and upwardly introduces the electrode 102, which is horizontally output from the tape receiving platform 130, into the tension control mechanism 150. The tension control mechanism 150 is located on the output side of the tape receiving platform 130 and on the input side of the cleaning component 140. After passing through the tension control mechanism 150, the electrode 102 is vertically and upwardly introduced into the cleaning component 140 via the third guide roller 1401. After passing through the cleaning component 140, the electrode 102 is output to the target station.

[0073] In the lower electrolyte membrane unwinding unit A2, the second guide roller 1301 vertically guides the electrolyte membrane 101, which is horizontally output from the tape receiving platform 130, into the tension control mechanism 150. The tension control mechanism 150 is located on the output side of the tape receiving platform 130 and on the input side of the cleaning component 140. After passing through the tension control mechanism 150, the electrolyte membrane 101 is vertically guided upward through the third guide roller 1401 into the cleaning component 140. After passing through the cleaning component 140, the electrolyte membrane 101 is output to the target station.

[0074] The above describes the unwinding device of this application. Accordingly, this application also provides a composite electrode preparation system, which includes the unwinding device as described in the above embodiment. The composite electrode preparation system has a preheating station, a rolling station, a film tearing station and a winding station downstream of the unwinding device, which can improve the production efficiency of composite electrodes for solid-state batteries and optimize the spatial layout.

[0075] The solution of this application has been described in detail above with reference to the accompanying drawings. In the above embodiments, the descriptions of each embodiment have different focuses; for parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments. Those skilled in the art should also understand that the actions and modules involved in the specification are not necessarily essential to this application. Furthermore, it is understood that the steps in the method of this application embodiment can be adjusted, combined, and deleted according to actual needs, and the modules in the device of this application embodiment can be combined, divided, and deleted according to actual needs.

[0076] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. An unwinding device, characterized in that, include: The machine frame and the electrode unwinding unit and the electrolyte membrane unwinding unit installed on the machine frame, the electrode unwinding unit is used to unwind the electrode roll and transport it to the target station at a set speed, and the electrolyte membrane unwinding unit is used to unwind the electrolyte membrane roll and transport it to the target station at the same speed as the electrode. The electrode unwinding unit and the electrolyte membrane unwinding unit are arranged longitudinally on the frame, and the unwinding transport paths of the electrode unwinding unit and the electrolyte membrane unwinding unit are different in shape; the unwinding transport paths of the electrode unwinding unit and the electrolyte membrane unwinding unit are located at different heights on the frame, and are staggered at least longitudinally and / or laterally.

2. The unwinding device according to claim 1, characterized in that, The electrode unwinding unit and the electrolyte membrane unwinding unit include at least: Electrode unwinding roller and electrolyte membrane unwinding roller are used to carry the rolls of electrode and electrolyte membrane respectively, and to unwind the rolls of electrode and electrolyte membrane at the same rate; The alignment mechanism is used to align the position of the electrode and the electrolyte membrane so that the transmission direction of the electrode and the electrolyte membrane after unfolding is along a predetermined trajectory.

3. The unwinding device according to claim 2, characterized in that, The electrode unwinding unit and the electrolyte membrane unwinding unit further include: A tape-connecting platform, comprising a base and two fixing portions disposed on the base, the two fixing portions being spaced apart in the transmission direction of the electrode and the electrolyte membrane, with tape-connecting operation portions provided in the spaced-apart areas; and / or, A cleaning assembly, comprising a brush component and / or an iron removal component for contacting the outer surfaces of both sides of the electrode and the electrolyte membrane, wherein the brush component is used to remove dust and impurities adhering to the surface of the electrode or electrolyte membrane during transport, and the iron removal component is used to remove iron impurities adhering to the surface of the electrode or electrolyte membrane; and / or, A tension control mechanism is used to control the tension of the electrode and the electrolyte membrane during transmission within a set range.

4. The unwinding device according to claim 3, characterized in that, Also includes: The first guide roller is used to guide the electrode released by the electrode unwinding roller to be transmitted horizontally to the correction mechanism. The correction mechanism is located on the input side of the tape receiving platform and is arranged adjacent to the tape receiving platform.

5. The unwinding device according to claim 3, characterized in that, Also includes: A second guide roller is disposed on the output side of the tape receiving platform. The second guide roller is used to guide the electrolyte membrane output from the tape receiving platform to be transferred vertically to the cleaning component, the cleaning component being located at an adjacent position downstream of the second guide roller; and / or, the second guide roller is used to guide the electrode or the electrolyte membrane to be transferred vertically to the tension control mechanism, wherein the tension control mechanism is located at an adjacent position downstream of the second guide roller.

6. The unwinding device according to claim 3, characterized in that, Also includes: The third guide roller, located downstream of the cleaning component, is used to lead the electrodes and electrolyte membrane output by the cleaning component to the target station. And / or, the third guide roller is located downstream of the tension control mechanism and is used to lead the electrolyte membrane output by the tension control mechanism to the target station.

7. The unwinding device according to claim 3, characterized in that: The correction mechanism includes a correction sensing component and a correction execution component. The correction sensing component is used to sense the position information of the electrode and the electrolyte membrane, and the correction execution component is used to adjust the offset of the electrode or the electrolyte membrane during the transmission process according to the position information. The tension control mechanism includes a tension sensor, a tension controller, and a moving roller assembly, wherein the tension sensor and the moving roller assembly are electrically connected to the tension controller. The tension controller is used to receive tension information of the electrode or the electrolyte membrane detected by the tension sensor, and control the moving roller assembly to adjust the tension of the electrode or the electrolyte membrane to a predetermined value based on the tension information.

8. The unwinding device according to claim 3, characterized in that: The correction mechanism, the tape-connecting platform, the cleaning component, and the tension control mechanism in the electrode unwinding unit and the electrolyte membrane unwinding unit are installed at different heights on the frame and are staggered in the longitudinal and / or transverse directions.

9. The unwinding device according to claim 8, characterized in that: The electrolyte membrane unwinding unit is provided in two sets, and the two sets of electrolyte membrane unwinding units are located on the upper and lower sides of the electrode unwinding mechanism, respectively; one of the electrolyte membrane unwinding units is located on the upper transport path on the frame, the electrode unwinding unit is located on the middle transport path, and the other electrolyte membrane unwinding unit is located on the lower transport path. The upper, middle, and lower transmission paths each include a starting end and an output end, and the electrode and electrolyte membrane are transmitted from the starting end to the output end along their respective predetermined paths; the starting ends of the upper, middle, and lower transmission paths are located on one side of the frame, and the output ends of the upper, middle, and lower transmission paths are located on the other side of the frame.

10. A composite electrode preparation system, characterized in that, Includes the unwinding device as described in any one of claims 1-9.

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