Single-side coating device

Abstract

The utility model provides a single-side coating device and relates to the technical field of coating equipment. The single-face coating device comprises a rack, a supporting mechanism, a driving mechanism, a coating die head, a first camera, a second camera and a drying oven, wherein the supporting mechanism, the driving mechanism, the coating die head, the first camera, the second camera and the drying oven are arranged on the rack; the driving mechanism is used for driving the substrate to move; the first camera is located on the downstream of the coating die head in the moving direction of the base material, the coating die head is used for coating the surface, opposite to the coating die head, of the base material, and the first camera is used for collecting an image of the surface, opposite to the coating die head, of the base material; the second camera is used for collecting an image of the surface, opposite to the coating die head, of the base material; and the drying oven is used for drying the coated base material. According to the single-side coating device provided by the utility model, the first camera and the second camera can respectively collect the images of the two surfaces of the base material, so that whether coating films on the two surfaces of the base material are aligned or not can be judged according to the images of the two surfaces, and the comprehensiveness of coating defect detection is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of coating equipment, in particular to a single-sided coating device. Background Art

[0002] In the production process of lithium batteries, battery pole piece coating is an important link. Battery pole piece coating refers to coating the slurry on the surface of substrates such as copper foil or aluminum foil and drying it in an oven. The quality of battery pole piece coating is of great significance to the capacity, consistency, safety, etc. of the battery. After the coating is completed, the coating defects need to be detected to ensure the yield rate of the finished battery. Among them, the coating defect detection of the pole piece usually includes the detection of the pole piece in the wet film state and the detection of the pole piece after being dried in an oven. The existing single-sided coating device includes a coating die, a wet film detection camera, an oven, and a dry film detection camera. The wet film detection camera and the dry film detection camera are both used to collect images of the substrate surface opposite to the coating die. When using a single-sided coating device to make battery pole pieces, two operations are required. The first operation makes the first side of the substrate face the coating die head, and the second operation makes the second side of the substrate face the coating die head, so that the coating die head coats the first side and the second side of the substrate respectively. The wet film detection camera and the dry film detection camera respectively collect images of the same side of the substrate after coating by the coating die head in the wet film state and after drying in an oven, so as to determine whether there are defects such as wrinkles, bubbles or leakage in the coating. However, the single-sided battery pole piece coating device of the prior art cannot detect whether the coating films on the two sides of the substrate are aligned, so there is a problem that the coating defects cannot be fully detected. Utility Model Content

[0003] The utility model aims to provide a single-sided coating device which can comprehensively detect coating defects.

[0004] The embodiment of the utility model is achieved as follows:

[0005] The utility model provides a single-sided coating device, which comprises a frame and a supporting mechanism, a driving mechanism, a coating die head, a first camera, a second camera and an oven arranged on the frame, wherein the supporting mechanism is used for supporting a substrate; the driving mechanism is used for driving the substrate to move; the coating die head and the first camera are located on a first side of a moving path of the substrate, and along the moving direction of the substrate, the first camera is located downstream of the coating die head, the coating die head is used for coating a surface of the substrate opposite to the coating die head, and the first camera is used for collecting an image of the surface of the substrate opposite to the coating die head; the second camera is located on a second side of the moving path of the substrate, and the second camera is used for collecting an image of the surface of the substrate opposite to the coating die head; the oven is used for drying the coated substrate.

[0006] In an optional embodiment, the second camera, the coating die head, the first camera and the oven are arranged in sequence along the moving path of the substrate.

[0007] In an optional embodiment, the supporting mechanism includes a first supporting member and a second supporting member both mounted on a frame, the first supporting member being opposite to and spaced apart from the first camera, and the first supporting member being used to support the substrate; the second supporting member being opposite to and spaced apart from the second camera, and the second supporting member being used to support the substrate.

[0008] In an optional embodiment, the first support member includes a first support roller and two first bearings, the second support member includes a second support roller and two second bearings, the inner rings of the two first bearings are respectively fixedly sleeved on both ends of the first support roller, the outer rings of the two first bearings are both fixedly connected to the frame, the inner rings of the two second bearings are respectively fixedly sleeved on both ends of the second support roller, and the outer rings of the two second bearings are both fixedly connected to the frame.

