CN111495702B - Detection control system and method for pole piece coating size - Google Patents
Detection control system and method for pole piece coating size Download PDFInfo
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- CN111495702B CN111495702B CN202010455801.2A CN202010455801A CN111495702B CN 111495702 B CN111495702 B CN 111495702B CN 202010455801 A CN202010455801 A CN 202010455801A CN 111495702 B CN111495702 B CN 111495702B
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- 238000000576 coating method Methods 0.000 title claims abstract description 178
- 239000011248 coating agent Substances 0.000 title claims abstract description 168
- 238000001514 detection method Methods 0.000 title claims abstract description 168
- 238000000034 method Methods 0.000 title claims abstract description 48
- 230000007547 defect Effects 0.000 claims description 33
- 238000012937 correction Methods 0.000 claims description 29
- 230000008569 process Effects 0.000 claims description 28
- 238000001035 drying Methods 0.000 claims description 24
- 239000007888 film coating Substances 0.000 claims description 9
- 238000009501 film coating Methods 0.000 claims description 9
- 238000001125 extrusion Methods 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000002699 waste material Substances 0.000 abstract description 4
- 230000000007 visual effect Effects 0.000 description 8
- 230000033001 locomotion Effects 0.000 description 6
- 230000001276 controlling effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 238000011179 visual inspection Methods 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 230000004075 alteration Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000007765 extrusion coating Methods 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000013519 translation Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 230000000391 smoking effect Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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Abstract
The application provides a detection control system and a detection control method for a pole piece coating size, wherein the detection control system for the pole piece coating size comprises the following components: the first dry film detection device is suitable for detecting the size of the coated dry film of the first surface of the pole piece and is arranged between the oven after the first surface is coated and the second surface coating device; the wet film detection device is suitable for detecting the size of the coated wet film on the second surface of the pole piece and is arranged between the second surface coating device and the second surface coated oven; the second dry film detection device is suitable for detecting the size of the coated dry film on the second surface of the pole piece and is arranged behind the oven after the second surface is coated; and a control device adapted to control the first side coating device and the second side coating device according to the coated dry film size of the first side, the coated wet film size of the second side and the coated dry film size of the second side. The application ensures the consistency of the coating sizes of the first surface and the second surface of the pole piece, improves the coating rate, and avoids the increase of the manufacturing cost of the battery cell caused by the great waste of the pole piece.
Description
Technical Field
The application relates to the field of lithium ion battery manufacturing, in particular to a detection control system and method for pole piece coating size of a lithium ion battery.
Background
The size detection mode of the pole piece of the high-speed double-sided extrusion coater of the positive electrode and the negative electrode of the lithium battery which is mainstream at present is as follows: and after the front and back pole pieces are dried, the size of the dry film is detected, and then the detection result is fed back to an operator or a control system, and closed-loop adjustment is performed through manual adjustment or the system.
A conventional visual inspection method using a Charge Coupled Device (CCD) inspection camera is shown in fig. 1: the automatic unreeling machine automatically unreels, the pole piece substrate passes through the surface density detection device 1 and the deviation correction device 1, the front coating process is carried out by the front coating device, and the pole piece substrate is transmitted to a lower layer 50 m oven to dry the pole piece after front coating; then, the pole piece after front coating and drying passes through a deviation correcting device 2, a traction device 1, a surface density detecting device 2 and a deviation correcting device 3, a back coating process is carried out by a back coating device, and the pole piece after back coating is transmitted to a 50-meter oven at the upper layer to be dried; then, the pole piece after double-sided coating and drying enters a visual detection system (comprising a front detection CCD, a back detection CCD and a CCD detection control device) to carry out coating size detection through a deviation correcting device 4, a traction device 2 and a surface density detection device 3; and finally, automatically collecting materials by an automatic winding machine. The dashed lines with arrows in fig. 1 indicate the direction of movement of the pole piece during the double-sided coating and dimension detection process.
The visual inspection method shown in fig. 1 mainly has the following problems:
the coating size detection mode is that dry film size detection (such as front detection CCD and back detection CCD in figure 1) is carried out after the front and back pole pieces are dried, size adjustment is carried out by using the detected results, hysteresis exists in the detection results, the pole pieces in the whole oven are unqualified in size in practice, and the hysteresis detection causes great waste of the pole pieces; in addition, the current mainstream detection mode is only used for detecting the size of the pole piece, has no coating surface defect detection function, and cannot timely detect coating defects such as bubbles, streaks, foil leakage and the like. Therefore, the quality problem of the coated pole piece is caused by the hysteresis quality of size detection and no defect detection function, the product quality is reduced, the manufacturing cost of the battery core is increased, and meanwhile, the potential safety hazards of lithium precipitation, short circuit, smoke emission, fire and the like of the battery caused by the fact that unqualified pole pieces flow into the subsequent process exist.
