Drying equipment and control method and control device thereof

Abstract

The invention discloses drying equipment and a control method and device thereof. The drying equipment is used for drying the pole piece. The control method of the drying equipment comprises the steps that the first actual measurement concentration of target gas in all drying ovens of the drying equipment is obtained; according to the obtained first actual measurement concentration of the target gas in each drying oven, the opening degree of an air inlet valve and an air exhaust valve of each drying oven is adjusted, the air inlet valves are used for controlling air inlet of the drying ovens, and the air exhaust valves are used for controlling air exhaust of the drying ovens; acquiring a second actual measurement concentration of the target gas in each drying oven after being adjusted by the air inlet valve and the air exhaust valve; and according to the second actually-measured concentration of the multiple drying ovens, the rotating speed of a total air inlet fan of the drying equipment is adjusted. According to the invention, the adjustment efficiency of the concentration of the target gas in the plurality of ovens can be improved, and the production safety and the energy consumption reduction are balanced.

Description

Technical Field

[0001] The present application belongs to the field of battery technology, and in particular relates to a drying device and a control method and a control device thereof. Background Art

[0002] The battery manufacturing process includes many steps, such as stirring, coating, cold pressing, slitting, die cutting, winding, etc. In the coating process, the battery pole piece usually needs to be dried by drying equipment, and the energy consumption of the coating process far exceeds that of other processes. How to reduce the energy consumption of the coating process under the premise of safety is the research direction of this field. Summary of the invention

[0003] The embodiments of the present application provide a drying device and a control method and a control device thereof, which can achieve a balance between production safety and energy saving and consumption reduction.

[0004] According to the first aspect of the present application, the present application provides a control method for a drying device, and the drying device is used to dry electrodes. The control method for the drying device includes: obtaining a first measured concentration of a target gas in each oven of the drying device; adjusting the opening of an air inlet valve and an air exhaust valve of each oven according to the obtained first measured concentration of the target gas in each oven, wherein the air inlet valve is used to control the air inlet of the oven, and the air exhaust valve is used to control the air exhaust of the oven; obtaining a second measured concentration of the target gas in each oven after adjustment by the air inlet valve and the air exhaust valve; and adjusting the speed of the total air inlet fan of the drying device according to the second measured concentration of multiple ovens.

[0005] The opening of the air inlet valve of each oven can affect the air intake of the oven, the opening of the exhaust valve of each oven can affect the exhaust volume of the oven, and the total air intake fan speed can affect the air intake of multiple ovens at the same time. Adjusting the air intake and exhaust volume of the oven can adjust the target gas concentration of the oven. The second measured concentration of the target gas after self-adjustment of multiple ovens can directly represent the overall air intake adjustment demand of multiple ovens. The embodiment of the present application first self-adjusts the concentration of the target gas in the oven through the air inlet valve and exhaust valve of each oven, and then adjusts the speed of the total air intake fan according to the second measured concentration of the target gas after self-adjustment of the multiple ovens, which can meet the overall adjustment demand of the air intake of multiple ovens, thereby adjusting the target gas concentration in each oven at the same time, which is beneficial to improve the adjustment efficiency of the target gas concentration in multiple ovens and achieve a balance between production safety and energy saving and consumption reduction.

[0006] In some embodiments, according to the first measured concentration of the target gas in each oven, the opening of the air inlet valve and the exhaust valve of each oven is adjusted, including: if the first measured concentration is greater than the upper limit of the target concentration range of the oven, the opening of the air inlet valve and the exhaust valve is increased; if the first measured concentration is less than the lower limit of the target concentration range, the opening of the air inlet valve and the exhaust valve is reduced. Increasing the opening of the air inlet valve and the exhaust valve can increase the air intake and exhaust volume of the oven, thereby diluting the target gas in the oven and increasing the discharge volume of the target gas, and can reduce the concentration of the target gas in the oven at a higher rate, which is conducive to improving the regulation efficiency and production safety. Reducing the opening of the air inlet valve and the exhaust valve can reduce the air intake and exhaust volume of the oven, even if the concentration of the target gas in the oven increases, it is not easy to cause safety hazards. In addition, reducing the air intake of the oven can reduce the heating energy consumption under the premise of production safety. Reducing the exhaust volume of the oven can reduce the heat loss of target gas recovery waste, which is conducive to energy saving.

