CN116242136B - Lithium battery electrode sintering roller kiln - Google Patents
Lithium battery electrode sintering roller kiln Download PDFInfo
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- CN116242136B CN116242136B CN202310198422.3A CN202310198422A CN116242136B CN 116242136 B CN116242136 B CN 116242136B CN 202310198422 A CN202310198422 A CN 202310198422A CN 116242136 B CN116242136 B CN 116242136B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
- F27B9/20—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
- F27B9/38—Arrangements of devices for charging
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
- F27B9/40—Arrangements of controlling or monitoring devices
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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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention relates to the technical field of electrode sintering, and particularly discloses a lithium battery electrode sintering roller kiln, which comprises a kiln body and a structural structure adjusting assembly, wherein the kiln body comprises a temperature adjusting assembly, and the temperature adjusting assembly is used for improving the uniformity of a roller kiln temperature field; the kiln body comprises a roller and a gas collection cleaning device, and the gas collection cleaning device is used for cleaning the roller and improving the fitting degree between the kiln body and the roller in the sintering process of the lithium battery electrode; the gas collection cleaning device comprises a gas collection cleaning box body and a gas collection cleaning gate, the gas collection cleaning box body is connected with a second control valve, the structure adjusting assembly comprises a roll gap adjusting assembly and a gate adjusting assembly, the roll gap adjusting assembly is used for adjusting the distance between rollers, and the gate adjusting assembly is used for adjusting the gas collection cleaning device.
Description
Technical Field
The invention relates to the technical field of electrode sintering, in particular to a lithium battery electrode sintering roller kiln.
Background
In the industrial field, equipment cost management is crucial to production and management units, the cycle life of a lithium battery is long, the replacement cost can be effectively reduced, in addition, when the production and manufacturing equipment is produced, the occupied space of the battery is often considered, the smaller the occupied area of the battery is, the more space can be released for the production and manufacturing equipment, the utilization rate of the equipment space is improved, and under the 'double carbon' target, each production and management unit is towards green low-carbonization transformation, the lead-acid battery contains heavy metal lead, strong acid and the like, serious pollution to the atmosphere, water body and soil can be caused, the lithium battery does not contain the elements, the environmental friendliness is stronger, and the application range and the demand of the lithium battery are wider under the double effects of actual production and environmental protection.
The performance of the lithium battery is particularly important in the daily use process, and the forming quality of the lithium battery as the electrode of the lithium battery core plays a vital role in the use performance of the lithium battery, and the advanced electrode preparation process can not only improve the electrochemical performance of the battery, but also reduce the economic cost, improve the energy efficiency of the battery and reduce the adverse effect on the environment.
The preparation process of the electrode of the lithium ion battery generally comprises four steps of electrode slurry preparation, coating, electrode drying forming and rolling, wherein the electrode drying is generally formed by adopting a roller kiln for sintering, the forming temperature set in the roller kiln body, the uniformity of a temperature field, the cleanliness of a roller, the stability of the bonding operation of the electrode of the lithium ion battery and a roller table of the roller and the like in the sintering process have important influences on the electrode drying forming, and the defects of electrode pollution, electrode cracks, uneven electrode diffusion and the like affecting the quality of a product in the electrode drying forming process are often related to the influence factors, especially the defects of electrode cracks, uneven electrode diffusion and the like in the temperature field uniformity, the stability of the bonding operation of the electrode of the lithium battery and the roller table and the like are important, so that the improvement of the forming environment of the roller kiln of the electrode is an important way for improving the forming quality of the electrode, and the popularization and the application of the lithium ion battery are significant.
Disclosure of Invention
The invention aims to provide a lithium battery electrode sintering roller kiln, which solves the following technical problems:
how to improve the forming environment of the lithium battery electrode sintering roller kiln and improve the forming quality of the lithium battery electrode.
The aim of the invention can be achieved by the following technical scheme:
the roller kiln comprises a kiln body and a structural structure adjusting component, wherein the kiln body comprises a temperature adjusting component, and the temperature adjusting component is used for improving the uniformity of a roller kiln temperature field;
the kiln body comprises a roller and a gas collection cleaning device, wherein the gas collection cleaning device is used for cleaning the roller and generating longitudinal air pressure difference in the sintering process of the lithium battery electrode;
the structure adjusting assembly comprises a roller spacing adjusting assembly and a gate adjusting assembly, wherein the roller spacing adjusting assembly is used for adjusting the roller spacing, and the gate adjusting assembly is used for adjusting the gas collection cleaning device.