[0009] In an optional embodiment, the supporting mechanism includes a coating roller assembly, which includes a coating roller, which is rotatably mounted on a frame, and the coating roller is opposite to and spaced from a coating die head; the driving mechanism includes a motor, which is transmission-connected to the coating roller and is used to drive the coating roller to rotate, and drive the substrate to move when the coating roller rotates.

[0010] In an optional embodiment, the supporting mechanism includes an encoding roller, which is rotatably mounted on a frame, and the encoding roller is used to support the substrate and can rotate around its own axis as the substrate moves; the single-sided coating device also includes an encoder, which is mounted on one end of the encoding roller and is used to detect the rotation angle of the encoding roller.

[0011] In an optional embodiment, the supporting mechanism includes a tension detection roller, which is installed on a frame and is used to support the substrate; the single-sided coating device also includes a tension detection mechanism, which includes a pressure sensor connected to one end of the tension detection roller, and the pressure sensor is used to detect the tension of the substrate supported by the tension detection roller.

[0012] In an optional embodiment, the support mechanism further includes a tensioning roller which is adjustably connected to the frame and is used to support the substrate. The tension of the substrate can be adjusted by adjusting the position of the tensioning roller relative to the frame along the radial direction of the tensioning roller.

[0013] In an optional embodiment, the single-sided coating device further comprises a belt-joining mechanism, which is used to connect the substrate broken into two sections, and the belt-joining mechanism comprises a pressing assembly, which is used to press the broken substrate.

[0014] In an optional embodiment, the clamping assembly includes a support frame, a cylinder and a clamping piece, the support frame is connected to the frame, the cylinder is installed on the support frame, the clamping piece is connected to the cylinder, and the clamping piece is used to move under the drive of the cylinder and clamp the substrate between the clamping piece and the support frame to the support frame.

[0015] The single-sided coating device provided by the embodiment of the utility model has at least the following advantages or beneficial effects:

[0016] The single-sided coating device provided in an embodiment of the utility model includes a frame and a supporting mechanism, a driving mechanism, a coating die, a first camera, a second camera and an oven arranged on the frame, the supporting mechanism is used to support the substrate; the driving mechanism is used to drive the substrate to move; the coating die and the first camera are located on the first side of the moving path of the substrate, and along the moving direction of the substrate, the first camera is located downstream of the coating die, the coating die is used to coat the surface of the substrate opposite to the coating die, and the first camera is used to capture the image of the surface of the substrate opposite to the coating die; the second camera is located on the second side of the moving path of the substrate, and the second camera is used to capture the image of the surface of the substrate opposite to the coating die; the oven is used to dry the coated substrate. The single-sided coating device provided by the embodiment of the utility model firstly coats the first surface of the substrate in the first operation, so that the first surface of the substrate is opposite to the coating die head and the first camera, the coating die head coats the first surface of the substrate, and the first camera collects the image of the first surface of the substrate after coating; the second operation coats the second surface of the substrate, so that the first surface of the substrate after the first surface coating and oven drying is opposite to the second camera, and the second surface of the substrate is opposite to the coating die head and the first camera, the second camera collects the image of the first surface of the substrate after oven drying, the coating die head coats the second surface of the substrate, and the first camera collects the image of the second surface of the substrate after coating. Such an arrangement enables the first camera and the second camera to respectively collect images of the two surfaces of the substrate during the second operation, so that it can be judged whether the coating films on the two surfaces of the substrate are aligned according to the images of the two surfaces. Therefore, the single-sided coating device provided by the embodiment of the utility model can fully detect coating defects. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A schematic diagram of the partial structure of a single-sided coating device provided in an embodiment of the utility model;

[0019] Figure 2 A schematic diagram of the structure of a single-sided coating device provided in an embodiment of the utility model;

[0020] Figure 3 for Figure 1 Magnified view at A in the middle;

[0021] Figure 4 A cross-sectional view of a tension detection mechanism of a single-sided coating device provided in an embodiment of the utility model;

[0022] Figure 5 A schematic structural diagram of a clamping assembly of a single-sided coating device provided in an embodiment of the utility model.