Disclosure of Invention
The application aims to solve the technical problems that the quality of a coated pole piece is caused by hysteresis of the existing size detection, the product quality is reduced, the manufacturing cost of an electric core is increased and the potential safety hazard is caused.
In order to solve the technical problems, the application discloses a detection control system for a pole piece coating size, which is applied to a pole piece double-sided coating system, wherein the pole piece double-sided coating system comprises a first side coating device, a first side coating back oven, a second side coating device and a second side coating back oven which are sequentially arranged; the detection control system for the coating size of the pole piece comprises:
the first dry film detection device is suitable for detecting the size of the coated dry film of the first surface of the pole piece and is arranged between the oven and the second surface coating device after the first surface is coated;
a wet film detection device suitable for detecting the size of the coated wet film on the second surface of the pole piece, and arranged between the second surface coating device and a second surface coated oven;
the second dry film detection device is suitable for detecting the size of the coated dry film of the second surface of the pole piece and is arranged after the second surface is coated;
and the control device is suitable for controlling the first surface coating device and the second surface coating device to be adjusted according to the size of the coated dry film of the first surface, the size of the coated wet film of the second surface and the size of the coated dry film of the second surface, and is respectively connected with the first dry film detection device, the wet film detection device and the second dry film detection device.
Optionally, the control logic of the control device includes:
adjusting the first surface coating device to control the size of the coated dry film of the first surface to be within the technical specification range when the size of the coated dry film of the first surface exceeds the technical specification range;
adjusting the second surface coating device to control the size of the coated wet film of the second surface to be within the technical specification range by taking the size of the coated dry film of the first surface as a reference;
comparing the coated wet film size of the second surface with the coated dry film size of the second surface, and adjusting the second surface coating device to control the coated dry film size of the second surface to be within the technical specification range.
Optionally, the detection control system of the pole piece coating size further comprises a deviation rectifying device suitable for adjusting the pole piece position, and the deviation rectifying device is arranged between the oven after the first surface coating and the second surface coating device; the control device is also connected with the deviation correcting device and is suitable for comparing the size of the coated dry film of the first surface with the size of the coated dry film of the second surface, and the deviation correcting device is adjusted to control the edge alignment degree of the coated dry films of the first surface and the second surface to be within the technical specification range.
Optionally, the deviation rectifying device includes: the device comprises a correction sensor, a correction motor, a correction roller driven by the correction motor, and a correction controller connected with the correction sensor and the correction motor, wherein the correction sensor is suitable for detecting the edge position of a pole piece; the control device is connected with the deviation rectifying controller.
Optionally, the first dry film detection device is further adapted to detect a surface defect of the first surface after the first surface of the pole piece is coated and dried, the wet film detection device is further adapted to detect a surface defect of the second surface of the pole piece before the second surface of the pole piece is coated and dried, and the second dry film detection device is further adapted to detect a surface defect of the second surface of the pole piece after the second surface of the pole piece is coated and dried.
In order to solve the technical problems, the application also discloses a detection control method for the coating size of the pole piece, which comprises the following steps:
after the first surface of the pole piece is coated and dried, detecting the size of a coated dry film of the first surface of the pole piece;
detecting the size of a coated wet film on the second surface of the pole piece before drying the second surface of the pole piece;
after coating and drying the second surface of the pole piece, detecting the size of a coated dry film of the second surface of the pole piece;
and adjusting the double-sided coating control of the pole piece according to the size of the coated dry film of the first surface of the pole piece, the size of the coated wet film of the second surface of the pole piece and the size of the coated dry film of the second surface of the pole piece.
Optionally, the adjusting the control of the double-sided coating of the pole piece according to the size of the coated dry film on the first surface of the pole piece, the size of the coated wet film on the second surface of the pole piece and the size of the coated dry film on the second surface of the pole piece includes:
when the size of the coated dry film of the first surface exceeds the technical specification range, adjusting the coating process of the first surface of the pole piece to control the size of the coated dry film of the first surface to be within the technical specification range;
adjusting the coating process of the second surface of the pole piece by taking the coating dry film size of the first surface as a reference so as to control the coating wet film size of the second surface to be within a process specification range;
and comparing the coated wet film size of the second surface with the coated dry film size of the second surface, and adjusting the coating process of the second surface of the pole piece to control the coated dry film size of the second surface to be within the process specification range.
Optionally, the method for detecting and controlling the coating size of the pole piece further comprises the following steps: comparing the coated dry film size of the first surface with the coated dry film size of the second surface, and adjusting the position of the pole piece before the second surface of the pole piece is coated to control the edge alignment degree of the coated dry films of the first surface and the second surface to be within the technical specification range.