In an embodiment, the gas collection cleaning device comprises a gas collection cleaning box body and a gas collection cleaning gate, wherein the gas collection cleaning box body is connected with a second control valve, and the second control valve is used for adjusting the gas flow of the gas collection cleaning device;
the second control valve is connected with a reverse adjusting assembly, the reverse adjusting assembly comprises a return pipe and a third control valve, and the return pipe and the third control valve are used for adjusting the uniformity of a roller kiln temperature field;
the gate adjusting assembly comprises a gate adjusting device and a gate adjusting connecting rod, the gate adjusting device is connected with an adjusting device through threads, the gate adjusting connecting rod is connected with the gas collecting cleaning gate, and the adjusting device is used for adjusting the size of a gas collecting cleaning box body and a gas collecting cleaning gate cleaning gas port;
the gate adjusting device is connected with a first adjusting scale, and the first adjusting scale is used for accurately adjusting the size of the cleaning air port.
In an embodiment, the roll gap adjusting assembly comprises a roll gap adjusting device and a roll gap adjusting sliding block, and the roll gap adjusting device is connected with the roll gap adjusting sliding block;
the kiln body is provided with a slide block guide rail, the roll gap adjusting slide block is in sliding connection with the kiln body, and the roll gap adjusting device and the roll gap adjusting slide block adjust the roll gap under the action of the adjusting device;
the kiln body is provided with a second adjusting scale, and the second adjusting scale is used for accurately adjusting the distance between the rollers.
In an embodiment, the temperature regulation assembly includes a control valve, a temperature regulation device is connected to the control valve, the temperature regulation device includes exhaust gate and pneumatic impeller, temperature regulation assembly and temperature regulation device are arranged in promoting the temperature field degree of consistency S of lithium cell electrode sintering in the roller kiln, the acquisition mode of temperature field degree of consistency S is:
S＝δ*f t [V s /(T d *ψ)]
wherein delta is the uniformity coefficient, f t () As a temperature field influence function under the current environmental parameters, V s For the temperature field gas flow velocity value, T d Is the average value of the temperature difference in the roller kiln, and psi is the average value of the moisture content in the roller kiln.
In one embodiment, the temperature adjusting component and the reverse adjusting component have a gas flow velocity value and a temperature field gas flow velocity value V s The following relationship exists;
V s ＝V s1 +V s3
wherein V is s1 Is the air flow velocity value of the first control valve, V s3 Is the airflow velocity value of the third control valve.
In an embodiment, the lamination stability P of the lithium battery electrode and the roller table in the sintering process is adjusted by a second control valve, and the obtaining manner is as follows:
wherein sigma is the flow velocity stability coefficient, V s2 The airflow speed value of the second control valve is delta A, the flow speed uniform distribution value is delta A, k is a gravity stability coefficient, L 0 G (l) is a gravity function of unit length of the lithium battery electrode, and delta B is a gravity uniform distribution value;
the uniform flow velocity distribution value delta A is as follows:
wherein V is s2min The minimum airflow speed value of the second control valve is V s2max The maximum airflow velocity value is the airflow velocity value of the two control valves;
the gravity uniform distribution value delta B is as follows:
wherein L is min For minimum distance between rollers, L max Maximum spacing for the rollers;
the cleanliness N of the roller is regulated by a second control valve in the sintering process, and the acquisition mode is as follows:
N＝τ*f n (V s2 )
wherein τ is the cleanliness factor, f n () Adjusting the function for cleanliness under current environmental parameters，V s2 The air flow speed of the second control valve;
the uniformity of the temperature field influences the quality factor eta of electrode sintering of the lithium battery;
the quality factor eta of the lithium battery electrode sintering is also related to the set temperature T of the roller kiln, the cleanliness N of the roller rod and the laminating stability P of the lithium battery electrode and the roller way in the sintering process, and the acquisition mode is as follows:
η＝ε*f q [S*(P+N)]+φ*f e (T)
wherein epsilon is a quality factor coefficient, phi is a temperature quality coefficient, f q () For the quality adjustment function under the current environmental parameters, f e () Is a temperature quality function under the current environmental parameters.