[0023] icon:

[0024] 10-single-sided coating device; 20-substrate; 100-frame; 110-side plate; 120-bottom plate; 130-second bearing seat; 140-second bearing; 200-support mechanism; 210-first support roller; 220-second support roller; 230-pass roller; 240-coating roller assembly; 241-coating roller; 242-pressing roller; 250-encoding roller; 260-tension detection roller; 270-tensioning roller; 280-unwinding roller; 290-winding roller; 300-coating die head; 400-first camera; 500-second camera; 600-oven; 700-tension detection mechanism; 710-pressure sensor; 720-connecting block; 800-belt connecting mechanism; 810-clamping assembly; 811-support frame; 812-cylinder; 813-cylinder body; 814-piston rod; 815-clamping piece; 816-frame; 817-clamping roller; 900-detection element. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0028] In the description of the present utility model, it should be noted that the terms "inside", "outside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "setting" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] Figure 1 This is a schematic diagram of the structure of a single-sided coating device 10 provided in an embodiment of the utility model. Figure 2 This is a partial structural diagram of a single-sided coating device 10 provided in an embodiment of the utility model. Figure 1 and Figure 2The present embodiment provides a single-sided coating device 10, which includes a frame 100 and a support mechanism 200, a driving mechanism, a coating die 300, a first camera 400, a second camera 500 and an oven 600 arranged on the frame 100, wherein the support mechanism 200 is used to support a substrate 20; the driving mechanism is used to drive the substrate 20 to move; the coating die 300 and the first camera 400 are located on a first side of a moving path of the substrate 20, and along the moving direction of the substrate 20, the first camera is located downstream of the coating die 300, the coating die 300 is used to coat a surface of the substrate 20 opposite to the coating die 300, and the first camera 400 is used to collect an image of the surface of the substrate 20 opposite to the coating die 300; the second camera 500 is located on a second side of the moving path of the substrate 20, and the second camera 500 is used to collect an image of the surface of the substrate 20 opposite to the coating die 300; the oven 600 is used to dry the coated substrate 20. Optionally, the support mechanism 200 includes a plurality of rollers 230 arranged at intervals along the moving path of the substrate 20, and the rollers 230 are used to support the substrate 20. Optionally, the substrate 20 moves along its length direction, and the first camera 400 and the second camera 500 are both linear array cameras extending along the width direction of the substrate 20.

[0031] In this embodiment, the single-sided coating device 10 is used to coat and detect defects in a battery electrode during the production process of a lithium battery. The substrate 20 is an aluminum foil or a copper foil. The slurry is coated on the aluminum foil to form the positive electrode of the battery, and the slurry is coated on the copper foil to form the negative electrode of the battery. In other embodiments, the single-sided coating device 10 can also be used to coat other substrates 20 such as cloth. This embodiment is not limited.

[0032] The single-sided coating device 10 provided in this embodiment first coats the first surface of the substrate 20 in the first operation, so that the first surface of the substrate 20 is opposite to the coating die 300 and the first camera 400, the coating die 300 coats the first surface of the substrate 20 to form a coating film, the first camera 400 collects the image of the first surface of the substrate 20 after coating, and the oven 600 dries the coated substrate 20; the second operation coats the second surface of the substrate 20, after the first surface coating and drying are completed, the second surface of the substrate 20 is opposite to the coating die 300 and the first camera 400, the first surface of the substrate 20 is opposite to the second camera 500, the driving mechanism drives the substrate to move, the second camera 500 collects the image of the first surface of the dried substrate 20, the coating die 300 coats the second surface of the substrate 20 to form a coating film, and the first camera 400 collects the image of the second surface of the substrate 20 after coating. This arrangement allows the first camera 400 and the second camera 500 to respectively capture images of the two surfaces of the substrate 20 during the second operation, so that it is possible to determine whether the coating films on the two surfaces of the substrate 20 are aligned based on the images of the two surfaces. If it is determined that the coating films on the two surfaces of the substrate 20 are not aligned, it is determined that there are defects in the coating, thereby ensuring the comprehensiveness of the coating defect detection.

