CN113695197B - Method capable of monitoring wind pressure and preventing pole piece from deviating and oven - Google Patents
Method capable of monitoring wind pressure and preventing pole piece from deviating and oven Download PDFInfo
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- CN113695197B CN113695197B CN202110996389.XA CN202110996389A CN113695197B CN 113695197 B CN113695197 B CN 113695197B CN 202110996389 A CN202110996389 A CN 202110996389A CN 113695197 B CN113695197 B CN 113695197B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/04—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases
- B05D3/0406—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases the gas being air
- B05D3/0413—Heating with air
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The invention discloses a method and a drying oven capable of monitoring wind pressure and preventing pole pieces from deviating, wherein the method comprises the following steps: pressure sensors are arranged on the upper tuyere box body and the lower tuyere box body in the oven, one side close to the air inlet and outlet of the oven and one side far away from the air inlet and outlet of the oven; detecting the wind pressure values close to and far away from the two sides of the air inlet and outlet in the oven through a pressure sensor and acquiring a wind pressure difference value; establishing a wind pressure early warning grade, establishing association between a wind pressure difference value and the wind pressure early warning grade, and outputting corresponding wind pressure early warning information outwards; the oven includes the oven box, and one side that is close to oven air inlet and outlet, keeps away from oven air inlet and outlet all is equipped with pressure sensor in last tuyere box, the lower tuyere box of oven box and the oven. The method and the oven capable of monitoring the air pressure and preventing the pole piece from deviating have the characteristics of simple structure and convenience in implementation, the air pressure and the pole piece deviating amount in the oven can be monitored during application, the baking quality and the product yield of the pole piece are improved, and the production benefit is improved.
Description
Technical Field
The invention relates to the field of lithium battery processing, in particular to a method and an oven capable of monitoring wind pressure and preventing a pole piece from deviating.
Background
In the lithium battery production field, because of the limitation of the height of a factory building, the oven structure of a large-scale coating machine is generally side air inlet, side air return and air exhaust. Therefore, the flow rate of one side of the oven close to the inlet and the outlet of the air pipe is relatively large or the flow speed is high; the flow rate of one side far away from the air inlet and the air outlet of the air pipe is relatively small, or the air speed is low.
After hot-blast air flow out of the tuyere and enter the oven, the wind field distribution in the oven is mainly or mainly influenced by the overall structure, rather than the influence of the air output consistency of the tuyere, namely: and the air pressure is low and the air speed is high when the air pressure is far away from one side of the air inlet and the air outlet, so that the deviation of the pole piece is easily caused.
Even if the difference of the air quantity and the air speed detection value of the inner side and the outer side of a single air nozzle is small, the air quantity and the air speed detection value are generally 1-2%. However, the pole piece needs to pass through tens of hundreds of air nozzles for drying, and the accumulated difference is large.
If the air valve and the air pressure are not adjusted evenly, the pole piece is easy to deviate in the oven. At present, the air pressure in the oven is detected in an open loop mode, and closed-loop control is not available. The debugging personnel need to move back and forth for hundreds of meters in order to observe and record the balance of the wind pressure and the deviation of the pole piece. When the double-layer coating is carried out, the height needs to be climbed for many times, and the workload is very large.
Common adverse consequences of pole piece deviation
1. The pole piece deviates, the position of the pole piece is inconsistent with the preset flow partition position of the air nozzle, and the dryness is different.
2. The pole piece deviation amount is large, the middle part of the oven possibly exceeds a tuyere baking area, and the area is seriously wet.
3. The pole piece is deviated by the unbalanced wind field area in the oven, and the oven export is forced to rectify the deviation, forms the extension of rectifying the power in the afterbody oven, leads to appearing violent fold on the whole pole piece broad width, forces to flatten on the roller of rectifying and leads to the dead fold. Wrinkles are higher than the coating gap at the second side coating die, causing scraping and belt breakage.