In one embodiment, the third control valve airflow velocity value V s3 Is controlled by the second control valve air flow velocity value V s2 The acquisition mode of the regulation is as follows:
V s2 ＝θ*V s3
where θ is the airflow rate scaling factor.
In one embodiment, when determining the quality factor eta of the electrode sintering of the lithium battery, the quality factor eta is compared with a preset quality factor threshold eta t Comparison:
if eta is greater than or equal to eta t Judging that the quality factor is normal;
if eta<η t Judging that the quality factor is abnormal;
through the first control valve air flow velocity value V s1 Second control valve air flow velocity value V s2 Adjusting the uniformity S of a temperature field, the set temperature T of a roller kiln, the cleanliness N of a roller rod and the attaching stability P of a lithium battery electrode and a roller way in the sintering process, and further adjusting the quality factor eta so that the quality factor eta meets eta more than or equal to eta t 。
The invention has the beneficial effects that:
(1) According to the invention, the forming environment of the lithium battery electrode sintering roller kiln is improved, so that the forming quality of the roller kiln on the lithium battery electrode is improved.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a schematic view of the overall structure of a roller kiln according to the invention;
FIG. 2 is a schematic view of the internal structure of the roller kiln according to the invention;
FIG. 3 is a cross-sectional view of a roller kiln according to the invention;
FIG. 4 is a schematic view of the outer construction of the roller kiln adjustment assembly of the present invention;
FIG. 5 is a cross-sectional view of a roller kiln gas collection cleaning device and rollers of the present invention;
FIG. 6 is an enlarged view of a partial structure at A in FIG. 3 according to the present invention;
FIG. 7 is a schematic view of the inside construction of the roller kiln adjustment assembly of the present invention;
FIG. 8 is a cross-sectional view of a kiln body slider rail of the roller kiln adjustment assembly of the present invention;
fig. 9 is a partial cross-sectional view of a roller kiln temperature regulating device according to the invention.
Reference numerals: 1. a kiln body; 2. a structural adjustment assembly; 3. a roller; 4. a gas collection cleaning device; 401. a gas collection cleaning box body; 402. a gas collection cleaning gate; 5. a roll gap adjustment assembly; 501. a roll gap adjusting device; 502. a roll gap adjusting slide block; 503. a slider guide rail; 6. a gate adjustment assembly; 601. a gate adjusting device; 602. a gate adjusting link; 7. an adjusting device; 8. a first adjustment scale; 9. a second adjustment scale; 10. a second control valve; 11. a temperature regulating assembly; 1101. a first control valve; 12. a temperature adjusting device; 1201. an exhaust gate; 1202. a pneumatic impeller; 13. a reverse adjustment assembly; 1301. a return pipe; 1302. and a third control valve.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-4, in one embodiment, a lithium battery electrode sintering roller kiln is provided, the roller kiln includes a kiln body 1 and a structural structure adjusting component 2, the kiln body 1 includes a temperature adjusting component 11, and the temperature adjusting component 11 is used for improving uniformity of a roller kiln temperature field;
the kiln body 1 comprises a roller 3 and a gas collection cleaning device 4, wherein the gas collection cleaning device 4 is used for cleaning the roller 3 and improving the fitting degree between the kiln body and the roller 3 in the sintering process of the lithium battery electrode;
the structure adjusting assembly 2 comprises a roller spacing adjusting assembly 5 and a gate adjusting assembly 6, wherein the roller spacing adjusting assembly 5 is used for adjusting the distance between the rollers 3, and the gate adjusting assembly 6 is used for adjusting the gas collecting cleaning device 4.
In the above technical scheme, under the effect of structure adjusting part 2, promote roller kiln temperature field's degree of consistency through temperature adjusting part 11, promote clean roller 3's cleanliness factor and lithium cell electrode sintering in-process with roller 3's laminating degree through gas collecting cleaning device 4, and then improved lithium cell electrode sintering roller kiln's shaping environment, promoted lithium cell electrode's shaping quality.