[0033] Please continue to refer to Figure 2 In this embodiment, the second camera 500, the coating die head 300, the first camera 400 and the oven 600 are sequentially arranged along the moving path of the substrate 20. In this arrangement, during the first operation, the first camera 400 collects an image of the first surface of the substrate 20 in a wet film state after coating, and the substrate 20 enters the oven 600 for drying after passing through the first camera 400; during the second operation, the second camera 500 collects an image of the first surface of the substrate 20 dried by the oven 600, and the first camera 400 collects an image of the second surface of the substrate 20 in a wet film state after coating, and the substrate 20 enters the oven 600 for drying after passing through the first camera 400. In this arrangement, the first camera 400 can collect an image of the first surface in a wet film state and an image of the second surface in a wet film state, and can timely process coating abnormalities in a wet film state (such as uneven coating thickness), and the second camera 500 can collect an image of the first surface of the substrate 20 dried by the oven 600, thereby realizing the detection of wet film and dry film of the substrate 20.

[0034] In other embodiments of the present invention, the coating die head 300, the first camera 400, the second camera 500 and the oven 600 are sequentially arranged along the moving path of the substrate 20, or the coating die head 300, the oven 600, the first camera 400 and the second camera 500 are sequentially arranged along the moving path of the substrate 20. Such an arrangement can also achieve the purpose of determining whether the coating films on the two surfaces of the substrate 20 are aligned by respectively collecting images of the two surfaces of the substrate 20 by the first camera 400 and the second camera 500.

[0035] In this embodiment, the support mechanism 200 includes a first support member and a second support member both mounted on the frame 100, the first support member is opposite to the first camera 400 and is arranged at a distance, and the first support member is used to support the substrate 20; the second support member is opposite to the second camera 500 and is arranged at a distance, and the second support member is used to support the substrate 20. In this embodiment, the arrangement of the first support member and the second support member improves the stability of the substrate 20 when passing through the first camera 400 and the second camera 500, thereby ensuring the accuracy of the first camera 400 and the second camera 500 in capturing images.

[0036] Figure 3 for Figure 1 Magnified view of A in the figure. Alternatively, refer to Figure 1 and Figure 3The first support member includes a first support roller 210 and two first bearings, the second support member includes a second support roller 220 and two second bearings 140, the first support roller 210 is used to support the substrate 20 passing between the first support roller 210 and the first camera 400, the second support roller 220 is used to support the substrate 20 passing between the second support roller 220 and the second camera 500, the inner rings of the two first bearings are fixedly sleeved with the two ends of the first support roller 210, the outer rings of the two first bearings are fixedly connected to the frame 100, the inner rings of the two second bearings 140 are fixedly sleeved with the two ends of the second support roller 220, and the outer rings of the two second bearings 140 are fixedly connected to the frame 100. Such an arrangement improves the smoothness of the first support roller 210 and the second support roller 220 rotating around their own axes relative to the frame 100, reduces the resistance to the movement of the substrate 20, and the axes of the first support roller 210 and the second support roller 220 are fixed relative to the frame 100, which can ensure that the distance between the first support roller 210 and the first camera 400 is constant, and the distance between the second support roller 220 and the second camera 500 is constant, thereby making the distance between the substrate 20 passing between the first support roller 210 and the first camera 400 and the first camera 400 stable, and the distance between the substrate 20 passing between the second support roller 220 and the second camera 500 and the second camera 500 stable, thereby improving the accuracy of the first camera 400 and the second camera 500 in capturing images. In other embodiments of the utility model, the first support member is a first support plate, the first support plate has a first arc surface for supporting the substrate 20, and the second support member is a second support plate, the second support plate has a second arc surface for supporting the substrate 20.

[0037] Optionally, please continue to refer to Figure 1 and Figure 3 The frame 100 includes two side plates 110 that are opposite and spaced apart and a bottom plate 120 connected between the two side plates 110. The outer rings of the two first bearings 140 are fixedly connected to the two side plates 110, and the outer rings of the two second bearings are fixedly connected to the two side plates 110. Specifically, the frame 100 also includes two first bearing seats and two second bearing seats 130. The two first bearing seats are fixedly connected to the two side plates 110, and the two second bearing seats 130 are fixedly connected to the two side plates 110. The first bearing seat is provided with a first mounting hole, and the second bearing seat 130 is provided with a second mounting hole. The outer rings of the two first bearings are fixedly plugged with the first mounting holes of the two first bearing seats, and the outer rings of the two second bearings 140 are fixedly plugged with the second mounting holes of the two second bearing seats 130. Such an arrangement enables the outer rings of the two first bearings to be fixedly connected to the two side plates 110 via the two first bearing seats, and the outer rings of the two second bearings 140 to be fixedly connected to the two side plates 110 via the two second bearing seats 130, thereby improving the support stability of the first support roller 210 and the second support roller 220.