Optionally, the method for detecting and controlling the coating size of the pole piece further comprises the following steps: detecting surface defects of a first surface of a pole piece after coating and drying the first surface; detecting surface defects of a second surface of the pole piece before drying after coating the second surface; and detecting surface defects of the second surface of the pole piece after coating and drying the second surface.
Compared with the prior art, the technical scheme of the application has at least the following beneficial effects:
the first dry film detection device is arranged between the oven after the first surface is coated and the second surface coating device, namely, the size of the coated dry film of the first surface of the pole piece is detected after the first surface of the pole piece is coated and dried and before the second surface is coated; the wet film detection device is arranged between the second surface coating device and the second surface coating rear oven, namely before drying after coating the second surface of the pole piece, and detects the size of the coated wet film on the second surface of the pole piece; the second dry film detection device is arranged after the second surface is coated and dried in a drying oven, namely after the second surface of the pole piece is coated and dried, and the size of the coated dry film on the second surface of the pole piece is detected; the control device controls the first surface coating device and the second surface coating device to adjust according to the coated dry film size of the first surface, the coated wet film size of the second surface and the coated dry film size of the second surface. Therefore, the problem of detection hysteresis existing in the prior art can be effectively solved, the dislocation sizes of the first surface and the second surface can be immediately detected after the second surface is coated with the wet film and fed back to the control system for adjustment, the consistency of the sizes of the first surface and the second surface is ensured, the coating rate is improved, and the increase of the manufacturing cost of the battery cell caused by a great deal of waste of the pole piece is avoided.
The method can make data statistics according to the detected size of the coated dry film of the second surface and the size of the coated wet film of the second surface, analyze the size shrinkage ratio of the wet film in the drying process, and provide better control logic for a closed-loop control system according to big data self-learning, so that the effectiveness of the second surface wet film and the dry film size is ensured, and batch scrapping caused by size problems is avoided.
The real-time detection of the coating sizes of the first surface and the second surface can realize the closed-loop control of the size detection and the alignment degree of the first surface and the second surface, and can effectively reduce the pole piece waste caused by manual process sampling and the shutdown loss caused by process detection.
The first dry film detection device, the wet film detection device and the second dry film detection device can also monitor the surface defect condition of the pole piece in real time on line, and when the defects such as continuous bubbles, streaks and metal leakage occur, the device can give an alarm in time to prompt an operator to perform on-line or stop processing, so that batch scrapping is avoided, and potential safety hazards such as lithium precipitation, short circuit, smoking, fire and the like of a battery caused by the fact that the unqualified pole piece flows into a subsequent process are avoided.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a system for detecting the coating dimensions of a pole piece during a double-sided extrusion coating process;
FIG. 2 is a schematic diagram of a pole piece coating dimension detection control system applied to a pole piece double-sided coating system according to an embodiment of the present application;
fig. 3 is a schematic diagram of connection relations between parts of the deviation correcting device according to the embodiment of the application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
In the description of the present application, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "top", "bottom", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may include one or more of the feature, either explicitly or implicitly. Moreover, the terms "first," "second," and the like, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the application described herein may be implemented in sequences other than those illustrated or otherwise described herein.
The pole piece detection mode provided by the embodiment of the application detects the size of the coated dry film of the first surface, the size of the coated wet film of the second surface and the size of the coated dry film of the pole piece in real time and performs analysis control, so that the problem that the pole piece in the oven is scrapped due to detection lag of the conventional visual detection system can be effectively solved; in addition, the coating appearance defect detection can be compatible while the size of the coated pole piece is detected. The detection mode can perform self-learning through the change condition of the dry film and the wet film, and timely perform reasonable closed-loop adjustment control to ensure that the size of the coated double-sided pole piece is within the technical specification range.
Referring to fig. 2, the detection control system for the coating size of the pole piece of the present embodiment is applied to a pole piece double-sided coating system, which includes a first side coating device a11, a first side coating post-oven a12, a second side coating device a13, and a second side coating post-oven a14, which are sequentially arranged; the detection control system for the coating size of the pole piece comprises: a first dry film detection device A21, a wet film detection device A22, a second dry film detection device A23 and a control device A24. In fig. 2, the dashed lines with arrows indicate the direction of movement of the pole pieces during the coating and detection process, or the pole piece trend, the sequential arrangement refers to the sequence in which the pole pieces pass one after the other in the direction of movement of the pole pieces, wherein the device in which the pole pieces pass first is arranged before the device in which the pole pieces pass second is arranged after the device in which the pole pieces pass second.