As an embodiment of the present invention, referring to fig. 4 to 7, the gas collecting and cleaning device 4 includes a gas collecting and cleaning tank 401 and a gas collecting and cleaning gate 402, the gas collecting and cleaning tank 401 is connected with a second control valve 10, and the second control valve 10 is used for adjusting the gas flow of the gas collecting and cleaning device 4;
the second control valve 10 is connected with a reverse adjusting assembly 13, the reverse adjusting assembly 13 comprises a return pipe 1301 and a third control valve 1302, and the return pipe 1301 and the third control valve 1302 are used for adjusting the uniformity of a roller kiln temperature field;
the gate adjusting assembly 6 comprises a gate adjusting device 601 and a gate adjusting connecting rod 602, the gate adjusting device 601 is in threaded connection with an adjusting device 7, the gate adjusting connecting rod 602 is connected with the gas collecting cleaning gate 402, and the adjusting device 7 is used for adjusting the size of a cleaning gas port of the gas collecting cleaning tank 401 and the gas collecting cleaning gate 402;
the gate adjusting device 601 is connected with a first adjusting scale 8, and the first adjusting scale 8 is used for accurately adjusting the size of the cleaning air port.
In the technical scheme, the second control valve 10 is used for adjusting the gas flow of the gas collection cleaning device 4, so that the cleaning capability of the gas collection cleaning device 4 on the roller 3 is adjusted, the degree of fit between the gas collection cleaning device and the roller 3 in the sintering process of the lithium battery electrode is adjusted, and the applicability of the roller kiln to the sintering molding requirements of different lithium battery electrodes is further enhanced; in addition, under the action of the return pipe 1301 and the third control valve 1302, the stability of the bonding between the electrode of the lithium battery and the roller 3 in the sintering process is improved, and meanwhile, the uniformity of the roller kiln temperature field is enhanced; under the action of the gate adjusting assembly 6 and the first adjusting scale 8, fine adjustment of the size of the cleaning air port of the air collecting cleaning box 401 and the air collecting cleaning gate 402 is realized.
As an embodiment of the present invention, referring to fig. 4 to 8, the roll gap adjusting assembly 5 includes a roll gap adjusting device 501 and a roll gap adjusting slider 502, where the roll gap adjusting device 501 is connected to the roll gap adjusting slider 502;
the kiln body 1 is provided with a slide block guide rail 503, the roll gap adjusting slide block 502 is in sliding connection with the kiln body 1, and the roll gap adjusting device 501 and the roll gap adjusting slide block 502 adjust the distance between the rollers 3 under the action of the adjusting device 7;
the kiln body 1 is provided with a second adjusting scale 9, and the second adjusting scale 9 is used for accurately adjusting the distance between the rollers 3.
In the above technical scheme, through the arrangement of the roller spacing adjusting component 5 and the second adjusting scale 9, under the action of the roller spacing adjusting slide block 502 and the slide block guide rail 503, the fine adjustment of the distance between the rollers 3 of the roller kiln is realized, and the requirement of adjusting the distance between the rollers 3 in the sintering and forming process of different lithium battery electrode materials is met.
As an embodiment of the present invention, referring to fig. 3 and 9, the temperature adjusting assembly 11 includes a first control valve 1101, the first control valve 1101 is connected to a temperature adjusting device 12, the temperature adjusting device 12 includes an exhaust gate 1201 and a pneumatic impeller 1202, the temperature adjusting assembly 11 and the temperature adjusting device 12 are used for improving a temperature field uniformity S of sintering a lithium battery electrode in a roller kiln, and the temperature field uniformity S is obtained by:
S＝δ*f t [V s /(T d *ψ)]
wherein delta is the uniformity coefficient, f t () As a temperature field influence function under the current environmental parameters, V s For the temperature field gas flow velocity value, T d Is the average value of the temperature difference in the roller kiln, and psi is the average value of the moisture content in the roller kiln.
In the above technical solution, by arranging the first control valve 1101 and the temperature adjusting device 12, under the action of the exhaust gate 1201 and the pneumatic impeller 1202, the temperature field uniformity S of sintering the lithium battery electrode in the roller kiln is improved.
In the process of adjusting the uniformity S of the temperature field, a temperature difference average value table in the roller kiln and a temperature difference average value T in the roller kiln under corresponding conditions can be obtained by carrying out temperature field uniformity test on the roller kiln for a limited number of times d And the average value psi of the moisture content of the roller kiln, in addition, V s The temperature field gas flow velocity value can be obtained by the existing sensor arranged in the roller kiln; f (f) t () Is a temperature field influence function under the current environment parameter, and is based on the air flow velocity value V under the current environment parameter s Average T of temperature difference in kiln d Determining a kiln moisture content mean value psi; delta is uniformity coefficient, uniformity coefficient tables of the roller kiln at different working temperatures are obtained through tests, and the uniformity coefficient tables are selected.
