Coating detection device

Abstract

The utility model belongs to the technical field of lithium battery production and manufacturing, and discloses a coating detection device which comprises a winding and unwinding mechanism, a coating mechanism and a detection mechanism, the winding and unwinding mechanism comprises an unwinding shaft used for outputting a foil material belt and a winding shaft used for winding a coating material belt, and a stop mark is preset on one side, close to the tail end of the foil material belt, of the foil material belt; the coating mechanism is arranged between the unwinding shaft and the winding shaft; the detection mechanism comprises an unwinding detection assembly, the unwinding detection assembly is arranged on one side of the unwinding shaft and comprises an identification sensor used for detecting stop identification, and the identification sensor is connected with the coating mechanism and / or the winding and unwinding mechanism. The coating detection device disclosed by the utility model can automatically detect and realize detection and control on the length of the foil material strip tailings, and solves the problems of waste of the tailings or strip breakage.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery production and manufacturing, in particular to a coating detection device. Background Art

[0002] The coating process is a key process in lithium battery manufacturing, with high requirements for quality inspection and automated production. In actual production, when unwinding the foil material tape, an operator needs to observe the remaining amount of the tail material, and depends on the operator's experience to judge when to stop the machine and change the roll. However, through manual judgment and operation, it has high requirements for the operator's experience, and it is also easy to cause the situation of too much remaining tail material due to premature shutdown or tape breakage of the foil material tape due to too late shutdown. In the prior art, a laser sensor or an ultrasonic sensor is usually used to measure the diameter or thickness of the rolled material for detection. However, in the production and manufacturing of lithium batteries, the foil material tape used is very thin, and due to factors such as the tension effect, the deformation of the reel, and the thickness measurement error, the currently adopted measurement method still cannot achieve accurate identification. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a coating detection device, which can automatically detect and control the length of the tail material of the foil material tape, and solve the problems of waste of tail material or tape breakage.

[0004] To achieve this purpose, the utility model adopts the following technical solutions:

[0005] Provide a coating detection device, including a winding and unwinding mechanism, a coating mechanism, and a detection mechanism. The winding and unwinding mechanism includes an unwinding reel for outputting the foil material tape and a winding reel for winding the coated material tape. A stop mark is preset on one side of the foil material tape adjacent to its own tail end; the coating mechanism is arranged between the unwinding reel and the winding reel; the detection mechanism includes an unwinding detection component, and the unwinding detection component is arranged on one side of the unwinding reel. The unwinding detection component includes a mark sensor for detecting the stop mark, and the mark sensor is connected to the coating mechanism and / or the winding and unwinding mechanism.

[0006] In one embodiment, the coating mechanism includes a coating component, a drying component, and a transmission component. The transmission component is in transmission connection with the foil material tape to drive the foil material tape to pass through the coating component and the drying component in sequence.

[0007] In one embodiment, the coating component includes a first coating die head and a second coating die head respectively arranged on both sides of the foil material tape in the thickness direction. The first coating die head and the second coating die head are arranged in sequence along the conveying direction of the foil material tape. The drying component includes an oven, and the oven includes a first drying area, and the first drying area is arranged between the first coating die head and the second coating die head.

[0008] In one embodiment, the oven further includes a second drying area, which is arranged between the second coating die head and the winding shaft.

[0009] In one embodiment, the transmission assembly includes a first transmission shaft and a second transmission shaft arranged in sequence along the conveying direction of the foil material tape. The first transmission shaft is arranged between the unwinding shaft and the first drying area of the oven, and the second transmission shaft is arranged between the first drying area and the second area of the oven.

[0010] In one embodiment, it further includes a loading mechanism, which is arranged on one side of the unwinding shaft. The loading mechanism includes a winding drum for winding the foil material tape, and an identification inkjet printer is further arranged on one side of the winding drum to spray the stop identification on the foil material tape.

[0011] In one embodiment, the stop identification is a color identification, and the identification sensor is a color mark sensor.

[0012] In one embodiment, the detection mechanism further includes a coating detection assembly, which is arranged between the coating mechanism and the winding shaft. The coating detection assembly includes a density detector for detecting the coating density on the coated material tape.