The first dry film detection device A21 is suitable for detecting the size of the coated dry film of the first surface of the pole piece, and the first dry film detection device A21 is arranged between the oven A12 and the second surface coating device A13 after the first surface is coated. The wet film detection device a22 is adapted to detect the size of the coated wet film on the second side of the pole piece, and the wet film detection device a22 is disposed between the second side coating device a13 and the second side coated oven a 14. The second dry film detection device A23 is suitable for detecting the size of the coated dry film on the second surface of the pole piece, and the second dry film detection device A23 is arranged behind the oven A14 after the coating of the second surface. The control device a24 is adapted to control the first side coating device a11 and the second side coating device a13 to adjust according to the size of the coated dry film of the first side, the size of the coated wet film of the second side and the size of the coated dry film of the second side, and the control device a24 is respectively connected with the first dry film detection device a21, the wet film detection device a22 and the second dry film detection device a 23.
Further, the detection control system for the coating size of the pole piece of the embodiment further comprises a deviation correcting device A25 which is suitable for adjusting the position of the pole piece and is arranged between the oven A12 after the first surface coating and the second surface coating device A13; the control device A24 is also connected with the deviation correcting device A25, and is suitable for comparing the size of the coated dry film of the first surface with the size of the coated dry film of the second surface, and adjusting the deviation correcting device A25 to control the alignment degree of the edges of the coated dry films of the first surface and the second surface to be within the technical specification range.
The first dry film detection device A21 is further suitable for detecting surface defects of the first surface after coating and drying of the first surface of the pole piece, the wet film detection device A22 is further suitable for detecting surface defects of the second surface before drying after coating and drying of the second surface of the pole piece, and the second dry film detection device A23 is further suitable for detecting surface defects of the second surface after coating and drying of the second surface of the pole piece.
In specific implementation, the detection control system for the coating size of the pole piece of the embodiment may be referred to as a high-speed double-sided extrusion coater visual detection and front-back size alignment closed-loop control system, and includes: the CCD visual detection control device comprises three sets of CCD visual detection cameras, detection light sources and a deviation correcting device for performing size closed loop, and the distribution position of the whole detection control system in the double-layer extrusion coating system is shown in figure 2. As shown in fig. 2, according to the dotted line with arrow, i.e. the trend of the pole piece, the component structures of the pole piece double-sided coating system and the pole piece coating size detection control system are sequentially arranged from front to back and are respectively as follows:
an automatic unreeling machine; an areal density detection device 1; the deviation correcting device 1 (the deviation correcting is shared before unreeling and the first surface coating); a first side coating device a11 (first side coating, corresponding to the front side coating device in fig. 1); a first side post-coating oven a12 (corresponding to the lower 50 meter oven in fig. 1); the deviation rectifying device 2 (lower layer is discharged from the oven for rectifying deviation); traction device 1 (lower oven traction); an areal density detection device 2 (for detecting a first areal dry film areal density); deviation rectifying device a25 (second side pre-coating deviation rectifying); a first dry film detecting device a21 (for detecting the size and appearance defect of the coated dry film on the first surface, a CCD visual detecting camera may be used); a second side coating device a13 (second side coating, corresponding to the back side coating device in fig. 1); a wet film detection device a22 (for detecting the size and appearance defect of the coated wet film on the second surface, a CCD visual detection camera may be used); a second side post-coating oven a14 (corresponding to the upper 50 meter oven in fig. 1); the deviation correcting device 4 (upper layer goes out of the oven to correct deviation); traction device 2 (upper oven traction); an areal density detection device 3 (for detecting the areal density of the double-sided dry film of the first/second sides); a second dry film detecting device a23 (for detecting the size and appearance defect of the coated dry film on the second surface, a CCD visual detecting camera may be used); a deviation correcting device 5 (deviation correcting before winding); an automatic winding machine. The control device a24 (CCD vision detection control device) is connected to the first dry film detection device a21, the wet film detection device a22, the second dry film detection device a23, and the deviation correction device a25, respectively.
The control logic of the control device a24 includes: adjusting the first surface coating device to control the size of the coated dry film of the first surface to be within the technical specification range when the size of the coated dry film of the first surface exceeds the technical specification range; adjusting the second surface coating device to control the size of the coated wet film of the second surface to be within the technical specification range by taking the size of the coated dry film of the first surface as a reference; comparing the coated wet film size of the second surface with the coated dry film size of the second surface, and adjusting the second surface coating device to control the coated dry film size of the second surface to be within the technical specification range.