As an embodiment of the present invention, referring to fig. 3 and 6, the temperature adjusting assembly 11 and the reverse adjusting assembly 13 have a gas flow velocity value and a temperature field gas flow velocity value V s The following relationship exists;
V s ＝V s1 +V s3
wherein V is s1 Is the air flow velocity value of the first control valve 1101, V s3 Is the airflow rate value of the third control valve 1302.
In the above technical solution, by arranging the temperature adjusting assembly 11 and the reverse adjusting assembly 13, the air velocity value V s Satisfies the uniformity of the temperature fieldIn the case of S requirement, the air flow velocity value V is controlled by the third control valve 1302 s3 Reducing the air flow velocity value V of the first control valve 1101 s1 Thereby reducing the air flow velocity value V of the first control valve 1101 s1 And the influence of the temperature field uniformity S on the bonding degree of the lithium battery electrode and the roller way is regulated.
As an embodiment of the present invention, referring to fig. 3 and 5, the lamination stability P of the electrode of the lithium battery and the roller table in the sintering process is adjusted by the second control valve 10, and the following obtaining manner is adopted:
wherein sigma is the flow velocity stability coefficient, V s2 For the air flow velocity value of the second control valve 10, ΔA is the uniform flow velocity value, k is the gravity stability coefficient, L 0 G (l) is a gravity function of unit length of the lithium battery electrode, and delta B is a gravity uniform distribution value;
the uniform flow velocity distribution value delta A is as follows:
wherein V is s2min The minimum airflow velocity value, V, is the airflow velocity value of the second control valve 10 s2max The maximum air flow speed value is the air flow speed value of the two control valves 10;
the gravity uniform distribution value delta B is as follows:
wherein L is min For the minimum spacing of the rollers 3, lmax is the maximum spacing of the rollers 3;
in the process of adjusting the lamination stability P of the lithium battery electrode and the roller table, the flow velocity stability coefficient σ and the gravity stability coefficient k respectively represent the air flow velocity value V of the second control valve 10 s2 And lithium batteryPolar roll gap length gravityInfluence weight of lamination stability P of lithium battery electrode and roller way is obtained by adopting control test in advance to obtain weight data table of sigma and k, and air flow velocity value V is combined s2 Electrode roll gap length gravity->Selecting from a data table, wherein the gravity function G (l) of the unit length of the lithium battery electrode is determined by the electrode components of the lithium battery formed by sintering;
the cleanliness N of the roller is regulated by the second control valve 10 in the sintering process, and the acquisition mode is as follows:
N＝τ*f n (V s2 )
wherein τ is the cleanliness factor, f n () For the cleanliness adjusting function under the current environmental parameters, V s2 The air flow rate for the second control valve 10;
in the process of adjusting the cleanliness N of the roller in the sintering process, the cleanliness coefficient table is obtained through tests under the condition of different air flow speeds of the second control valve 10, and the cleanliness adjusting function f is selected from the cleanliness coefficient table n () According to the air flow velocity V of the second control valve 10 s2 Determining the air flow velocity V of the second control valve 10 s2 Obtained by means of existing sensors arranged.
The temperature field uniformity S influences the quality factor eta of sintering of the lithium battery electrode;
the quality factor eta of the lithium battery electrode sintering is also related to the temperature T of a roller kiln, the cleanliness N of a roller rod and the laminating stability P of the lithium battery electrode and a roller way in the sintering process, and the lithium battery electrode sintering quality factor eta is obtained by the following steps:
η＝ε*f q [S*(P+N)]+φ*f e (T)
wherein epsilon is a quality factor coefficient, phi is a temperature quality coefficient, f q []For the quality adjustment function under the current environmental parameters, f e () Is a temperature quality function under the current environmental parameters.