[0007] In some embodiments, increasing the opening of the air inlet valve and the exhaust valve includes: increasing the opening of the air inlet valve and the exhaust valve at the same adjustment ratio; and / or reducing the opening of the air inlet valve and the exhaust valve includes: reducing the opening of the air inlet valve and the exhaust valve at the same adjustment ratio. The opening of the air inlet valve and the exhaust valve increases and / or decreases synchronously and in equal proportion, and the air intake and exhaust volume of the oven are kept in dynamic balance as a whole, which is conducive to reducing the influence of the opening adjustment of the air inlet valve and the exhaust valve on the pressure in the oven.

[0008] In some embodiments, the adjustment ratio of the opening of the air inlet valve is positively correlated with the absolute value of the difference between the first measured concentration and the target concentration threshold of the oven; the adjustment ratio of the opening of the exhaust valve is positively correlated with the absolute value of the difference between the first measured concentration and the target concentration threshold; wherein the target concentration threshold is within the target concentration range. The adjustment ratio of the opening of the air inlet valve and the exhaust valve matches the degree to which the first measured concentration of the target gas in the oven deviates from the target concentration range. The adjustment ratio of the opening of the air inlet valve and the exhaust valve can adapt to the adjustment rate of the air intake and exhaust volume required by the oven, reduce the risk of the concentration of the target gas in the oven fluctuating, and help improve production safety and the drying quality of the electrode.

[0009] In some embodiments, adjusting the speed of the total air inlet fan according to the second measured concentrations of the multiple ovens includes: calculating the concentration mean of the second measured concentrations of the multiple ovens; if the concentration mean is greater than the upper limit of the average concentration range, increasing the speed of the total air inlet fan; if the concentration mean is less than the lower limit of the average concentration range, reducing the speed of the total air inlet fan. Increasing the speed of the total air inlet fan can provide more air intake to the ovens, thereby reducing the concentration of the target gas in each oven, which is beneficial to increasing the adjustment speed of the target gas concentration and reducing safety risks. Reducing the speed of the total air inlet fan is beneficial to reducing the energy consumption of the total air inlet fan to resist wind resistance.

[0010] In some embodiments, the adjustment speed of the total air inlet fan is positively correlated with the absolute value of the difference between the concentration mean and the average concentration threshold, wherein the average concentration threshold is within the average concentration range. The adjustment speed of the total air inlet fan matches the degree to which the target gas concentration of the plurality of ovens as a whole deviates from the average concentration range. The adjustment speed of the total air inlet fan can adapt to the adjustment rate of the air inlet volume required by the plurality of ovens, and can also balance the energy consumption of the total air inlet fan, which is beneficial to energy saving.

[0011] In some embodiments, the control method further includes: obtaining a first measured negative pressure in each oven; and adjusting the speed of the exhaust fan of each oven according to the first measured negative pressure in each oven. The speed of the exhaust fan of each oven can affect the exhaust volume of the oven. Adjusting the exhaust volume of the oven can adjust the negative pressure of the oven, which is conducive to reducing the shaking during the drying process of the electrode, improving the drying quality of the electrode, and can also minimize the external discharge of the target gas, reduce safety risks, and reduce the energy consumption of the exhaust fan.

[0012] In some embodiments, the speed of the exhaust fan of each oven is adjusted according to the first measured negative pressure in each oven, including: if the first measured negative pressure is greater than the upper limit of the target negative pressure range, the speed of the exhaust fan is reduced; if the first measured negative pressure is less than the lower limit of the target negative pressure range, the speed of the exhaust fan is increased. Reducing the speed of the exhaust fan can reduce the exhaust volume of the oven, thereby appropriately increasing the negative pressure of the oven, which is beneficial to reducing the adverse effect of the negative pressure on the electrode. Increasing the speed of the exhaust fan can increase the exhaust volume of the oven (the target gas discharged by the exhaust fan needs to be recycled by the recovery system, and will not cause safety risks), increasing the negative pressure in the oven, which is beneficial to limit the leakage of the target gas and reduce safety risks.

[0013] In some embodiments, the speed of the exhaust fan is adjusted according to a constant first preset speed, thereby simplifying the logical operation process of adjusting the exhaust fan without affecting production safety and improving the response speed.