In conclusion, the prior art has the technical defects that the air pressure in the oven is unbalanced, the air pressure is difficult to monitor, the pole piece is easy to deviate, and the like, and further the problems that the drying uniformity of the pole piece is poor, the local part is seriously wet, the pole piece is dead-wrinkled, the material is easy to scrape and the belt is broken and the like are easily caused due to the deviation of the pole piece.
In view of the above, the present invention provides a new technical solution to solve the existing technical drawbacks.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a method capable of monitoring wind pressure and preventing deviation of a pole piece and an oven, and solves the technical problems that the wind pressure in the oven is difficult to monitor, the pole piece is easy to deviate, the pole piece is not uniformly baked, the local part is seriously wet, material scraping and belt breaking are easy to occur, and the like in the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a method for monitoring wind pressure and preventing pole piece deviation is provided, which comprises the following steps:
pressure sensors are arranged on the upper tuyere box body and the lower tuyere box body in the oven, one side close to the air inlet and outlet of the oven and one side far away from the air inlet and outlet of the oven;
detecting the wind pressure values at two sides close to and far away from the air inlet and outlet in the oven through a pressure sensor to obtain the wind pressure difference values at two positions;
and establishing a wind pressure early warning grade, establishing association between the wind pressure difference value and the wind pressure early warning grade, determining the wind pressure early warning grade in which the wind pressure difference value falls, and outputting corresponding wind pressure early warning information outwards, wherein the wind pressure early warning information corresponding to different wind pressure early warning grades is different.
As an improvement of the technical scheme, a pole piece deviation sensor is arranged in the oven, and the transverse deviation amount of the pole piece is detected through the pole piece deviation sensor.
As a further improvement of the technical scheme, the deviation grade is established, the deviation grade in which the transverse deviation amount of the pole piece falls is determined, and a corresponding deviation early warning is output outwards.
As a further improvement of the technical scheme, the deviation grade comprises that the deviation grade is within 10mm, 10-30mm, 30-100mm, within 100-150mm and more than 150mm.
As a further improvement of the technical scheme, the wind pressure difference level comprises a reference value, a limit value and a plurality of levels between the reference value and the limit value.
The invention also provides an oven capable of monitoring the air pressure and preventing the pole piece from deviating, which comprises an oven body, wherein an upper air nozzle box body and a lower air nozzle box body are arranged in the oven body, and pressure sensors are arranged on the upper air nozzle box body, the lower air nozzle box body and one side of the oven close to the air inlet and outlet of the oven and one side of the oven far away from the air inlet and outlet of the oven and used for detecting the air pressure at the corresponding position.
As an improvement of the technical scheme, the two pressure sensors which are arranged on one side of the oven body close to the air inlet and outlet of the oven and far away from the air inlet and outlet of the oven are used for measuring the air pressure difference value on the two sides of the oven body.
As a further improvement of the technical scheme, a pole piece deviation sensor is further arranged in the oven wire body and used for detecting the deviation of the pole piece in the oven.
As a further improvement of the technical scheme, the oven body is provided with a plurality of sections, and the pole piece deviation sensors are arranged in the oven body at the middle part and the tail part.
As a further improvement of the technical scheme, the pole piece deviation sensor is a position sensor.
The invention has the beneficial effects that: the invention provides a method for monitoring wind pressure and preventing a pole piece from deviating and an oven, wherein the method for monitoring the wind pressure and preventing the pole piece from deviating and the oven are characterized in that pressure sensors are arranged on two sides in the oven, the pressure sensors are used for detecting the pressure difference values on the two sides in the oven, and different wind pressure early warning information is sent aiming at different pressure difference values, so that a worker can timely make corresponding adjustment according to the early warning information, and the pole piece is prevented from deviating; on the other hand, the pole piece deviation sensor is arranged in the oven box body, the deviation amount of the pole piece is detected through the pole piece deviation sensor, corresponding deviation early warning information is sent according to the deviation amount of the different pole pieces, and then an operator can be timely reminded to conduct targeted adjustment work, the pole piece deviation exceeding a preset value is avoided, the situations that the pole piece is dry different, local serious deviation is wet, wrinkles are even broken, and the like are prevented, the baking quality of the oven is improved, and the yield and the production efficiency of products are improved.