In the influence process of the sintering quality factor eta of the lithium battery electrode, the quality factor epsilon represents the influence weight of the temperature field uniformity S, the cleanliness N of the roller rod and the bonding stability P of the lithium battery electrode and the roller way on the quality factor eta, the temperature quality factor phi represents the influence weight of the roller way kiln temperature T on the quality factor eta, a control variable test is adopted in advance to obtain a weight data table of epsilon and phi, and the weight data table is selected for use; mass adjustment function f q []Determining according to the uniformity S of the temperature field, the attaching stability P of the roller way and the cleanliness N of the roller rod; temperature mass function f e () Determining according to the temperature T of the roller kiln; the temperature field uniformity S, the cleanliness N of the roller rod and the attaching stability P of the lithium battery electrode and the roller way are obtained according to the adjusting process; temperature mass function f e () And determining according to the currently set roller kiln temperature T, wherein the roller kiln temperature T is acquired by a temperature sensor arranged in the roller kiln.
As an embodiment of the present invention, referring to fig. 6, the third control valve 1302 has an airflow velocity V s3 Is subject to the value V of the velocity of the air flow of the second control valve 10 s2 The acquisition mode of the regulation is as follows:
V s2 ＝θ*V s3
where θ is the airflow rate scaling factor.
It should be noted that the air flow rate scaling factor θ > 1 causes the air flow rate value V of the second control valve 10 s2 While improving the bonding stability P of the lithium battery electrode and the roller way and the cleanliness N of the roller rod, the airflow speed value V of the third control valve 1302 is increased s3 And compensating the temperature field uniformity S.
As an embodiment of the present invention, referring to fig. 3, when determining the quality factor η of the sintering of the lithium battery electrode, the quality factor η is compared with a preset quality factor threshold value η t Comparison:
if eta is greater than or equal to eta t Judging that the quality factor is normal;
if eta<η t Judging that the quality factor is abnormal;
airflow velocity value V through first control valve 1101 s1 First, aTwo control valves 10 air velocity value V s2 Adjusting the uniformity S of a temperature field, the temperature T of a roller kiln, the cleanliness N of a roller rod and the bonding stability P of a lithium battery electrode and a roller way in the sintering process, and further adjusting the quality factor eta so that the quality factor eta meets eta more than or equal to eta t 。
In the technical scheme, the quality factor eta is compared with the preset quality factor threshold eta t Judgment of lithium battery electrode quality factor eta is carried out, and the air flow speed value V of the first control valve 1101 is passed s1 Second control valve 10 air velocity value V s2 And adjusting the uniformity S of the temperature field, the temperature T of the roller kiln, the cleanliness N of the roller rod and the attaching stability P of the lithium battery electrode and the roller way in the sintering process, so as to improve the forming quality of the lithium battery electrode.
The working principle of the invention is as follows: under the action of the structure adjusting component 2, the uniformity S of the roller kiln temperature field is improved through the temperature adjusting component 11, and the air flow speed value V is obtained through the arrangement of the temperature adjusting component 11 and the reverse adjusting component 13 s In the case of meeting the temperature field uniformity S requirement, the air flow velocity value V of the first control valve 1101 is lowered s1 Thereby reducing the air flow velocity value V of the first control valve 1101 s1 Due to the influence of the uniformity S of the temperature field on the bonding degree of the lithium battery electrode and the roller way, the airflow speed value V of the second control valve 10 is adjusted s2 While improving the bonding stability P of the lithium battery electrode and the roller way and the cleanliness N of the roller rod, the airflow speed value V of the third control valve 1302 is increased s3 The uniformity S of the temperature field is compensated, so that the uniformity of the temperature field of the roller kiln is reversely enhanced; the gas flow of the gas collection cleaning device 4 is regulated through the second control valve 10, the cleaning capacity of the gas collection cleaning device 4 to the roller 3 is regulated, the adjustment of the bonding degree between the gas collection cleaning device 4 and the roller 3 in the sintering process of lithium battery electrodes is realized, the applicability of the roller kiln to sintering molding requirements of different lithium battery electrodes is enhanced, under the action of the gate regulating component 6 and the first regulating scale 8, the size of a cleaning gas port of the gas collection cleaning box 401 and the gas collection cleaning gate 402 is finely regulated, and under the action of the roller spacing regulating component 5 and the second regulating scale 9, the roller 3 spacing of the roller kiln is realized under the action of the roller spacing regulating slide block 502 and the slide block guide rail 503Fine adjustment meets the requirements of adjusting the distance between the rollers 3 in the sintering and forming process of different lithium battery electrode materials, and the quality factor eta is compared with a preset quality factor threshold eta t Judgment of lithium battery electrode quality factor eta is carried out, and the air flow speed value V of the first control valve 1101 is passed s1 Second control valve 10 air velocity value V s2 The temperature field uniformity S, the roller kiln temperature T, the cleanliness N of the roller rod and the laminating stability P of the lithium battery electrode and the roller way in the sintering process are adjusted, so that the forming environment of the lithium battery electrode sintering roller kiln is improved, and the forming quality of the lithium battery electrode is improved.
