CN111804530B

CN111804530B - Micro-concave coating weight control method, storage medium and device for lithium battery production

Info

Publication number: CN111804530B
Application number: CN202010525781.1A
Authority: CN
Inventors: 徐忠伟; 夏旭东; 徐琢; 林久; 许晓雄
Original assignee: Zhejiang Funlithium New Energy Tech Co Ltd
Current assignee: Zhejiang Funlithium New Energy Tech Co Ltd
Priority date: 2020-06-10
Filing date: 2020-06-10
Publication date: 2022-05-17
Anticipated expiration: 2040-06-10
Also published as: CN111804530A

Abstract

The invention relates to a method, a storage medium and a device for controlling the coating weight of a dimple for lithium battery production, relates to the technical field of lithium battery production, and solves the problem of uneven coating caused by the reduction of the coating weight along with the extension of coating time. In the coating process, the sealing part of the material box is abraded to a certain extent, so that the sealing property of the material box is reduced in the coating process, slurry leaks to a certain extent, the pressure in the material box is reduced, and the coating amount is reduced. According to the invention, the flow of the discharge port is correspondingly adjusted according to the change of the pressure by detecting the pressure in the material box, so that the coating uniformity is improved.

Description

Micro-concave coating weight control method, storage medium and device for lithium battery production

Technical Field

The invention relates to the technical field of lithium battery production, in particular to a method, a storage medium and a device for controlling the coating weight of a micro-recess based on a lithium battery.

Background

Dimple coating is widely used as a precision coating method. In the lithium battery industry, the micro-concave coating is applied to the processes of diaphragm surface treatment, positive and negative pole piece current collector surface treatment, positive and negative pole piece surface treatment and the like, and has wide application in other industries such as optical films, permeable membranes and the like.

The conventional method for controlling the coating amount by the dimple coating includes: the number of the micro-concave rollers and the speed ratio. The adjustment of the number of the micro-concave roller to the coating amount is stepwise, and the change of the number of the micro-concave roller from 200 to 150 meshes tends to bring about a relatively large change of the coating amount. The coating weight is adjusted in a speed ratio mode, fine adjustment can be carried out in a certain range, and therefore uniform roll coating is carried out.

The above prior art solutions have the following drawbacks: the effect of the change in speed ratio on coating weight is non-linear, and an increase in speed ratio may cause an increase in coating weight, but may also cause a decrease. With the extension of the coating time, the sealing part of the material box is possibly worn, so that the sealing performance of the material box is reduced in the coating process, slurry leaks to a certain degree, the pressure in the material box is changed finally, the coating amount is reduced, and the improvement space is provided.

Disclosure of Invention

The invention aims to provide a method for controlling the coating weight of a dimple based on a lithium battery, which can carry out adaptive adjustment according to pressure change by detecting internal pressure and adjusting a discharge port, thereby improving the coating weight and ensuring more uniform coating.

The above object of the present invention is achieved by the following technical solutions:

a method for controlling the coating weight of a dimple based lithium battery comprises the following steps:

the slurry tank is connected with the feed inlet of the material box through a pump, and the discharge outlet of the material box is connected with the slurry tank;

acquiring current pressure detection information of a discharge port;

and controlling the opening and closing angle of the electric gate preset at the discharge port according to the comparison condition between the current pressure detection information and the preset pressure reference value.

Through adopting above-mentioned technical scheme, through the pump with carrying out the circulation of coating between thick liquids jar and the magazine, through the detection to the pressure variation of discharge gate to contrast with the pressure reference value, with the angle that opens and shuts of adjusting electric gate, thereby adjust the pressure of the coating in the magazine, improve the coating weight, the practicality is strong.

The invention is further configured to: the method comprises the following steps:

the discharge ports and the electric gates are respectively provided with two groups, and are defined as a first discharge port, a second discharge port, a first electric gate and a second electric gate;

acquiring current first pressure information of a first discharge port and current second pressure information of a second discharge port;

and calculating the average value of the first pressure information and the second pressure information to obtain pressure detection information.

Through adopting above-mentioned technical scheme, through the setting of first discharge gate and second discharge gate to export going out the magazine is two, and is synchronous practical, better adjusts, and reaction rate is fast, more flexibility, and detects first pressure information and second pressure information, with control first electric gate and second electric gate, and the practicality is strong.

controlling the indication of the preset block-shaped indicator light according to the comparison relationship between the first pressure information and the second pressure information and the preset pressure impact information;

if the first pressure information is greater than the pressure impact information, controlling the block-shaped indicator lamp to indicate at the discharge port corresponding to the first pressure information;

and if the second pressure information is greater than the pressure impact information, controlling the blocky indicator lamp to indicate at the discharge port corresponding to the second pressure information.