[0014] In some embodiments, the control method of the drying equipment further includes: obtaining the second measured negative pressure in each oven after adjustment by the exhaust fan; adjusting the speed of the total exhaust fan according to the second measured negative pressure of multiple ovens and / or the speed of the exhaust fans of multiple ovens. In this way, the overall adjustment requirements of multiple ovens for the exhaust volume can be met, so that the negative pressure in each oven can be adjusted at the same time, which is conducive to improving the negative pressure adjustment efficiency in multiple ovens, which can not only reduce the shaking of the electrode during the drying process and improve the drying quality of the electrode, but also minimize the leakage of the target gas to the outside, reduce safety risks, and balance the energy consumption of the total exhaust fan.

[0015] In some embodiments, the speed of the total exhaust fan is adjusted according to the second measured negative pressure of multiple ovens and / or the speed of the exhaust fans of multiple ovens, including: calculating the negative pressure average of the second measured negative pressure of multiple ovens; if the negative pressure average is greater than the upper limit of the average negative pressure range, reducing the speed of the total exhaust fan; if the negative pressure average is less than the lower limit of the average negative pressure range, increasing the speed of the total exhaust fan. Reducing the speed of the total exhaust fan can reduce the exhaust volume of the oven, which is beneficial to reducing the negative pressure in each oven, increasing the speed of negative pressure regulation, reducing the adverse effects on the pole piece and the energy consumption of the total exhaust fan. Increasing the speed of the total exhaust fan is beneficial to increasing the negative pressure in each oven, reducing the risk of target gas leakage to the outside, and improving production safety.

[0016] In some embodiments, the speed of the total exhaust fan is adjusted according to a constant second preset speed, thereby simplifying the logic operation process of adjusting the total exhaust fan without affecting production safety and improving the response speed.

[0017] According to the second aspect of the present application, an embodiment of the present application provides a control method for a drying equipment, and the drying equipment is used to dry electrodes; the control method for the drying equipment includes: obtaining a first measured negative pressure in each oven; adjusting the speed of the exhaust fan of each oven according to the obtained first measured negative pressure in each oven; obtaining the second measured negative pressure in each oven after adjustment by the exhaust fan; adjusting the speed of the total exhaust fan according to the second measured negative pressure of multiple ovens and / or the speed of the exhaust fans of multiple ovens.

[0018] According to the third aspect of the present application, an embodiment of the present application provides a control device for a drying device, and the control device for the drying device includes a first acquisition unit, a first control unit, and a second control unit. The first acquisition unit is used to obtain a first measured concentration of the target gas in each oven. The first control unit is used to control the opening of the air inlet valve and the exhaust valve of the oven according to the first measured concentration of the target gas in each oven, wherein the air inlet valve is used to control the air intake of the oven, and the exhaust valve is used to control the exhaust of the oven. The second control unit is used to control the speed of the total air intake fan according to the second measured concentration of the target gas in the multiple ovens adjusted by the air inlet valve and the exhaust valve; the first acquisition unit is also used to obtain the second measured concentration of the target gas in each oven after adjustment by the air inlet valve and the exhaust valve.

[0019] According to the fourth aspect of the present application, an embodiment of the present application provides a control device for a drying device, and the control device for the drying device includes a second acquisition unit, a third control unit and a fourth control unit. The second acquisition unit is used to obtain the first measured negative pressure in each oven. The third control unit is used to adjust the speed of the exhaust fan of each oven according to the first measured negative pressure in each oven. The fourth control unit is used to adjust the speed of the total exhaust fan according to the second measured negative pressure in the multiple ovens adjusted by the exhaust fan and / or the speed of the exhaust fans of the multiple ovens. The second acquisition unit is also used to obtain the second measured negative pressure in each oven after adjustment by the exhaust fan.

[0020] According to a fifth aspect of the present application, an embodiment of the present application provides a drying device, which includes a plurality of ovens, a total air inlet fan, a first detection component and a control device. The total air inlet fan is used to supply air to the plurality of ovens. The first detection component is used to obtain the measured concentration of the target gas in each oven. The control device includes a memory and a processor, the memory stores a computer program, and the processor is configured to execute the control method provided in any embodiment of the first aspect of the present application through the computer program.

[0021] In some embodiments, the first detection assembly includes a plurality of gas concentration detection devices, which are arranged in the exhaust branch of the oven and are used to detect the measured concentration of the target gas in the exhaust branch. The measured concentration of the target gas in the exhaust branch can represent the measured concentration of the target gas in the oven, which is conducive to reducing the influence of the negative pressure environment of the oven on the detection results and improving the detection accuracy.