In practice, the control device a24 is used for graphic and data transmission, arrangement, analysis and feedback, and the specific dimension detection and closed loop control logic is as follows:
firstly, detecting the dried coated dry film size of the first surface according to a first dry film detection device A21, if the dried coated dry film size of the first surface is not in the technical specification range, alarming and reminding the size to exceed the specification by a system, manually intervening by a first surface operator, and adjusting the extrusion die head or screw pump speed of the first surface coating device A11 on line to enable the detected size of the first dry film detection device A21 to be in the technical specification range; taking the qualified coated dry film size of the first surface detected by the first dry film detection device A21 as a second surface coating reference, detecting the coated wet film size of the second surface by the wet film detection device A22, and adjusting the second surface coating device A13 by a second surface operator according to the detected coated wet film size of the second surface so that the coated wet film size of the second surface detected by the wet film detection device A22 is within a process specification range; the size detection closed-loop control system can be set to an automatic mode at this time, the whole system can be compared according to the data detected by the first dry film detection device A21 and the wet film detection device A22 and the system setting data, meanwhile, the size data of the coated dry film of the second surface detected by the second dry film detection device A23 is used as a reference, and the control system can correspondingly and automatically adjust the extrusion die head and the screw pump of the deviation correcting device A25 or the second surface coating device A13 according to the comparison result, so that the edge alignment degree of the dry film of the first surface and the second surface is in the process specification range to realize automatic closed-loop control.
In the whole detection control system, the second dry film detection device a23 is used for detecting the size of the coated dry film on the second surface, and mainly has two functions: firstly, the edge of a wet film coated on the second surface is contracted in the drying process, the comparison is carried out with the size of the wet film coated on the second surface detected by the wet film detection device A22, the comparison result is fed back to an extrusion die head or a screw pump of the second surface coating device A13 by the control device A24, the wet film coating size is regulated in real time, the closed-loop control is realized, and the dry film size coated on the second surface is ensured to be within the technical specification range; and secondly, the device is used for detecting the size of the coated dry film of the second surface, comparing the size with the size of the coated dry film of the first surface detected by the first dry film detection device A21, feeding back the result to the deviation correcting device A25 by the control device A24, correcting and adjusting in time, and realizing closed-loop control so as to ensure that the edge alignment degree of the actual coated dry films of the first surface and the second surface in the whole process is within the process range.
The control device a24 may incorporate detection control system software, and the interface diagram of the detection control system software may display the first side, the second side coating size data, the first side/second side misalignment data, and the like. The software main interface may be composed of: the menu bar, the tool bar, the image display area, the film roll information display area, the hardware connection state display area, the detection result display area and the like, the real-time size information of each film coating area and each foil area can be displayed on the main interface, and an operator can adjust the coating size at any time according to interface display data.
Referring to fig. 3, the deviation correcting device a25 as an actuator for closed-loop control of the first and second dry film edge alignment may include: the device comprises a correction sensor A251, a correction motor A252, a correction roller A253 driven by the correction motor A252, and a correction controller A254 connected with the correction sensor A251 and the correction motor A252, wherein the correction sensor A251 is suitable for detecting the edge position of a pole piece; the control device A24 is connected with the deviation rectifying controller A254.
Specifically, the deviation rectifying roller a253 is mounted on the deviation rectifying fixing frame, the deviation rectifying roller a253 can be driven by the deviation rectifying motor a252 to rotate around the center through a guide mechanism, and the deviation rectifying roller a253 can be driven by the deviation rectifying motor a252 in a translation mode; the deviation correcting sensor A251 detects the edge position of the pole piece on the deviation correcting roller A253 in real time and feeds back the edge position to the deviation correcting controller A254, and left and right sensors can be respectively arranged on two sides of the deviation correcting roller A253 to detect the edge positions of two sides of the pole piece. After the pole piece is coated by the second surface coating device A13, through the detection of the first dry film detection device A21 and the second dry film detection device A23, the control device A24 detects the deviation of the size of the front and back coated surfaces (the first surface and the second surface) after the second surface is coated, and the operation result information is fed back to the deviation rectifying controller A254, and the deviation rectifying controller A254 sends an instruction to the deviation rectifying sensor A251 according to the deviation of the size of the front and back coated surfaces of the pole piece detected by the control device A24 and the edge position of the pole piece detected by the deviation rectifying sensor A251, so that the deviation rectifying sensor A251 is controlled to move to a proper position along the feeding mechanism. Because the position of the deviation correcting sensor A251 is changed, in order to keep the corresponding position relation between the position of the deviation correcting roller A253 and the position of the deviation correcting sensor A251, the deviation correcting controller A254 sends an instruction to control the action of the deviation correcting motor A252, so that the deviation correcting motor A252 drives the deviation correcting roller A253 to rotate and simultaneously perform translational motion, and the coated pole piece on the deviation correcting roller A253 moves to a required position under the dual actions of translational motion and rotational motion. In the whole coating process, the detection control system detects feedback information in real time and the closed-loop control system continuously adjusts, so that errors of the edges of the front side and the back side of the coating are reduced, and online closed-loop control is achieved.