Through adopting above-mentioned technical scheme, contrast through first pressure information and second pressure information and pressure striking information to the instruction of control pilot lamp, and instruct in discharge gate department, it is more directly perceived, can judge the caking condition in the masking liquid simultaneously, the practicality is strong.

acquiring current time information;

calling a current lazy electric gate from a preset time matching database according to current time information, wherein the current lazy electric gate is a first electric gate or a second electric gate;

the first electric gate and the second electric gate are both provided with response opening and closing angles in unit time;

if the opening and closing angle is adjusted to be smaller than or equal to the response opening and closing angle, adjusting the opening and closing angle of the non-lazy electric gate;

if the opening and closing angle is adjusted to be larger than the response opening and closing angle, the angle exceeding the response opening and closing angle is adjusted by the lazy electric gate compensation angle.

Through adopting above-mentioned technical scheme, through the judgement to current time information to judge the lazy electric gate of current, thereby control first electric gate and second electric gate, make fatigue degree between them reduce, improve holistic life.

acquiring current first flow rate information of a first discharge port and current second flow rate information of a second discharge port;

the preset movable angle is also included, and the movable angle of the first electric gate is increased and the movable angle of the second electric gate is synchronously reduced in unit time according to the current opening and closing angle of the first electric gate and the second electric gate;

if the first flow rate information is not changed, an alarm is given at the first discharge port;

and if the second flow rate information is not changed, alarming is carried out at the second discharge port.

Through adopting above-mentioned technical scheme, detect the user state of first electric gate and second electric gate to carry out the analysis to the user state of first electric gate, second electric gate, early suggestion of discovering reduces the loss.

The invention is further configured to: further comprising:

acquiring current temperature information of the paint in the material box;

controlling the opening and closing of a heating wire preset at the feeding hole according to the comparison relationship between the current temperature information and the preset reference temperature information;

if the current temperature information is less than the reference temperature information, the heating wire is started and heating is carried out at the preset heating temperature;

and the micro-concave roller is also pre-provided with a preheating wire which is heated when the micro-concave roller rotates.

Through adopting above-mentioned technical scheme, through the acquirement to current temperature information to the control heater opens and close to improve the temperature of coating, cooperate the preheating wire on the little concave roller again simultaneously, thereby improved the drying rate after coating is paintd, raise the efficiency.

acquiring current environment temperature information;

and searching out the compensation temperature from a pre-stored temperature compensation database according to the current environment temperature information, and increasing the heating temperature of the heating wire.

Through adopting above-mentioned technical scheme, through the detection to current ambient temperature to the heating temperature of appropriate improvement heater, thereby reduce the loss in the conduction process, with improvement holistic flexibility, with holistic practicality.

acquiring current material distance information of a material to be coated and current coating distance information after coating;

matching surface distance information after coating is applied from a preset coating database according to the current material distance information;

feeding back coating information according to the comparison condition between the current coating distance information and the surface distance information;

the feedback smearing information comprises over-thickness information, over-thin information, missing information and qualified information;

if the current paint distance information is larger than the surface distance information, feeding back over-thickness information;

if the current paint distance information is equal to the surface distance information, feeding back qualified information;

if the current paint distance information is smaller than the surface distance information, feeding back the over-thin information;

and if the current paint distance information is smaller than the surface distance information or the current paint distance information is larger than the surface distance information for one or more times, feeding back missing information.

By adopting the technical scheme, the distance between the materials and the distance between the materials after the materials are coated with the coating are detected, so that the coating thickness is judged, the coating thickness is divided into four results of over-thick result, over-thin result, missing result and qualified result, and the integral intuitiveness is improved.

The invention aims to provide a storage medium, which can perform adaptive adjustment according to pressure change through detection of internal pressure and adjustment of a discharge port, thereby improving coating amount.

a storage medium comprising a program capable of being loaded and executed by a processor to implement the lithium battery-based dimple coating amount control method as described above.

The invention aims to provide a micro-concave coating amount control device based on a lithium battery, which can detect the internal pressure and adjust a discharge port, thereby carrying out adaptive adjustment according to the pressure change and improving the coating amount.

a device for controlling the coating weight of a dimple based lithium battery includes:

a processor for loading and executing a set of instructions; and

such as the storage medium described above.

In conclusion, the beneficial technical effects of the invention are as follows:

1. through the detection of the internal pressure and the adjustment of the discharge port, the adaptability adjustment is carried out according to the pressure change, and the coating amount is improved;

2. the service states of the first electric gate and the second electric gate are detected in advance, and loss is reduced.