In a word, the method capable of monitoring the air pressure and preventing the deviation of the pole piece and the oven solve the technical problems that the air pressure in the oven is difficult to monitor, the pole piece is easy to deviate, the baking of the pole piece is uneven, the local part is seriously wet, the scraping and the belt breaking are easy to occur and the like in the prior art.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a top view of an oven and schematic illustrations of two side mounted pressure sensors according to the present invention;
FIG. 2 is a schematic diagram of the side view of the upper tuyere box and the lower tuyere box in the oven and the installation of a pressure sensor in the invention;
FIG. 3 is a top view of the oven and a schematic diagram of the sensor mounted with the pole piece deflection.
In the upper figure, 1, a drying oven, 2, a pole piece, 3, an upper air nozzle box body in the drying oven, 4, a lower air nozzle box body in the drying oven, 5, a pressure sensor, 6 and a pole piece deviation sensor.
Detailed Description
The conception, the specific structure, and the technical effects produced by the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the features, and the effects of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and other embodiments obtained by those skilled in the art without inventive efforts are within the protection scope of the present invention based on the embodiments of the present invention. In addition, all the connection/connection relations referred to in the patent do not mean that the components are directly connected, but mean that a better connection structure can be formed by adding or reducing connection auxiliary components according to specific implementation conditions. The technical features of the invention can be interactively combined on the premise of not conflicting with each other, referring to fig. 1, fig. 2 and fig. 3.
In the technical scheme, the wind pressure in the oven is monitored and fed back on line, and the offset degree of the pole piece in the oven is monitored and fed back on line. And establishing an incidence relation between the unbalanced air pressure of the oven and the offset of the pole piece in the oven, quantizing and performing graded early warning.
The specific scheme is as follows:
a method for monitoring wind pressure and preventing pole piece deviation is provided, which comprises the following steps:
pressure sensors are arranged on the upper tuyere box body and the lower tuyere box body in the oven, one side close to the air inlet and outlet of the oven and one side far away from the air inlet and outlet of the oven;
detecting the wind pressure values at two sides close to and far away from the air inlet and outlet in the oven through a pressure sensor to obtain the wind pressure difference values at two positions;
and establishing a wind pressure early warning grade, establishing association between a wind pressure difference value and the wind pressure early warning grade, determining the wind pressure early warning grade in which the wind pressure difference value falls, and outputting corresponding wind pressure early warning information outwards, wherein the wind pressure early warning information corresponding to different wind pressure early warning grades is different, and the specific early warning information is displayed on a display screen of closed-loop monitoring.
Through the technical scheme, the wind pressure data and the pole piece deviation data of dozens of drying ovens are clear at a glance on a screen, and the complicated work of field observation and registration is omitted. And the incidence relation between the air pressure of the oven and the pole piece deviation can be efficiently matched.
The wind pressure difference value grades comprise a reference value, a limiting value and a plurality of grades between the reference value and the limiting value.
Specifically, the whole air pressure in the oven is generally micro negative pressure (-10-20 Pa), so that high-temperature air in the oven is prevented from overflowing, burning production and debugging personnel or wasting heat.
Detecting the wind pressure values of two sides close to and far away from the air inlet and the air outlet in the oven, calibrating the value of the wind pressure difference value of the two sides without causing the deviation of the pole piece as a reference value, and setting the wind pressure difference value causing the deviation in a graded association manner with the deviation and setting a limit.