The embodiment of the application also provides a detection control method of the pole piece coating size, which comprises the following steps: after the first surface of the pole piece is coated and dried, detecting the size of a coated dry film of the first surface of the pole piece; detecting the size of a coated wet film on the second surface of the pole piece before drying the second surface of the pole piece; after coating and drying the second surface of the pole piece, detecting the size of a coated dry film of the second surface of the pole piece; and adjusting the double-sided coating control of the pole piece according to the size of the coated dry film of the first surface of the pole piece, the size of the coated wet film of the second surface of the pole piece and the size of the coated dry film of the second surface of the pole piece.
Wherein, according to the dry film size of the first surface of the pole piece, the wet film size of the second surface of the pole piece and the dry film size of the second surface of the pole piece, adjusting the double-sided coating control of the pole piece can include:
when the size of the coated dry film of the first surface exceeds the technical specification range, adjusting the coating process of the first surface of the pole piece to control the size of the coated dry film of the first surface to be within the technical specification range;
adjusting the coating process of the second surface of the pole piece by taking the coating dry film size of the first surface as a reference so as to control the coating wet film size of the second surface to be within a process specification range;
and comparing the coated wet film size of the second surface with the coated dry film size of the second surface, and adjusting the coating process of the second surface of the pole piece to control the coated dry film size of the second surface to be within the process specification range.
Further, the method for detecting and controlling the coating size of the pole piece can further comprise the following steps: comparing the coated dry film size of the first surface with the coated dry film size of the second surface, and adjusting the position of the pole piece before the second surface of the pole piece is coated to control the edge alignment degree of the coated dry films of the first surface and the second surface to be within the technical specification range.
Further, the detection control method for the coating size of the pole piece further comprises the following steps: pole piece defect detection, which may specifically include: detecting surface defects of a first surface of a pole piece after coating and drying the first surface; detecting surface defects of a second surface of the pole piece before drying after coating the second surface; and detecting surface defects of the second surface of the pole piece after coating and drying the second surface.
In practice, with reference to fig. 2, the specific process of coating CCD visual inspection and closed loop control can be as follows:
after the deviation of the dried first surface pole piece is corrected, the size and defect detection of the coated dry film of the first surface are carried out; then coating the second surface, and then detecting the size and defect of the coated wet film on the second surface; then, after correction, the dried second-face pole piece is subjected to the size and defect detection of a coating dry film of the second face;
the first dry film detection device A21, the wet film detection device A22 and the second dry film detection device A23 detect the coating sizes, the edge white-keeping sizes and the surface defect conditions of the pole pieces on the first surface and the second surface of the pole pieces in real time, and transmit the acquired size data to the control device A24, and when the defect conditions occur, the control device A24 alarms in time to prompt an operator to perform online or shutdown treatment so as to avoid batch scrapping;
after the control device A24 compares and calculates with the set reference parameters, feedback information is transmitted to a closed-loop control system, the closed-loop control system adjusts the size and the position of the coated pole piece according to the feedback information until the CCD detects that the size and the position deviation of the coated surface of the pole piece substrate are within the preset process value, namely the process specification range, and the whole closed-loop control system continues to monitor and control the size of the process further;
the control device A24 transmits feedback information to the closed-loop control system after comparing and calculating with the reference position, and the closed-loop control system adjusts the left and right positions of the running direction of the pole piece base material according to the feedback information through the translation and rotation of the deviation correcting motor of the deviation correcting device A25, so that the size of the coated pole piece and the alignment degree of the edges of the coated dry films of the first face and the second face are ensured to be within the technical specification range.
In view of the foregoing, it will be evident to a person skilled in the art that the foregoing detailed disclosure may be presented by way of example only and may not be limiting. Although not explicitly described herein, those skilled in the art will appreciate that the present application is intended to embrace a variety of reasonable alterations, improvements and modifications to the embodiments. Such alterations, improvements, and modifications are intended to be proposed by this disclosure, and are intended to be within the spirit and scope of the exemplary embodiments of this disclosure.
Furthermore, certain terms in the present disclosure have been used to describe embodiments of the present disclosure. For example, "one embodiment," "an embodiment," and/or "some embodiments" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present disclosure. Thus, it is emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various portions of this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined as suitable in one or more embodiments of the disclosure.
It should be appreciated that in the foregoing description of embodiments of the disclosure, various features of the application are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure. Alternatively, the application may be practiced where various features are dispersed throughout a plurality of embodiments of the application. However, this is not to say that a combination of these features is necessary, and it is entirely possible for a person skilled in the art to extract some of them as separate embodiments to understand them when reading this application. That is, embodiments of the present application may also be understood as an integration of multiple secondary embodiments. While each secondary embodiment is satisfied by less than all of the features of a single foregoing disclosed embodiment.