[0038] Please refer to Figure 2 In this embodiment, the support mechanism 200 includes a coating roller assembly 240, and the coating roller assembly 240 includes a coating roller 241, which is rotatably mounted on the frame 100, and the coating roller 241 is opposite to and spaced from the coating die head 300; the driving mechanism includes a motor, which is in transmission connection with the coating roller 241, and is used to drive the coating roller 241 to rotate, and when the coating roller 241 rotates, the substrate 20 is driven to move. Such an arrangement allows the coating area on the substrate 20 to be supported by the coating roller 241 when the substrate 20 passes through the coating die head 300, so that the relative position between the coating area on the substrate 20 and the coating die head 300 is stable, ensuring that the coating die head 300 can evenly coat the slurry on the substrate 20, and the coating roller 241 can drive the substrate 20 to move when it rotates under the drive of the motor, thereby improving the reliability of the movement of the substrate 20 when passing through the coating die head 300, and further improving the uniformity of the coating die head 300 coating the slurry on the substrate 20.

[0039] Optionally, the coating roller assembly 240 further includes a pressure roller 242, which is located upstream of the coating die 300 along the moving direction of the substrate 20, and the pressure roller 242 is tangentially matched with the coating roller 241, and is used to press the substrate 20 against the coating roller 241. The arrangement of the pressure roller 242 improves the friction between the coating roller 241 and the substrate 20 when the coating roller 241 rotates, and ensures the reliability of the motor driving the coating roller 241 to drive the substrate 20 to move. In addition, the pressure roller 242 is pressed against the coating roller 241, and the position reliability of the substrate 20 passing between the coating die 300 and the coating roller 241 relative to the coating die 300 is also improved, and the coating die 300 is ensured to apply the slurry to the substrate 20 uniformly. Specifically, the two ends of the coating roller 241 are supported by two side plates 110 respectively, and the two ends of the pressure roller 242 are supported by two side plates 110 respectively.

[0040] Optionally, the support mechanism 200 further includes an unwinding roller 280 and a winding roller 290 arranged at intervals along the moving direction of the substrate 20, and the unwinding roller 280 and the winding roller 290 are both used to support the rolled substrate 20; the driving mechanism further includes an unwinding motor and a winding motor, the unwinding motor is connected to the unwinding roller 280 in a transmission manner, and is used to drive the unwinding roller 280 to rotate so as to release the rolled substrate 20 supported by it, and the winding motor is connected to the winding roller 290 in a transmission manner, and is used to drive the winding roller 290 to rotate so as to wind the substrate 20 on the winding roller 290. Such an arrangement further improves the reliability of the movement of the substrate 20. In other embodiments of the utility model, only a winding motor may be provided, and when the winding motor drives the winding roller 290 to roll up the substrate 20, the movement of the substrate 20 drives the unwinding roller 280 to rotate and release the substrate 20.

[0041] Please refer to Figure 2In this embodiment, the support mechanism 200 includes an encoding roller 250, which is rotatably mounted on the frame 100. The encoding roller 250 is used to support the substrate 20 and can rotate around its own axis as the substrate 20 moves; the single-sided coating device 10 also includes an encoder, which is mounted on one end of the encoding roller 250 and is used to detect the rotation angle of the encoding roller 250. Specifically, the single-sided coating device 10 also includes a controller, which is in communication connection with the encoder, the first camera 400 and the second camera 500. The controller can calculate the rotation angle of the encoding roller 250 according to the signal output by the encoder, and then obtain the moving speed of the substrate 20 that drives the encoding roller 250 to rotate, so that the controller can control the first camera 400 and the second camera 500 to adjust the time interval of collecting images in real time according to the change of the moving speed of the substrate 20, thereby ensuring the quality of the images collected by the first camera 400 and the second camera 500. Specifically, the encoder includes a code disk and a sensing element, the code disk is coaxially fixedly connected with the encoding roller 250, and the sensing element cooperates with the code disk to output a signal when the code disk rotates with the encoding roller 250. In this embodiment, the encoder is a photoelectric encoder, and the sensing element is a photoelectric sensor. In other embodiments of the utility model, the encoder can also be a magnetoelectric encoder, and the sensing element is a magnetic sensing element.