The width of the pole piece, the thickness of the foil, the tension of the foil and the like are also factors influencing the deviation of the pole piece or resisting the deviation of the pole piece. For the same specification, batch and same tape tension, the air pressure difference value at two sides of the pole piece mainly influences the pole piece deviation degree.
For different customers or material specifications and batches, the wind pressure difference value and the deviation amount are also different, but the method for detecting the wind pressure difference value on the two sides of the pole piece is the same as the method for setting the deviation pressure difference reference and limit.
Preferably, a pole piece deviation sensor is arranged in the oven, and the transverse deviation of the pole piece is detected through the pole piece deviation sensor.
Establishing a deviation grade, determining the deviation grade of the pole piece falling into the transverse deviation amount, and outputting a corresponding deviation early warning outwards, specifically, classifying according to expected adverse consequences: the offset of the pole piece exceeds the grading value, so that an alarm is given in time, and the conditions of drying difference, folds and even fracture of the pole piece are avoided.
In a preferred embodiment, the walk-off rating includes within 10mm, within 10-30mm, within 30-100mm, within 100-150mm, and over 150mm.
In the above-described classification, the classification is carried out,
if the thickness exceeds 10mm, the flow guide alignment of the edges of the air nozzles and the excessive drying of the margin areas of the edges of the pole pieces are influenced;
if the thickness exceeds 30mm, the dislocation of the preset zone heating position of the air nozzle is influenced, so that the dryness of the pole piece in the width direction is different;
over 100mm, the pole piece deviation is large, the middle part of the oven may exceed the tuyere baking area, and the area is seriously wet. The second surface is raised and cracked when being dried after being coated;
when the width of the pole piece exceeds 150mm, the outlet of the oven is forcibly corrected, and the extension of the correction force is formed in the oven at the tail part, so that severe wrinkles appear on the width of the whole pole piece, and the wrinkles are caused by forcibly flattening on a correction roller; the wrinkles are higher than the coating gap at the second side coating die head, which easily causes scraping and belt breaking.
In the classification, the specific classification standard is only a classification method corresponding to one type of pole piece, and the value is focused on the classification method and not only a specific value. The above values are slightly different from customer to customer and from material batch to batch, but the grading method is the same.
Based on the method for monitoring the air pressure and preventing the deviation of the pole piece, the invention also provides the oven capable of monitoring the air pressure and preventing the deviation of the pole piece, which comprises an oven body, wherein an upper air nozzle box body and a lower air nozzle box body are arranged in the oven body, one sides of the upper air nozzle box body, the lower air nozzle box body and the oven, which are close to the air inlet and outlet of the oven, and one sides of the upper air nozzle box body, the lower air nozzle box body and the oven, which are far away from the air inlet and outlet of the oven, are respectively provided with a pressure sensor, and the pressure sensors are used for detecting the air pressure at corresponding positions.
Preferably, two pressure sensors which are arranged on one side of the oven body close to the air inlet and outlet of the oven and far away from the air inlet and outlet of the oven are used for measuring the air pressure difference value on two sides of the oven body.
Preferably, a pole piece deviation sensor is further arranged in the oven wire body and used for detecting the deviation of the pole piece in the oven, and preferably, the pole piece deviation sensor is a position sensor.
Because the foil is continuous, the deviation measuring tool has a linear relation, in order to further control the cost performance, the oven body has a plurality of sections, and the deviation sensor of the pole piece is not arranged in each section of oven, so long as the middle part and the tail part of the oven are additionally arranged.
Example (c): the coating machine is provided with 10 sections of drying ovens, 5 th or 6 th sections and 9 th or 10 th sections, and 6 sections of drying ovens, 3 rd section and 6 th section are additionally arranged at two positions.
In the prior art, when the dryness is poor, the air valve can be adjusted blindly to adjust the air quantity and the air pressure, and the overshoot value can even reach-50 Pa to 100Pa. Such high wind pressure values can cause the pole pieces to wander in the oven. Not only does not solve the problem of poor dryness, but also causes new problems of wrinkles and broken belts.