In some embodiments, numbers expressing quantities or properties used to describe and claim certain embodiments of the application are to be understood as being modified in some instances by the term "about," approximately, "or" substantially. For example, unless otherwise indicated, "about," "approximately," or "substantially" may mean a change in a value of ±20% of what it describes. Accordingly, in some embodiments, the numerical parameters set forth in the written description and attached claims are approximations that may vary depending upon the desired properties sought to be obtained by the particular embodiment. In some embodiments, numerical parameters should be construed in light of the number of reported significant digits and by applying ordinary rounding techniques. Notwithstanding that the numerical ranges and parameters setting forth the broad scope of the embodiments of the application are approximations, the numerical values set forth in the specific examples are reported as precisely as possible.
Each patent, patent application, publication of patent application, and other materials, such as articles, books, specifications, publications, documents, articles, etc., cited herein are hereby incorporated by reference. The entire contents for all purposes, except for any prosecution file history associated therewith, may be any identical prosecution file history inconsistent or conflicting with this file, or any identical prosecution file history which may have a limiting influence on the broadest scope of the claims. Now or later in association with this document. For example, if there is any inconsistency or conflict between the description, definition, and/or use of terms associated with any of the incorporated materials, the terms in the present document shall prevail.
Finally, it is to be understood that the embodiments of the application disclosed herein are illustrative of the principles of embodiments of the present application. Other modified embodiments are also within the scope of the application. Accordingly, the disclosed embodiments are illustrative only and not limiting. Those skilled in the art can adopt alternative configurations to implement the application of the present application according to embodiments of the present application. Thus, embodiments of the application are not limited to what has been described in the application precisely.
Claims (5)
1. The detection control system comprises a first surface coating device, a first surface coating back oven, a second surface coating device and a second surface coating back oven which are sequentially arranged; the detection control system of the pole piece coating size is characterized by comprising the following components: the first dry film detection device is suitable for detecting the size of the coated dry film of the first surface of the pole piece and is arranged between the oven and the second surface coating device after the first surface is coated;
a wet film detection device suitable for detecting the size of the coated wet film on the second surface of the pole piece, and arranged between the second surface coating device and a second surface coated oven;
the second dry film detection device is suitable for detecting the size of the coated dry film of the second surface of the pole piece and is arranged after the second surface is coated;
the control device is suitable for controlling the first surface coating device and the second surface coating device to be adjusted according to the coated dry film size of the first surface, the coated wet film size of the second surface and the coated dry film size of the second surface, and is respectively connected with the first dry film detection device, the wet film detection device and the second dry film detection device;
the detection control system of the pole piece coating size further comprises a deviation correcting device which is suitable for adjusting the position of the pole piece and is arranged between the oven after the first surface coating and the second surface coating device; the control device is also connected with the deviation correcting device and is suitable for comparing the size of the coated dry film of the first surface with the size of the coated dry film of the second surface, and the deviation correcting device is adjusted to control the alignment degree of the edges of the coated dry films of the first surface and the second surface to be within the technical specification range;
the size detection and closed loop control logic of the control device comprises:
comparing the data detected by the first dry film detection device and the wet film detection device with system setting data, and simultaneously referring to the coated dry film size data of the second surface detected by the second dry film detection device, and correspondingly and automatically adjusting the deviation correcting device or the second surface coating device according to the comparison result, so that the edge alignment degree of the first surface and the second surface dry film is in the process specification range to realize automatic closed-loop control;
wherein, the second dry film detection device is used for the coating dry film size of the second face of detection, includes:
the device is used for comparing the wet film coating size of the second surface detected by the wet film detection device, feeding back the comparison result to an extrusion die head or a screw pump of the second surface coating device by the control device, and adjusting the wet film coating size in real time to realize closed-loop control and ensure that the dry film size coated on the second surface is within the technical specification range; and
the device is used for comparing actual data with the size of the coated dry film of the first surface detected by the first dry film detection device, feeding back the result to the deviation correction device by the control device, correcting and adjusting at proper time, and realizing closed-loop control so as to ensure that the alignment degree of the edges of the actual coated dry films of the first surface and the second surface in the whole process is within the process range;
the size detection and closed loop control logic of the control device further comprises: firstly, when the size of the coated dry film of the first surface exceeds the technical specification range, adjusting the first surface coating device to control the size of the coated dry film of the first surface to be within the technical specification range; the method comprises the steps that the coating dry film size of a first surface is taken as a second surface coating reference, the wet film detection device detects the coating wet film size of a second surface, and the second surface coating device is adjusted according to the detected coating wet film size of the second surface, so that the coating wet film size of the second surface detected by the wet film detection device is within a process specification range; setting a detection control system of the pole piece coating size as an automatic mode of size detection and closed-loop control, and entering a size detection and closed-loop control logic of the control device;
the control logic of the control device further comprises: comparing the coated wet film size of the second surface with the coated dry film size of the second surface, and adjusting the second surface coating device to control the coated dry film size of the second surface to be within the technical specification range.