[0042] Optionally, the single-sided coating device 10 further includes a detection element 900, which is in communication connection with the controller. Along the moving direction of the substrate 20, the detection element 900 is located between the coating die head 300 and the first camera 400. When the detection element 900 is opposite to the coating area on the substrate 20, the detection element 900 outputs a first detection signal, and when the detection element 900 is opposite to the non-coating area on the substrate 20, the detection element 900 outputs a second detection signal. Within the time interval when the signal output by the detection element 900 changes twice, the controller can obtain the moving distance of the substrate 20 within the time interval through the signal output by the encoder, and then obtain the length of the coating area on the substrate 20 along the moving direction of the substrate 20 (i.e., the coating length) or obtain the length of the non-coating area on the substrate 20 along the moving direction of the substrate 20 (i.e., the coating interval length). Optionally, the detection element 900 is a photoelectric sensor or an optical fiber sensor.

[0043] Figure 4 This is a cross-sectional view of the tension detection mechanism 700 of the single-sided coating device 10 provided in the embodiment of the present utility model. Figure 4In this embodiment, the support mechanism 200 includes a tension detection roller 260, which is installed on the frame 100 and used to support the substrate 20; the single-sided coating device 10 also includes a tension detection mechanism 700, which includes a tension detection roller 260 and a pressure sensor 710, which is connected to one end of the tension detection roller 260, and the pressure sensor 710 is used to detect the tension of the substrate 20 supported by the tension detection roller 260. Such a configuration allows the pressure of the substrate 20 acting on the tension detection roller 260 to be transmitted to the pressure sensor 710, and the controller can detect the tension of the substrate 20 in real time according to the output signal of the pressure sensor 710, and detect the abnormal situation in the movement of the substrate 20 in real time, for example, when the substrate 20 is disconnected, the pressure of the substrate 20 on the tension detection roller 260 will be significantly reduced, so that the abnormal situation can be handled in time, and in addition, the real-time detection of the tension of the substrate 20 can also fine-tune the tension of the substrate 20 in time to ensure that the tension is moderate, thereby ensuring the coating quality of the coating die 300. Optionally, the tension detection mechanism 700 further includes a connection block 720, which is sleeved on one end of the tension detection roller 260, and the connection block 720 is in surface contact with the pressure sensor 710. The connection block 720 is in surface contact with the pressure sensor 710, which improves the sensitivity of the pressure sensor 710 in detecting the tension of the substrate 20. Specifically, the first end of the tension detection roller 260 is rotatably connected to and supported by one of the two side plates 110, the pressure sensor 710 is fixedly connected to the other of the two side plates 110, the connection block 720 is located above the pressure sensor 710 and supported by the pressure sensor 710, and the connection block 720 is provided with a support hole, the aperture of the support hole is adapted to the outer diameter of the second end of the tension detection roller 260, and the second end of the tension detection roller 260 is rotatably inserted into the support hole.

[0044] In this embodiment, the support mechanism 200 further includes a tension roller 270, which is adjustably connected to the frame 100. The tension roller 270 is used to support the substrate 20. When the position of the tension roller 270 relative to the frame 100 is adjusted along the radial direction of the tension roller 270, the tension of the substrate 20 can be adjusted. This configuration allows the controller to adjust the tension of the substrate 20 by moving the tension roller 270 when judging that the tension of the substrate 20 is too large or too small according to the signal output by the pressure sensor 710, so that the tension of the substrate 20 is moderate, thereby improving the uniformity of the coating die 300 coating the slurry on the substrate 20. Optionally, the support mechanism 200 further includes a driving member, which is transmission-connected to the tension roller 270 and is used to drive the tension roller 270 to move relative to the frame 100 to adjust the tension of the substrate 20. Specifically, the driving member includes two driving cylinders, and the driving cylinders include driving piston rods. The two ends of the tension roller 270 are respectively connected to the driving piston rods of the two driving cylinders. When the driving piston rods move relative to the frame 100, the tension roller 270 is driven to move synchronously to adjust the tension of the substrate 20 supported by the tension roller 270. In other embodiments of the utility model, the support mechanism 200 includes a movable frame, a first end of the movable frame is pivotally connected to the side plate 110 through a pivot shaft, and the tension roller 270 is connected to the second end of the movable frame. The driving member is a motor, which is transmission-connected to the movable frame and is used to drive the movable frame to drive the tension roller 270 to rotate around the axis of the pivot shaft to adjust the tension of the substrate 20 supported by the tension roller 270.