[0022] In some embodiments, the drying device further comprises a main exhaust fan and a second detection component. The main exhaust fan is used to exhaust air from the plurality of ovens. The second detection component is used to obtain the measured negative pressure in each oven. Each oven further comprises an exhaust fan, which is used to exhaust air from the oven.

[0023] According to the sixth aspect of the present application, an embodiment of the present application provides a drying device, which includes multiple ovens, a total exhaust fan, a second detection component and a control device. Each oven includes an exhaust fan, which is used to exhaust air from the oven to the outside. The total exhaust fan is used to exhaust air from multiple ovens to the outside. The second detection component is used to obtain the measured negative pressure in each oven. The control device includes a memory and a processor, the memory stores a computer program, and the processor is configured to execute the control method provided in any embodiment of the second aspect of the present application through the computer program. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 It is a schematic diagram of the structure of the drying equipment provided in some embodiments of the present application.

[0026] Figure 2 It is a schematic flow chart of a control method for drying equipment provided in some embodiments of the present application.

[0027] Figure 3 It is a schematic flow chart of a control method for drying equipment provided in other embodiments of the present application.

[0028] Figure 4 It is a schematic flow chart of a control method for drying equipment provided in some other embodiments of the present application.

[0029] Figure 5 It is a schematic flow chart of a control method for drying equipment provided in some further embodiments of the present application.

[0030] Figure 6 It is a schematic structural block diagram of a control device for drying equipment provided in some embodiments of the present application.

[0031] Figure 7 It is a schematic structural block diagram of a control device for drying equipment provided in other embodiments of the present application.

[0032] Figure 8 It is a schematic structural block diagram of a part of the structure of the drying equipment provided in some embodiments of the present application.

[0033] In the attached figure: Drying equipment 1, pole piece 2; Oven 10, box body 11, circulation pipeline 12, circulation fan 13, heating device 14, exhaust fan 15, main air inlet fan 20, main air inlet pipeline 31, air inlet branch 32, main exhaust pipeline 33, exhaust branch 34, recovery system 40, filtration module 41, cooling module 42, condensation module 43, defog module 44, air inlet valve 50, main exhaust fan 60, exhaust valve 70, control device 80, first acquisition unit 81, first control unit 82, second control unit 83, second acquisition unit 84, third control unit 85, fourth control unit 86, memory 87, processor 88, computer program 89, gas concentration detection device 91, negative pressure detection device 92, rotor 93, heat exchanger 94. DETAILED DESCRIPTION

[0034] The following embodiments of the technical solution of the present application will be described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0036] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0037] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0038] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0039] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0040] Unless otherwise specified, all embodiments and optional embodiments of the present application can be combined with each other to form a new technical solution.

[0041] Unless otherwise specified, all technical features and optional technical features of this application can be combined with each other to form a new technical solution.

[0042] If there is no special explanation, all steps of the present application can be performed sequentially or randomly, preferably sequentially. For example, the method includes steps (a) and (b), which means that the method may include steps (a) and (b) performed sequentially, or may include steps (b) and (a) performed sequentially. For example, it is mentioned that the method may also include step (c), which means that step (c) can be added to the method in any order. For example, the method may include steps (a), (b) and (c), or may include steps (a), (c) and (b), or may include steps (c), (a) and (b), etc.

[0043] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0044] The battery manufacturing process includes many steps, among which the energy consumption of the coating process far exceeds that of other steps. On the one hand, the drying of cathode pole pieces requires a large amount of hot air, which is usually heated by thermal oil or superheated steam; on the other hand, the cathode slurry solvent is N-methylpyrrolidone (NMP). The large amount of NMP gas volatilized during the drying process of the pole piece needs to be recycled through a large amount of cooling water, resulting in high energy consumption. Strictly controlling the NMP gas concentration and negative pressure in the oven is crucial for energy saving and cost reduction, production safety and pole piece quality.

[0045] In the related art, the NMP gas concentration and negative pressure in the oven are regulated by manually adjusting the fresh air valve and exhaust valve to control the fresh air volume and exhaust air volume entering each oven, and manually adjusting the speed of the total fresh air fan and the speed of the total exhaust fan, thereby controlling the NMP gas concentration and negative pressure in the oven. In order to completely dry the electrode, the number of oven sections is usually more than 10, and the ovens are interconnected. The concentration or negative pressure between the single-section ovens and the upper and lower ovens have mutual influence. The amount of data of the NMP gas concentration and negative pressure signal value of the oven is huge, and it is difficult to manually synchronize and process it. Therefore, it is difficult to control the NMP gas concentration and negative pressure of all ovens by traditional methods.