Drawings

FIG. 1 is a schematic diagram of a method for detecting pressure at a discharge port.

Fig. 2 is a schematic diagram of a method of acquiring pressure detection information.

FIG. 3 is a schematic diagram of a method of block detection.

Fig. 4 is a schematic diagram of a method for quickly responding to an electric gate.

Fig. 5 is a schematic diagram of a method for determining the quality of the electric gate.

Fig. 6 is a schematic view of a method of flash drying.

Fig. 7 is a schematic diagram of a method of ambient temperature compensation.

Fig. 8 is a schematic view of a method of paint application effect.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, in the method for controlling the coating amount of the micro-pits based on the lithium battery, a slurry tank is connected with a feed inlet of a slurry tank through a pump, a discharge outlet of the slurry tank is connected with the slurry tank, the coating in the slurry tank flows into the slurry tank through the pump by the operation of the pump, and the coating in the slurry tank flows into the slurry tank through the discharge outlet and then circulates through an electric gate, so that the coating flows circularly.

The method for detecting the pressure of the discharge port comprises the following steps:

and S100, acquiring current pressure detection information of the discharge hole.

The pressure detection information detects the pressure of the coating through a pressure sensor, so that the pressure value of the discharge hole is fed back.

And S101, controlling the opening and closing angle of the electric gate preset at the discharge hole according to the comparison condition between the current pressure detection information and the preset pressure reference value.

The pressure reference value is a preset value, and is adjusted adaptively according to different coatings to be coated, and is adjusted by workers according to actual conditions. And matching the opening and closing angle of the corresponding electric gate from the corresponding pressure reference value through the pressure detection information. The opening and closing angles are different, and the vacated areas are different, so that the passing amount is controlled.

Referring to fig. 2, two groups of discharge ports and two groups of electric gates are respectively defined as a first discharge port, a second discharge port, a first electric gate and a second electric gate; the amount of coating is controlled out through first electric gate on the first discharge gate, and the amount of coating is controlled out through second electric gate on the second discharge gate, equally divide through two and do not carry out solitary detection to pressure.

The method for acquiring the pressure detection information comprises the following steps:

and S200, acquiring current first pressure information of the first discharge hole and current second pressure information of the second discharge hole.

Acquiring the current pressure of the first discharge hole, and then acquiring first pressure information; and acquiring the current pressure of the second discharge hole, acquiring second pressure information, and acquiring information through the pressure sensor.

Step S201, calculating an average value of the first pressure information and the second pressure information to obtain pressure detection information.

And adding the collected first pressure information and the second pressure information, and dividing by two to obtain an average value of the first pressure information and the second pressure information, wherein the average value is used as pressure detection information, and the first pressure information and the second pressure information are both pressure values.

Referring to fig. 3, during the detection, the pressure at two positions is determined, and when the blocking or lumpy material occurs in the paint, the blocking or lumpy material outputs a large signal when contacting the pressure sensor during the flowing process, thereby determining the lumpy.

And the block detection method comprises the following steps:

and step S300, controlling the indication of the preset block-shaped indicator lamp according to the comparison relationship between the first pressure information and the second pressure information and the preset pressure impact information.

The pressure impact information is a preset pressure value, is set by a worker according to the actual condition, and can acquire signals through the first pressure information and the second pressure information, so that the block-shaped indicator lamp indicates corresponding to the impact position. If the lumps are too large, clogging may occur, resulting in poor rolling effect.

Step S301, if the first pressure information is larger than the pressure impact information, controlling the block-shaped indicator lamp to indicate at the discharge port corresponding to the first pressure information.

When the pressure detected at the first discharge port exceeds the standard, the pressure can be indicated at the first detection port.

Step S302, if the second pressure information is larger than the pressure impact information, the blocky indicator lamp is controlled to indicate at the discharge port corresponding to the second pressure information.

When the pressure detected at the second discharge port exceeds the standard, the pressure can be indicated at the second detection port.

In addition, during the indication, a local indication or a remote indication may be adopted, and the setting is performed by a worker according to the situation of the field and the working environment, which is not described herein.

Referring to fig. 4, the adjustment of the opening and closing angle of the electric shutter according to the pressure is required, and is provided to improve the response capability and the service life of the electric shutter. The quick response method of the electric gate comprises the following steps:

and step S400, acquiring current time information.

In order to prolong the service life, the current time information is acquired, the time information is adjusted by taking days as a unit, and the switching use is carried out through the integral setting, so that the service life is prolonged.