[0045] Please refer to Figure 2 In this embodiment, the single-sided coating device 10 also includes a tape splicing mechanism 800, which is used to connect the substrate 20 broken into two sections. The tape splicing mechanism 800 includes a clamping assembly 810, which is used to press the broken substrate 20, so that when the substrate 20 is broken, the clamping assembly 810 can be used to press the broken substrate 20, which is convenient for the operator to use tape to bond the two sections of the substrate 20, saving manpower and improving the efficiency of tape splicing.

[0046] Optionally, the tape splicing mechanism 800 includes two pressing assemblies 810 arranged at intervals along the moving direction of the substrate 20 and a tape splicing platform located between the two pressing assemblies 810, the two pressing assemblies 810 are respectively used to press the two disconnected sections of the substrate 20, and the tape splicing platform is used to support the substrate 20. With such an arrangement, when the substrate 20 is disconnected, the two disconnected sections of the substrate 20 can be respectively pressed by the two pressing assemblies 810, and the disconnected portions of the two sections of the substrate 20 are supported by the tape splicing platform, so that when the operator uses the adhesive tape to bond the disconnected portions of the two ends of the substrate 20, the flatness of the interface of the two sections of the substrate 20 can be ensured, and the substrate 20 after bonding can be ensured to move smoothly.

[0047] Optionally, along the moving direction of the substrate 20, the belt splicing mechanism 800 is located between the coating die head 300 and the first camera 400. This arrangement allows the belt splicing mechanism 800 to be arranged close to the winding roller 290, so that the bonding part of the substrate 20 can be promptly wound up on the winding roller 290, preventing the bonding part of the substrate 20 from being disconnected again due to force during the movement, thereby reducing the maintenance frequency of the substrate 20 during the coating process. Of course, in other embodiments of the utility model, the belt splicing mechanism 800 can also be arranged between the second camera 500 and the coating film head 300 or the belt splicing mechanism 800 can be arranged between the first camera 400 and the oven 600. This embodiment is not limited.

[0048] Figure 5 This is a schematic diagram of the structure of the pressing assembly 810 of the single-sided coating device 10 provided in the embodiment of the utility model. Figure 5 In this embodiment, the pressing assembly 810 includes a support frame 811, a cylinder 812 and a pressing member 815. The support frame 811 is connected to the frame 100. The cylinder 812 is installed on the support frame 811. The pressing member 815 is connected to the cylinder 812. The pressing member 815 is used to move under the drive of the cylinder 812 and press the substrate 20 located between the pressing member 815 and the support frame 811 to the support frame 811. Optionally, the cylinder 812 includes a cylinder body 813 and a piston rod 814 movably connected to the cylinder body 813. The cylinder body 813 is fixedly connected to the support frame 811, and the pressing member 815 is fixedly connected to the piston rod 814. Such an arrangement enables the piston rod 814 to drive the pressing member 815 to move closer to or away from the support frame 811 when it moves relative to the cylinder body 813, so as to press the substrate 20 to the support frame 811 or release the substrate 20.

[0049] Optionally, the pressing assembly 810 includes two cylinders 812 arranged at intervals along the width direction of the substrate 20, the cylinder bodies 813 of the two cylinders 812 are both installed on the support frame 811, and the two ends of the pressing member 815 are respectively connected to the piston rods 814 of the two cylinders 812. Such an arrangement improves the synchronization of the movement of the two ends of the pressing member 815, so that the pressing member 815 can simultaneously press the two ends of the substrate 20 along its width direction to the support frame 811.

[0050] Optionally, the pressing member 815 includes a frame 816 and a pressing roller 817 fixedly mounted on the movable frame, the frame 816 is fixedly connected to the piston rod 814 of the cylinder 812, the axis of the pressing roller 242 extends along the width direction of the substrate 20, and when the piston rod 814 drives the frame 816 to move, the pressing roller 817 moves synchronously with the frame 816 to press the substrate 20 against the support frame 811. In other embodiments of the utility model, the pressing member 815 includes a pressing block, which is used to press the substrate 20 against the support frame 811.