[0046] In view of this, the present application provides a technical solution, which first obtains the first measured concentration of the target gas in each oven (the target gas is the gas generated during the electrode drying process and may affect the production safety or the electrode drying quality, for example, the target gas may be NMP gas); then adjusts the air inlet valve opening and exhaust valve opening of each oven according to the first measured concentration of the target gas in each oven; finally, adjusts the total air inlet fan speed of the drying equipment according to the second measured concentration of the target gas adjusted in multiple ovens. The air inlet valve opening of each oven can affect the air intake of the oven, the exhaust valve opening of each oven can affect the exhaust volume of the oven, and the total air inlet fan speed can affect the air intake of multiple ovens at the same time. Adjusting the air intake and exhaust volume of the oven can adjust the target gas concentration of the oven. The technical solution provided in the present application firstly self-regulates the concentration of the target gas in each oven through the air inlet valve and the exhaust valve of each oven, and then adjusts the speed of the total air inlet fan according to the target gas concentration after self-adjustment of the multiple ovens, which can meet the overall regulation demand of the air inlet volume of multiple ovens, thereby simultaneously regulating the target gas concentration in each oven, which is beneficial to improving the regulation efficiency of the target gas concentration in multiple ovens and achieving a balance between production safety and energy saving and consumption reduction.

[0047] The technical solution provided in the embodiment of the present application can be used for drying equipment.

[0048] The drying equipment of the present application is described below in conjunction with the accompanying drawings.

[0049] Figure 1 1 is a schematic diagram of the structure of the drying device provided in some embodiments of the present application. The drying device 1 provided in the embodiment of the present application is used to dry the electrode 2. The drying device 1 includes a total air intake fan 20 and a plurality of ovens 10, and the total air intake fan 20 is used to supply air to the plurality of ovens 10. For the convenience of observation, Figure 1 Only the specific structure of one oven 10 is shown in the figure, and other ovens 10 may have the same structure as the oven 10.

[0050] The electrode 2 can be a positive electrode of a battery device, or a negative electrode of a battery device.

[0051] The airflow driven by the main air inlet fan 20 may flow to each oven 10 through the air inlet pipeline.

[0052] In some embodiments, the drying device 1 further comprises a main air inlet duct 31 and a plurality of air inlet branches 32, wherein the plurality of air inlet branches 32 are respectively connected to the plurality of ovens 10, and the plurality of ovens 10 are respectively connected to the main air inlet duct 31 through the plurality of air inlet branches 32. The main air inlet fan 20 may be disposed in the main air inlet duct 31.

[0053] In some embodiments, the drying device 1 further includes a main exhaust duct 33 and multiple exhaust branches 34 , the multiple exhaust branches 34 are respectively connected to the multiple ovens 10 , and the multiple ovens 10 are respectively connected to the main exhaust duct 33 through the multiple exhaust branches 34 .

[0054] Each oven 10 can take in air through the air inlet branch 32 and the main air inlet duct 31 , and exhaust air to the outside through the air exhaust branch 34 and the main air exhaust duct 33 , so as to maintain a suitable air pressure in the oven 10 .

[0055] In some embodiments, the drying device 1 further comprises a main exhaust fan 60, which is used to exhaust air from the plurality of ovens 10. The main exhaust fan 60 may be disposed in the main exhaust duct 33.

[0056] Each oven 10 is provided with at least one air inlet valve 50, which can control the air volume delivered to the oven 10, that is, the air volume of the oven 10. For example, when other parameters remain unchanged, the larger the opening of the air inlet valve 50, the more air volume is delivered to the oven 10.

[0057] Each oven 10 is provided with at least one exhaust valve 70, which can control the air volume exhausted from the oven 10, that is, the exhaust volume of the oven 10. For example, when other parameters remain unchanged, the larger the opening of the exhaust valve 70, the more air volume is exhausted from the oven 10.

[0058] The air inlet valve 50 of the oven 10 may be disposed on the air inlet branch 32 communicating with the oven 10 , and the air exhaust valve 70 of the oven 10 may be disposed on the air exhaust branch 34 communicating with the oven 10 .

[0059] In some embodiments, each oven 10 further includes an exhaust fan 15 , and the exhaust fan 15 is used to exhaust air from the oven 10 to the outside.