Step S401, calling a current lazy electric gate from a preset time matching database according to current time information, wherein the current lazy electric gate is a first electric gate or a second electric gate;

and matching the database according to the current time and the preset time so as to select a lazy electric gate which is a defined electric gate. For example, when the date is odd, the first electric gate is the lazy electric gate, and when the date is even, the second electric gate is the lazy electric gate.

And S402, setting the response opening and closing angles in unit time for the first electric gate and the second electric gate.

Because the adopted electric gates are different, the first electric gate and the second electric gate both have own response time, and the maximum limit of the response opening and closing angle in unit time, namely 1S, can also set the unit time to be 0.5S and the like according to the adjustment of precision.

And S403, if the opening and closing angle is adjusted to be smaller than or equal to the response opening and closing angle, adjusting the opening and closing angle of the non-lazy electric gate.

Once the opening and closing angle required to be adjusted is smaller than or equal to the response opening and closing angle, the electric gate defined as the lazy electric gate is not moved, and the other electric gate is opened and closed at the corresponding angle.

And S404, if the opening and closing angle is adjusted to be larger than the response opening and closing angle, the angle exceeding the response opening and closing angle is adjusted by the idle electric gate to compensate the angle.

In case the angle that opens and shuts that needs to adjust is greater than the response angle that opens and shuts, the electric gate who is defined as lazy electric gate also need open and shut, earlier carries out opening and shutting of corresponding angle through another electric gate, and remaining angle opens and shuts through lazy electric gate, and two electric gates are adjusted in step, and reaction rate is faster.

Referring to fig. 5, when the electric gate is used, the quality of the electric gate is determined, and the method comprises the following steps:

step S500, current first flow rate information of the first discharge port and current second flow rate information of the second discharge port are obtained.

The flow rate of the first discharge port and the flow rate of the second discharge port are detected through the flow rate sensor, and first flow rate information and second flow rate information are output.

Step S501, a preset movable angle is included, and according to the current opening and closing angle of the first electric gate and the second electric gate, the movable angle of the first electric gate is increased in unit time and the movable angle of the second electric gate is synchronously reduced.

The movable angle is a preset opening or closing angle, is adjusted according to the current opening and closing angle, is synchronously increased or decreased in unit time, and is an opening movable angle when the electric gate is closed; if the two electric gates are opened, whether the opening angle is larger than the movable angle or not is judged, and once the opening angle is smaller than the movable angle, the electric gates are opened.

If the opening angles are larger than the movable angles, the opening or closing movable angles of any electric gate are selected.

And step S502, if the first flow rate information is not changed, alarming is carried out at the first discharge port.

And judging the flow rate information of the first discharge hole after the change, and once the flow rate is not changed, giving an alarm by sound on the system.

And S503, if the second flow rate information is not changed, alarming is carried out at the second discharge port.

And judging the flow rate information of the second discharge hole after the change, and once the flow rate is not changed, giving an alarm by sound on the system.

Referring to fig. 6, after the coating material is coated by the micro-concave roller, it needs to be dried, so the coating material is heated and the micro-concave roller is heated for drying, and the steps are as follows:

and step S600, obtaining the current temperature information of the coating in the material box.

And detecting the temperature of the coating in the current material box, and when detecting, detecting the temperature by adopting a temperature sensor.

Step S601, controlling the opening and closing of a heating wire preset at the feeding hole according to the comparison relationship between the current temperature information and the preset reference temperature information.

The reference temperature information is the temperature of the paint and is set by the worker according to the condition of the paint. And compare with current temperature information to the start-up of the heater that will set up at the feed inlet, thereby heat the coating.

Step S602, if the current temperature information is less than the reference temperature information, the heater is turned on and heating is performed at a preset heating temperature.

When the temperature of the coating is lower than the preset temperature, the heating wire is conducted to heat, and the preset heating temperature is the temperature of one heating wire.

Step S603, a preheating wire is also preset on the micro concave roller, and the preheating wire is heated when the micro concave roller rotates.

The preheating wire of the micro-concave roller is arranged on the rotating shaft which is arranged in the middle of the micro-concave roller in a penetrating mode, and the rotating shaft is heated, so that the micro-concave roller is scalded and heated, and heating is carried out. The function of preheating the conveying material is achieved, and meanwhile, the micro concave roller keeps heating and continuously heats when rotating.

Referring to fig. 7, the current ambient temperature is detected, and once the ambient temperature is too low, the paint is cooled down rapidly, and for improving the effect, the heating temperature is increased, and the following steps are performed:

s700, acquiring current environment temperature information;

The current temperature is the temperature of the current location, and is detected by a temperature sensor, and the temperature compensation database contains temperature and compensation data, such as: 10 ℃ corresponds to No. 1 heating wire, and 5 ℃ corresponds to No. 2 heating wire.