The foregoing describes one embodiment of the present invention in detail, but the description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the invention. All equivalent changes and modifications within the scope of the present invention are intended to be covered by the present invention.
Claims (8)
1. The lithium battery electrode sintering roller kiln is characterized by comprising a kiln body (1) and a structure adjusting assembly (2), wherein the kiln body (1) comprises a temperature adjusting assembly (11), and the temperature adjusting assembly (11) is used for improving the uniformity of a roller kiln temperature field;
the kiln body (1) comprises a roller (3) and a gas collection cleaning device (4), wherein the gas collection cleaning device (4) is used for cleaning the roller (3) and generating longitudinal air pressure difference in the sintering process of the lithium battery electrode;
the structure adjusting assembly (2) comprises a roller spacing adjusting assembly (5) and a gate adjusting assembly (6), wherein the roller spacing adjusting assembly (5) is used for adjusting the distance between rollers (3), and the gate adjusting assembly (6) is used for adjusting the gas collecting cleaning device (4);
the method comprises the steps of obtaining temperature field uniformity S, roller kiln set temperature T, roller cleanliness N and bonding stability P of a lithium battery electrode and a roller way in a sintering process, judging a sintering quality factor eta of the lithium battery electrode according to the obtained parameters, and judging a product state according to the sintering quality factor eta of the lithium battery electrode.
2. The lithium battery electrode sintering roller kiln according to claim 1, wherein the gas collection cleaning device (4) comprises a gas collection cleaning box body (401) and a gas collection cleaning gate (402), the gas collection cleaning box body (401) is connected with a second control valve (10), and the second control valve (10) is used for adjusting the gas flow of the gas collection cleaning device (4);
the second control valve (10) is connected with a reverse regulation component (13), the reverse regulation component (13) comprises a return pipe (1301) and a third control valve (1302), and the return pipe (1301) and the third control valve (1302) are used for regulating the uniformity of a roller kiln temperature field;
the gate adjusting assembly (6) comprises a gate adjusting device (601) and a gate adjusting connecting rod (602), the gate adjusting device (601) is in threaded connection with an adjusting device (7), the gate adjusting connecting rod (602) is connected with the gas collecting cleaning gate (402), and the adjusting device (7) is used for adjusting the size of a cleaning gas port of the gas collecting cleaning box body (401) and the gas collecting cleaning gate (402);
the gate adjusting device (601) is connected with a first adjusting scale (8), and the first adjusting scale (8) is used for accurately adjusting the size of the cleaning air port.
3. The lithium battery electrode sintering roller kiln according to claim 1, characterized in that the roller spacing adjusting assembly (5) comprises a roller spacing adjusting device (501) and a roller spacing adjusting slide block (502), and the roller spacing adjusting device (501) is connected with the roller spacing adjusting slide block (502);
the kiln body (1) is provided with a slide block guide rail (503), the roll gap adjusting slide block (502) is in sliding connection with the kiln body (1), and the roll gap adjusting device (501) and the roll gap adjusting slide block (502) adjust the distance between the rollers (3) under the action of the adjusting device (7);
the kiln body (1) is provided with a second adjusting scale (9), and the second adjusting scale (9) is used for accurately adjusting the distance between the rollers (3).
4. The lithium battery electrode sintering roller kiln according to claim 1, wherein the temperature adjusting component (11) comprises a first control valve (1101), the first control valve (1101) is connected with a temperature adjusting device (12), the temperature adjusting device (12) comprises an exhaust gate (1201) and a pneumatic impeller (1202), the temperature adjusting component (11) and the temperature adjusting device (12) are used for improving the temperature field uniformity S of sintering of the lithium battery electrode in the roller kiln, and the temperature field uniformity S is obtained by:
S＝δ*f t [V s /(T d *ψ)]
wherein delta is the uniformity coefficient, f t () As a temperature field influence function under the current environmental parameters, V s For the temperature field gas flow velocity value, T d Is the average value of the temperature difference in the roller kiln, and psi is the average value of the moisture content in the roller kiln.