[0013] In one embodiment, the detection mechanism further includes a defective inkjet printer connected to the coating detection assembly, and the defective inkjet printer is arranged between the density detector and the winding shaft.

[0014] In one embodiment, uncoated tab areas are provided on both sides of the coated material tape. When the coating detection assembly detects defective coating, the defective inkjet printer sprays a defective identification in the tab area.

[0015] Advantages of the present utility model:

[0016] A coating detection device of the present utility model, during the coating operation, first place the foil material tape on the unwinding shaft of the unwinding mechanism, then feed it towards the coating mechanism through the unwinding shaft, complete the coating operation on the foil material tape through the coating mechanism to form a coated material tape, and finally wind up the coated material tape through the winding shaft. In the present utility model, the coating detection device further includes a detection mechanism, and the detection mechanism includes an unwinding detection component arranged on one side of the unwinding shaft, and the unwinding detection component includes an identification sensor for detecting the stop mark on the foil material tape. Thus, during the operation, when the foil material tape continuously outputs from the unwinding shaft to near the tail end, the stop mark on the foil material tape is exposed. At this time, the identification sensor recognizes the stop mark on the foil material tape and transmits the induction signal to the coating mechanism and / or the winding and unwinding mechanism. The coating mechanism stops the coating operation and stops pulling and driving the foil material tape, and / or the unwinding shaft of the winding and unwinding mechanism stops outputting the foil material tape, so as to achieve precise detection and control of the length of the tail material of the foil material tape, and can effectively solve the problems of waste caused by premature shutdown or tape breakage caused by too late shutdown of the foil material tape, which is beneficial to improving the automation degree and operation efficiency of the coating operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the coating detection device in one of the embodiments;

[0018] Figure 2 is a schematic side structural diagram of the detection state of the unwinding detection component in one of the embodiments;

[0019] Figure 3 is a schematic three-dimensional structural diagram of the detection state of the unwinding detection component in one of the embodiments;

[0020] Figure 4 is a schematic diagram of the change process of the foil material tape, single-sided coated tape and coated material tape in one of the embodiments;

[0021] Figure 5 is a schematic structural diagram of the coated material tape in one of the embodiments.

[0022] In the figure:

[0023] 1. Unwinding reel; 2. Identification inkjet printer; 3. Winding reel; 4. Unwinding shaft; 5. Foil material tape; 51. Stop mark; 6. Identification sensor; 7. First coating die head; 8. First transmission shaft; 9. Single-sided coated tape; 10. Oven; 101. First drying area; 102. Second drying area; 11. Second coating die head; 12. Second transmission shaft; 13. Coated material tape; 131. Tab; 132. Defect mark; 14. Density detector; 15. Defect inkjet printer; 16. Winding shaft. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that for the convenience of description, only the parts related to the present utility model rather than all the structures are shown in the drawings.

[0025] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0026] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "above and over", and "on the top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below and under", and "under the bottom of" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0027] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationships shown in the drawings. It is only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meanings.

[0028] As Figures 1 to 5 shown, a coating detection device in this embodiment includes a rewinding and unwinding mechanism, a coating mechanism, and a detection mechanism. The rewinding and unwinding mechanism includes a unwind reel 4 for outputting a foil material tape 5 and a take-up reel 16 for winding a coated material tape 13. A stop mark 51 is preset on one side of the foil material tape 5 adjacent to its own tail end; the coating mechanism is arranged between the unwind reel 4 and the take-up reel 16 to complete the coating operation on the foil material tape 5; the detection mechanism includes an unwind detection component. The unwind detection component is arranged on one side of the unwind reel 4 and includes an identification sensor 6 for detecting the stop mark 51. The identification sensor 6 is connected to the coating mechanism and / or the rewinding and unwinding mechanism.