[0051] In summary, the single-sided coating device 10 provided in the embodiment of the present invention can respectively collect images of the two surfaces of the substrate 20 through the first camera 400 and the second camera 500, so as to determine whether the coating films on the two surfaces of the substrate 20 are aligned according to the images of the two surfaces. If it is determined that the coating films on the two surfaces of the substrate 20 are not aligned, it is determined that there are coating defects. Therefore, the single-sided coating device 10 provided in the embodiment of the present invention can ensure the comprehensiveness of coating defect detection.

[0052] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A single-sided coating device, characterized in that: It includes a frame and a supporting mechanism, a driving mechanism, a coating die head, a first camera, a second camera and an oven arranged on the frame, wherein the supporting mechanism is used to support a substrate; the driving mechanism is used to drive the substrate to move; the coating die head and the first camera are located on a first side of a moving path of the substrate, and along the moving direction of the substrate, the first camera is located downstream of the coating die head, the coating die head is used to coat the surface of the substrate opposite to the coating die head, and the first camera is used to capture an image of the surface of the substrate opposite to the coating die head; the second camera is located on a second side of the moving path of the substrate, and the second camera is used to capture an image of the surface of the substrate opposite to the coating die head; the oven is used to dry the coated substrate.

2. The single-sided coating device according to claim 1, characterized in that: The second camera, the coating die head, the first camera and the oven are sequentially arranged along the moving path of the substrate.

3. The single-sided coating device according to claim 1, characterized in that: The supporting mechanism includes a first supporting member and a second supporting member both mounted on the frame, the first supporting member being opposite to and spaced apart from the first camera, and being used to support a substrate; the second supporting member being opposite to and spaced apart from the second camera, and being used to support a substrate.

4. The single-sided coating device according to claim 3, characterized in that: The first support member includes a first support roller and two first bearings, the second support member includes a second support roller and two second bearings, the inner rings of the two first bearings are respectively fixedly sleeved with the two ends of the first support roller, the outer rings of the two first bearings are both fixedly connected to the frame, the inner rings of the two second bearings are respectively fixedly sleeved with the two ends of the second support roller, and the outer rings of the two second bearings are both fixedly connected to the frame.

5. The single-sided coating device according to claim 1, characterized in that: The supporting mechanism comprises a coating roller assembly, wherein the coating roller assembly comprises a coating roller, wherein the coating roller is rotatably mounted on the frame, and the coating roller is opposite to and spaced from the coating die head; the driving mechanism comprises a motor, wherein the motor is transmission-connected to the coating roller and is used to drive the coating roller to rotate, and the coating roller drives the substrate to move when rotating.

6. The single-sided coating device according to claim 1, characterized in that: The supporting mechanism includes an encoding roller, which is rotatably mounted on the frame. The encoding roller is used to support the substrate and can rotate around its own axis as the substrate moves. The single-sided coating device also includes an encoder, which is mounted on one end of the encoding roller and is used to detect the rotation angle of the encoding roller.

7. The single-sided coating device according to claim 1, characterized in that: The supporting mechanism includes a tension detection roller, which is installed on the frame and is used to support the substrate; the single-sided coating device also includes a tension detection mechanism, which includes a pressure sensor connected to one end of the tension detection roller, and the pressure sensor is used to detect the tension of the substrate supported by the tension detection roller.

8. The single-sided coating device according to claim 7, characterized in that: The support mechanism also includes a tensioning roller, which is adjustably connected to the frame and is used to support the substrate. The tension of the substrate can be adjusted by adjusting the position of the tensioning roller relative to the frame along the radial direction of the tensioning roller.

9. The single-sided coating device according to any one of claims 1 to 8, characterized in that: The single-sided coating device further comprises a belt connecting mechanism, which is used to connect the substrate broken into two sections, and the belt connecting mechanism comprises a pressing assembly, which is used to press the broken substrate.

10. The single-sided coating device according to claim 9, characterized in that: The clamping assembly includes a support frame, a cylinder and a clamping piece. The support frame is connected to the frame, the cylinder is installed on the support frame, and the clamping piece is connected to the cylinder. The clamping piece is used to move under the drive of the cylinder and clamp the substrate between the clamping piece and the support frame to the support frame.

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