The pole piece often moves a great deal of way in the oven, leads to the pole piece to go out the rectifying capability of rectifying mechanism behind the oven, often rectifies the limit.
In the technical scheme, the problems can be easily solved after causal tracing and subdivision control.
In the technical scheme, after the wind pressure difference reference, the deviation grading limit, a series of detection, feedback and closed-loop control means such as the partition of the air nozzle, the edge diversion, the abnormal deformation and the like are established, the causal relationship and the logical relationship of the drying, deformation and cracking problems of each pole piece are correspondingly solved, the debugging method is smoothed, the product yield is improved, and a foundation is laid for improving the average production efficiency of the coating and drying industry in a new round.
While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (3)
1. A method capable of monitoring wind pressure and preventing pole pieces from deviating is characterized by comprising the following steps:
pressure sensors are arranged on the upper tuyere box body and the lower tuyere box body in the oven, one side close to the air inlet and outlet of the oven and one side far away from the air inlet and outlet of the oven;
detecting the wind pressure values at two sides close to and far away from the air inlet and outlet in the oven through a pressure sensor to obtain the wind pressure difference values at two positions;
establishing a wind pressure early warning grade, establishing association between a wind pressure difference value and the wind pressure early warning grade, determining the wind pressure early warning grade in which the wind pressure difference value falls, and outputting corresponding wind pressure early warning information outwards, wherein the wind pressure early warning information corresponding to different wind pressure early warning grades is different;
arranging a pole piece deviation sensor in the oven, and detecting the transverse deviation of the pole piece through the pole piece deviation sensor;
establishing a deviation grade, determining the deviation grade of the transverse deviation of the pole piece, and outputting a corresponding deviation early warning outwards;
the deviation grades comprise within 10mm, 10-30mm, 30-100mm, within 100-150mm and over 150mm;
the wind pressure difference value grades comprise a reference value, a limiting value and a plurality of grades between the reference value and the limiting value.
2. The utility model provides a can monitor wind pressure and prevent that pole piece from walking oven partially which characterized in that: the drying oven comprises an oven body, wherein an upper air nozzle body and a lower air nozzle body are arranged in the oven body, pressure sensors are arranged on one sides of the upper air nozzle body, the lower air nozzle body and the oven close to an air inlet and outlet of the oven and one sides of the upper air nozzle body, the lower air nozzle body and the oven far away from the air inlet and outlet of the oven, and the pressure sensors are used for detecting air pressure at corresponding positions;
the two pressure sensors which are arranged on one side of the oven body close to the air inlet and outlet of the oven and far away from the air inlet and outlet of the oven are used for measuring the air pressure difference value on the two sides of the oven body;
and a pole piece deviation sensor is also arranged in the oven wire body and used for detecting the deviation of the pole piece in the oven.
3. The oven of claim 2, wherein the oven is capable of monitoring wind pressure and preventing the pole pieces from deviating, and the oven is characterized in that: the oven box body is provided with a plurality of sections, and the pole piece deviation sensors are arranged in the oven box body at the middle part and the tail part.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110996389.XA CN113695197B (en) | 2021-08-27 | 2021-08-27 | Method capable of monitoring wind pressure and preventing pole piece from deviating and oven |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110996389.XA CN113695197B (en) | 2021-08-27 | 2021-08-27 | Method capable of monitoring wind pressure and preventing pole piece from deviating and oven |
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| Publication Number | Publication Date |
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| CN113695197A CN113695197A (en) | 2021-11-26 |
| CN113695197B true CN113695197B (en) | 2023-04-07 |
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Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5689900A (en) * | 1995-08-21 | 1997-11-25 | Toshiba Battery Co., Ltd. | Drying apparatus and drying method |
| JP3560702B2 (en) * | 1995-08-21 | 2004-09-02 | 東芝電池株式会社 | Meandering prevention device |
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