[0029] In this embodiment, during the coating operation, the foil material tape 5 is first placed on the unwind reel 4 of the unwind mechanism, and then fed towards the coating mechanism through the unwind reel 4. The coating mechanism performs a coating operation on the foil material tape 5 to form a coated material tape 13, and finally the coated material tape 13 is wound up by the take-up reel 16. In the embodiment, the coating detection device further includes a detection mechanism. The detection mechanism includes an unwind detection component arranged on one side of the unwind reel 4, and the unwind detection component includes an identification sensor 6 for detecting the stop mark 51 on the foil material tape 5. Thus, during the operation, when the foil material tape 5 is continuously output from the unwind reel 4 to near the tail end, the stop mark 51 on the foil material tape 5 is exposed. At this time, the identification sensor 6 recognizes the stop mark 51 on the foil material tape 5 and transmits the induction signal to the coating mechanism and / or the unwind mechanism. The coating mechanism stops the coating operation and stops pulling and driving the foil material tape 5, and / or the unwind reel 4 of the winding and unwinding mechanism stops outputting the foil material tape 5, so as to achieve accurate detection and control of the length of the tail material of the foil material tape 5, and can effectively solve the problems of waste caused by premature shutdown or tape breakage caused by too late shutdown of the foil material tape 5, which is beneficial to improving the automation degree and operation efficiency of the coating operation.

[0030] In one of the embodiments, the coating mechanism includes a coating component, a drying component and a transmission component. The transmission component is in transmission connection with the foil material tape 5 to drive the foil material tape 5 to pass through the coating component and the drying component in sequence. Specifically, the foil material tape 5 placed on the unwind reel 4 is in transmission connection with the transmission component, and the transmission component provides the driving force for transmission to drive the foil material tape 5 for transmission and conveying. Then the foil material tape 5 passes through the coating component and the drying component in sequence to complete coating and drying, and complete the coating operation. In actual operation, the identification sensor 6 is connected to the transmission component. Thus, when the identification sensor 6 senses the stop mark 51 and transmits the induction signal to the transmission component, at this time the transmission component stops transmitting the foil material tape 5, so as to stop the output of the foil material tape 5 in time.

[0031] In one of the embodiments, the coating component includes a first coating die head 7 and a second coating die head 11 respectively arranged on both sides of the foil material tape 5 in the thickness direction. Specifically, as Figure 1 and Figure 4 shown, the foil material tape 5 is released from the unwind reel 4 and moves under the drive of the transmission component. The foil material tape 5 moves past the first coating die head 7, and after the first coating die head 7 performs a coating operation on one side of the foil material tape 5 in the thickness direction, a single-sided coated single material tape 9 is formed. Subsequently, the single material tape 9 passes by the second coating die head 11, and the second coating die head 11 performs a coating operation on the uncoated side of the single material tape 9 to form a double-sided coated coated material tape 13. Then the coated material tape 13 finally formed by coating both sides in the thickness direction is wound up by the take-up reel 16 to complete the coating operation.

[0032] Specifically, the first coating die head 7 and the second coating die head 11 are arranged in sequence along the conveying direction of the foil material belt 5. The drying assembly includes an oven 10, and the oven 10 includes a first drying area 101 which is arranged between the first coating die head 7 and the second coating die head 11. After the foil material belt 5 is coated by the first coating die head 7, a single-sided material belt 9 is obtained. Before the single-sided material belt 9 is conveyed to the second coating die head 11 for the other-side coating operation, it first passes through the first drying area 101 for drying, and then the other-side coating operation is performed on the dried single-sided material belt 9, so as to avoid the possibility of uneven surface or contamination of the first-coated side when the other-side coating is directly and continuously performed, which affects the coating quality. Therefore, immediately drying the coated side after completing the coating operation on one side is beneficial to improving the stability and quality of the coating.

[0033] In one embodiment, the oven 10 further includes a second drying area 102 which is arranged between the second coating die head 11 and the winding shaft 16, so that after the single-sided material belt 9 undergoes the coating operation by the second coating die head 11, it first passes through the second drying area 102 for drying, and finally is wound by the winding shaft 16, ensuring the stability of the coating material on the coated material belt 13 and avoiding the occurrence of adhesion or contamination during the winding process, and ensuring the coating quality.