The temperature of the coating is adjusted by conducting different heating wires. And the original heating wire is in a state of working all the time.

Referring to fig. 8, after the paint is coated, the thickness of the paint before and after coating is detected, and a high-precision displacement distance measuring sensor is adopted, so that the precision of the high-precision displacement distance measuring sensor can reach 0.01 mm. And the detection steps are as follows:

and S800, acquiring the current material distance information of the material to be coated and the current paint distance information after the paint is coated.

And detecting the current material distance information and the current paint distance information through a high-precision displacement distance measuring sensor.

And step S801, matching the surface distance information after the paint is smeared out from a preset paint database according to the current material distance information.

And matching surface distance information, namely the thickness information of the coating after the coating is coated, from a coating database through the detected data.

And S802, feeding back painting information according to the comparison condition between the current paint distance information and the surface distance information.

Actual paint thickness information is obtained by subtracting the current paint distance information from the surface distance information and compared.

Step S803, feeding back smearing information including over-thick information, over-thin information, missing information and qualified information;

When the detection is carried out, a plurality of positions on the plane are synchronously detected, so that the accuracy is improved.

In the comparison process, once the thickness of the painted coating is calculated to be larger than the reference coating thickness, the over-thickness information is fed back. Once the applied paint thickness is calculated to be less than the reference paint thickness, the over-thinning information is fed back.

When the over-thick information or the over-thin information is received, the opening and closing angles of the first electric gate and the second electric gate can be corrected through the over-thick information by a worker.

And once the thickness of the painted coating is calculated to be consistent with the thickness of the standard coating or contained in an error interval, qualified information is fed back without correction.

And feeding back missing information once the current paint distance information is smaller than the surface distance information or the current paint distance information is larger than the surface distance information one or more times in the calculation process. The condition of protrusion and depression, which is the problem of paint or the problem of the micro-concave roller, appears, and the loss is reduced by informing the worker through missing information.

Based on the same inventive concept, embodiments of the present invention provide a storage medium, which can be loaded and executed by a processor, including steps in the flowcharts of fig. 1-8.

Computer storage media include, for example: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

Based on the same inventive concept, the embodiment of the invention provides a micro-concave coating weight control device based on a lithium battery, which comprises: a processor for loading and executing a set of instructions; and the storage medium described above.

It will be clear to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional modules is merely used as an example, and in practical applications, the above function distribution may be performed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to perform all or part of the above described functions. For the specific working processes of the system, the apparatus and the unit described above, reference may be made to the corresponding processes in the foregoing method embodiments, and details are not described here again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, a module or a unit may be divided into only one logical function, and may be implemented in other ways, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

Units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, a network device, or the like) or a processor (processor) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: u disk, removable hard disk, read only memory, random access memory, magnetic or optical disk, etc. for storing program codes.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. A method for controlling the coating weight of a dimple based on a lithium battery is characterized by comprising the following steps:

acquiring current pressure detection information of a discharge port;

controlling the opening and closing angle of an electric gate preset at the discharge port according to the comparison condition between the current pressure detection information and the preset pressure reference value;

the method comprises the following steps:

calculating an average value of the first pressure information and the second pressure information to obtain pressure detection information;

the method comprises the following steps:

acquiring current time information;

if the opening and closing angle is adjusted to be larger than the response opening and closing angle, the angle exceeding the response opening and closing angle is adjusted by the compensation angle of the lazy electric gate;

further comprising:

acquiring current temperature information of the paint in the material box;

preheating wires are also preset on the micro-concave rollers, and the preheating wires are heated when the micro-concave rollers rotate;

the method comprises the following steps:

acquiring current environment temperature information;

searching out the compensation temperature from a pre-stored temperature compensation database according to the current environment temperature information, and increasing the heating temperature of the heating wire;

the method comprises the following steps:

2. The method for controlling the coating amount of the lithium battery based on the dimple of claim 1, wherein: the method comprises the following steps:

controlling the indication of a preset block-shaped indicator light according to the comparison relationship between the first pressure information and the second pressure information and the preset pressure impact information;

3. The method for controlling the coating amount of the lithium battery based on the dimple of claim 1, wherein: the method comprises the following steps:

4. A storage medium, characterized by: a program capable of being loaded and executed by a processor to implement the lithium battery-based dimple coating weight control method according to any one of claims 1 to 3.

5. A dimple coating amount control device based on a lithium battery is characterized in that: the method comprises the following steps:

a processor for loading and executing a set of instructions; and

the storage medium of claim 4.