2. The pole piece coating dimension detection control system of claim 1, wherein the deviation correcting device comprises: the device comprises a correction sensor, a correction motor, a correction roller driven by the correction motor, and a correction controller connected with the correction sensor and the correction motor, wherein the correction sensor is suitable for detecting the edge position of a pole piece; the control device is connected with the deviation rectifying controller.
3. The system of claim 1, wherein the first dry film detection device is further adapted to detect a surface defect of the first side of the pole piece after the first side of the pole piece is coated and dried, the wet film detection device is further adapted to detect a surface defect of the second side of the pole piece before the second side of the pole piece is dried after the second side of the pole piece is coated, and the second dry film detection device is further adapted to detect a surface defect of the second side of the pole piece after the second side of the pole piece is coated and dried.
4. A pole piece coating dimension detection control method for use in the pole piece coating dimension detection control system of any one of claims 1 to 3, comprising:
a first dry film detection device for detecting the size of the coated dry film on the first surface of the pole piece after the first surface of the pole piece is coated and dried;
a wet film detection device for detecting the size of the coated wet film on the second surface of the pole piece before the second surface of the pole piece is coated and dried;
a second dry film detection device for detecting the size of the coated dry film on the second surface of the pole piece after coating and drying the second surface of the pole piece;
according to the dry film coating size of the first surface of the pole piece, the wet film coating size of the second surface of the pole piece and the dry film coating size of the second surface of the pole piece, the double-sided coating control of the pole piece is adjusted, and the method specifically comprises the following steps:
comparing the data detected by the first dry film detection device and the wet film detection device with system setting data, and simultaneously referring to the coated dry film size data of the second surface detected by the second dry film detection device, and correspondingly and automatically adjusting the deviation correcting device or the second surface coating device according to the comparison result, so that the alignment degree of the edges of the dry films of the first surface and the second surface is in the process specification range to realize automatic closed-loop control;
wherein, the second dry film detection device is used for the coating dry film size of the second face of detection, includes:
the device is used for comparing the wet film coating size of the second surface detected by the wet film detection device, feeding back the comparison result to an extrusion die head or a screw pump of the second surface coating device by the control device, and adjusting the wet film coating size in real time to realize closed-loop control and ensure that the dry film size coated on the second surface is within the technical specification range; and
the device is used for comparing actual data with the size of the coated dry film of the first surface detected by the first dry film detection device, feeding back the result to the deviation correction device by the control device, correcting and adjusting at proper time, and realizing closed-loop control so as to ensure that the alignment degree of the edges of the actual coated dry films of the first surface and the second surface in the whole process is within the process range;
the adjusting the double-sided coating control of the pole piece according to the size of the coated dry film of the first surface of the pole piece, the size of the coated wet film of the second surface of the pole piece and the size of the coated dry film of the second surface of the pole piece comprises the following steps: firstly, when the size of the coated dry film of the first surface exceeds the technical specification range, adjusting the first surface coating device to control the size of the coated dry film of the first surface to be within the technical specification range; the method comprises the steps that the coating dry film size of a first surface is taken as a second surface coating reference, the wet film detection device detects the coating wet film size of a second surface, and the second surface coating device is adjusted according to the detected coating wet film size of the second surface, so that the coating wet film size of the second surface detected by the wet film detection device is within a process specification range; setting a detection control system of the pole piece coating size as an automatic mode of size detection and closed-loop control, and entering a size detection and closed-loop control logic of the control device;
further comprises: comparing the size of the coated wet film of the second surface with the size of the coated dry film of the second surface, and adjusting the coating process of the second surface of the pole piece to control the size of the coated dry film of the second surface to be within the process specification range;
the detection control method for the coating size of the pole piece further comprises the following steps: comparing the coated dry film size of the first surface with the coated dry film size of the second surface, and adjusting the position of the pole piece before the second surface of the pole piece is coated to control the edge alignment degree of the coated dry films of the first surface and the second surface to be within the technical specification range.
5. The method for controlling the detection of the coating dimension of a pole piece according to claim 4, further comprising: detecting surface defects of a first surface of a pole piece after coating and drying the first surface;
detecting surface defects of a second surface of the pole piece before drying after coating the second surface; and detecting surface defects of the second surface of the pole piece after coating and drying the second surface.
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| CN114985217A (en) * | 2022-08-05 | 2022-09-02 | 楚能新能源股份有限公司 | Double-sided coating equipment and method for lithium battery pole piece |
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