[0034] In one embodiment, the transmission assembly includes a first transmission shaft 8 and a second transmission shaft 12 which are arranged in sequence along the conveying direction of the foil material belt 5. The first transmission shaft 8 is arranged between the unwinding shaft 4 and the first drying area 101 of the oven 10, and the second transmission shaft 12 is arranged between the first drying area 101 of the oven 10 and the second area. Moreover, the first transmission shaft 8 and the first coating die head 7 are respectively arranged on both sides of the foil material belt 5 in the thickness direction, and the second transmission shaft 12 and the second coating die head 11 are respectively arranged on both sides of the single-sided material belt 9 in the thickness direction, thereby avoiding the contamination of the surface of the material belt by the first transmission shaft 8 and the second transmission shaft 12 and affecting the coating quality.

[0035] In one embodiment, it further includes a loading mechanism. The loading mechanism is arranged on one side of the unwinding shaft 4. The loading mechanism includes a winding drum 3 for winding the foil material tape 5. On one side of the winding drum 3, there is also an identification inkjet printer 2 for spraying a stop mark 51 on the foil material tape 5. Among them, the loading mechanism further includes a unwinding drum 1 for unwinding the foil material tape 5 onto the winding drum 3 to realize the unwinding operation of the foil material tape 5. Specifically, during the process of winding the foil material tape 5, a stop mark is pre-sprayed on the foil material tape 5 in advance. When the foil material tape 5 with the stop mark 51 is placed on the unwinding shaft 4 for unwinding and coating operation, the identification sensor 6 arranged on one side of the unwinding shaft 4 can identify the stop mark on the foil material tape 5, and the operation of stopping the roll change can be completed in time, achieving the effect of avoiding waste and breakage of the foil material tape 5.

[0036] In one embodiment, the stop mark 51 is a color mark, and the identification sensor 6 is a color mark sensor. The black mark is rectangular. In actual operation, the stop mark 51 adopted is a black mark with a size of 70mm×50mm. It is inkjet printed by the identification inkjet printer 2, with no protrusions on the surface, which will not change the thickness of the foil material tape 5 and does not affect the normal winding of the foil material tape 5. Further, the receiver and the light source of the color mark sensor are arranged perpendicular to the surface of the foil material tape 5, and the distance between the color mark sensor and the foil material tape 5 is within the range of 60 - 120mm, which can ensure that when the color mark sensor senses the black mark and the transmission mechanism stops transmitting, the tail material of the foil material tape 5 is used up as much as possible without causing breakage of the tape, further ensuring the accuracy of detection and control.

[0037] Of course, in other embodiments, the size of the black mark can be designed according to the specifications and sensing range of the color mark sensor, and the distance between the color mark sensor and the foil material tape 5 can also be not limited to the above range, as long as it can realize detection and control. Such designs all fall within the protection scope of the present utility model.

[0038] In addition, during the operation process, by continuously detecting the color change of the foil material tape 5 by the color mark sensor, the positive and negative current collector copper color and silver color (copper foil, aluminum foil) on the foil material tape 5, the white color of the separator, and the black color of the stop mark 51 can be clearly distinguished, so as to achieve the effect of accurate detection and control and avoid misdetection.

[0039] In one embodiment, the detection mechanism further includes a coating detection component, which is arranged between the coating mechanism and the take-up reel 16. The coating detection component includes a density detector 14 for detecting the coating density on the coated material tape 13. Since in the current industry, after the foil material tape 5 is coated, the method for identifying the abnormal areal density region is manual marking and offline areal density screening. Manual operation is difficult to accurately locate, there is a risk of abnormal products flowing out and excessive scrapping, and manually removing the electrode sheets affects production efficiency. Therefore, after the coating mechanism completes the coating operation and before the coated material tape 13 after coating is wound up by the take-up reel 16, a coating detection component is set to detect the coating areal density of the coated material tape 13 and check for poor coating conditions, so as to achieve the effect of controlling the coating quality.

[0040] Further, the detection mechanism further includes a defective inkjet printer 15 connected to the coating detection component. The defective inkjet printer 15 is arranged between the density detector 14 and the take-up reel 16. After the coating detection component detects the areal density of the coated material tape 13, if a defect is detected, a signal is fed back to the defective inkjet printer 15, and the defective inkjet printer 15 sprays a defective mark 132 at the corresponding defective position on the coated material tape 13, so as to facilitate easy detection and identification and cutting off the defective area during the subsequent use of the coated material tape 13, ensuring the quality of the final product.