5. The lithium battery electrode sintering roller kiln according to claim 4, characterized in that the air flow speed value and the temperature field air flow speed value V of the temperature adjusting component (11) and the reverse adjusting component (13) s The relation of (2) is:
V s ＝V s1 +V s3
wherein V is s1 Is the air flow velocity value of the first control valve (1101), V s3 Is the airflow velocity value of the third control valve (1302).
6. The lithium battery electrode sintering roller kiln according to claim 4, wherein the lamination stability P of the lithium battery electrode and the roller table in the sintering process is regulated by a second control valve (10), and the obtaining mode is as follows:
wherein sigma is the flow velocity stability coefficient, V s2 Is the airflow velocity value of the second control valve (10), delta A is the uniform flow velocity value, k is the gravity stability coefficient, L 0 G (l) is a gravity function of unit length of the lithium battery electrode, and delta B is a gravity uniform distribution value;
the uniform flow velocity distribution value delta A is as follows:
wherein V is s2min Is the minimum airflow velocity value of the second control valve (10), V s2max The maximum airflow velocity value is the airflow velocity value of the two control valves (10);
the gravity uniform distribution value delta B is as follows:
wherein L is min For the minimum spacing of the rollers (3), lmax is the maximum spacing of the rollers (3);
the cleanliness N of the roller is regulated by a second control valve (10) in the sintering process, and the acquisition mode is as follows:
N＝τ*f n (V s2 )
wherein τ is the cleanliness factor, f n () For the cleanliness adjusting function under the current environmental parameters, V s2 Is the air flow rate of the second control valve (10);
the uniformity of the temperature field influences the quality factor eta of electrode sintering of the lithium battery;
the quality factor eta of the lithium battery electrode sintering is also related to the set temperature T of the roller kiln, the cleanliness N of the roller rod and the laminating stability P of the lithium battery electrode and the roller way in the sintering process, and the acquisition mode is as follows:
n＝ε*f q [S*(P+N)]+φ*f e (T)
wherein epsilon is a quality factor coefficient, phi is a temperature quality coefficient, f q () For the quality adjustment function under the current environmental parameters, f e () Is a temperature quality function under the current environmental parameters.
7. The lithium battery electrode sintering roller kiln according to claim 5, characterized in that the third control valve (1302) has an air flow velocity value V s3 Is controlled by a second control valve (10) for the air flow velocity value V s2 The acquisition mode of the regulation is as follows:
V s2 ＝θ*V s3
where θ is the airflow rate scaling factor.
8. The lithium battery electrode sintering roller kiln according to claim 6, wherein when the quality factor eta of the lithium battery electrode sintering is judged, the quality factor eta is compared with a preset quality factor threshold eta t Comparison:
if eta is greater than or equal to eta t Judging that the quality factor is normal;
if eta<η t Judging that the quality factor is abnormal;
through a first control valve (1101) the velocity value V of the air flow s1 And a second control valve (10) air flow velocity value V s2 Adjusting the uniformity S of a temperature field, the set temperature T of a roller kiln, the cleanliness N of a roller rod and the attaching stability P of a lithium battery electrode and a roller way in the sintering process, and further adjusting the quality factor eta so that the quality factor eta meets eta more than or equal to eta t 。
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| CN216159608U (en) * | 2021-09-13 | 2022-04-01 | 湖南省醴陵市楚华陶瓷实业有限公司 | Roller kiln combustion system convenient to adjust temperature |
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| CN2410606Y (en) * | 2000-02-28 | 2000-12-13 | 华南理工大学 | Automatic speed regulator of transporting product for roller kiln |
| CN207095278U (en) * | 2017-08-17 | 2018-03-13 | 湖北瑞莱达机电设备有限公司 | A kind of driving roller kiln equipment |
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| CN209116743U (en) * | 2018-10-31 | 2019-07-16 | 信阳科美新型材料有限公司 | A kind of sintering integrated plate transmitting device of roller kilns insulation and decoration |
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