[0041] In one embodiment, uncoated tab 131 regions are provided on both sides of the coated material tape 13. When the coating detection component detects poor coating, the defective inkjet printer 15 sprays the defective mark 132 in the tab 131 region. By spraying the defective mark 132 at the tab 131, it is convenient for identification, avoiding the interference between the defective mark 132 and the fabric on the coated material tape 13, which may cause difficulties in subsequent detection and identification, and is beneficial to improving the accuracy and efficiency of detection and identification.

[0042] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A coating detection device, characterized in that: include: A retracting and unreeling mechanism, the retracting and unreeling mechanism comprising an unreeling shaft (4) for outputting a foil material strip (5) and a reeling shaft (16) for reeling in a coating material strip (13), wherein a stop mark (51) is preset on one side of the foil material strip (5) adjacent to its own tail end; A coating mechanism, wherein the coating mechanism is arranged between the unwinding shaft (4) and the rewinding shaft (16); A detection mechanism, wherein the detection mechanism comprises an unwinding detection component, wherein the unwinding detection component is arranged on one side of the unwinding shaft (4), wherein the unwinding detection component comprises an identification sensor (6) for detecting the stop identification (51), and wherein the identification sensor (6) is connected to the coating mechanism and / or the retracting mechanism.

2. The coating detection device according to claim 1, characterized in that: The coating mechanism comprises a coating component, a drying component and a transmission component, wherein the transmission component is in transmission connection with the foil material belt (5) so as to drive the foil material belt (5) to pass through the coating component and the drying component in sequence.

3. The coating detection device according to claim 2, characterized in that: The coating component comprises a first coating die head (7) and a second coating die head (11) respectively arranged on both sides of the foil material strip (5) in the thickness direction, the first coating die head (7) and the second coating die head (11) being arranged in sequence along the conveying direction of the foil material strip (5), the drying component comprises an oven (10), the oven (10) comprises a first drying area (101), and the first drying area (101) is arranged between the first coating die head (7) and the second coating die head (11).

4. The coating detection device according to claim 3, characterized in that: The oven (10) further comprises a second drying area (102), wherein the second drying area (102) is arranged between the second coating die head (11) and the winding shaft (16).

5. The coating detection device according to claim 4, characterized in that: The transmission assembly comprises a first transmission shaft (8) and a second transmission shaft (12) which are arranged along the conveying direction of the foil material strip (5), wherein the first transmission shaft (8) is arranged between the unwinding shaft (4) and the first drying area (101) of the oven (10), and the second transmission shaft (12) is arranged between the first drying area (101) and the second area of ​​the oven (10).

6. The coating detection device according to any one of claims 1 to 5, characterized in that: The invention also comprises a feeding mechanism, which is arranged on one side of the unwinding shaft (4), and comprises a winding drum (3) for winding up the foil material strip (5), and a marking inkjet printer (2) is also arranged on one side of the winding drum (3) for spraying the stop mark (51) onto the foil material strip (5).

7. The coating detection device according to claim 6, characterized in that: The stop mark (51) is a color mark, and the mark sensor (6) is a color mark sensor.

8. The coating detection device according to any one of claims 1 to 5, characterized in that: The detection mechanism further comprises a coating detection component, the coating detection component is arranged between the coating mechanism and the winding shaft (16), and the coating detection component comprises a density detector (14) for detecting the coating density on the coating material strip (13).

9. The coating detection device according to claim 8, characterized in that: The detection mechanism also includes a defective inkjet printer (15) connected to the coating detection component, and the defective inkjet printer (15) is arranged between the density detector (14) and the winding shaft (16).

10. The coating detection device according to claim 9, characterized in that: Both sides of the coating material strip (13) are provided with uncoated tab (131) areas. When the coating detection component detects poor coating, the bad inkjet printer (15) sprays a bad mark (132) on the tab (131) area.

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