[0060] Each oven 10 has at least one exhaust fan 15, which can control the air volume exhausted from the oven 10, that is, the exhaust volume of the oven 10. For example, when other parameters remain unchanged, the greater the speed of the exhaust fan 15, the greater the air volume exhausted from the oven 10.

[0061] The exhaust fan 15 of the oven 10 may be disposed in an exhaust branch 34 connected to the oven 10 .

[0062] In some embodiments, the drying device 1 also includes a recovery system 40, which can be connected to the main exhaust duct 33 and is used to recover the target gas in the air flow discharged from the main exhaust duct 33 for reuse, thereby reducing the harm of the target gas to the human body or the environment.

[0063] Optionally, the recovery system 40 may include a filter module 41, a cooling module 42, a condensation module 43 and a demisting module 44. The filter module 41, the cooling module 42, the condensation module 43 and the demisting module 44 are sequentially arranged along the airflow path in the recovery system 40.

[0064] The airflow of the general exhaust duct 33 comes from each oven 10, and the airflow temperature is relatively high. In the process of recovering the target gas, a cooling medium is usually used to perform heat exchange with the airflow to reduce the airflow temperature.

[0065] The recovery system 40 may also be connected to the main air inlet pipeline 31 , and the airflow after the target gas is recovered may be transported to each oven 10 again through the main air inlet pipeline 31 .

[0066] In some embodiments, the drying device 1 further comprises a rotating wheel 93, and the rotating wheel 93 is connected to the recovery system 40. The rotating wheel 93 comprises an impeller, and the impeller can suck the gas of the recovery system 40 when rotating.

[0067] A portion of the airflow after the target gas is recovered by the recovery system 40 can re-enter the oven 10 through the main air inlet pipeline 31 , and the other portion can be discharged through the rotor 93 , so that a negative pressure environment is maintained in each oven 10 .

[0068] In some embodiments, the oven 10 includes a housing 11, a circulation pipeline 12, a circulation fan 13 and a heating device 14. The housing 11 is used to accommodate the electrode 2 to be dried. Both ends of the circulation pipeline 12 are connected to the housing 11, and the circulation pipeline 12 and the housing 11 form a circulation loop, and the gas can circulate between the circulation pipeline 12 and the housing 11. The circulation fan 13 is arranged in the circulation pipeline 12, and is used to drive the airflow to circulate between the circulation pipeline 12 and the housing 11. The heating device 14 is arranged in the circulation pipeline 12, and is used to heat the airflow flowing to the housing 11, thereby increasing the temperature of the airflow flowing to the housing 11, which is conducive to drying the electrode 2.

[0069] Alternatively, the heating device may be a heat exchanger which transfers heat to the airflow by exchanging heat with the airflow passing through the heat exchanger.

[0070] Each air inlet branch 32 and each air exhaust branch 34 is connected to the circulation pipeline 12 of the corresponding oven 10 .

[0071] In some embodiments, the airflow in the total exhaust duct 33 and the airflow in the total air inlet duct 31 can perform heat exchange. The airflow in the total air inlet duct 31 can absorb the heat of the airflow in the total exhaust duct 33, thereby preheating the airflow in the total air inlet duct 31.

[0072] Optionally, the drying device 1 further includes a heat exchanger 94 , and the main air inlet pipeline 31 and the main air exhaust pipeline 33 are connected via the heat exchanger 94 .

[0073] According to the first aspect of the present application, an embodiment of the present application provides a control method for a drying device 1 . Figure 2 is a schematic flow chart of a control method for a drying device provided in some embodiments of the present application, with reference to Figure 2 , the control method of the drying equipment provided in the embodiment of the present application includes: Step S10, obtaining a first measured concentration of the target gas in each oven 10; Step S20, adjusting the opening of the air inlet valve 50 and the air exhaust valve 70 of each oven 10 according to the first measured concentration of the target gas in each oven 10, wherein the air inlet valve 50 is used to control the air inlet of the oven 10, and the air exhaust valve 70 is used to control the air exhaust of the oven 10; Step S30, obtaining a second measured concentration of the target gas in each oven 10 after being adjusted by the air inlet valve 50 and the air exhaust valve 70; and Step S40 , adjusting the rotation speed of the total air inlet fan 20 according to the second measured concentration of the plurality of ovens 10 .

[0074] The type of gas volatilized into the oven 10 during the drying process of the electrode 2 may also be different depending on the material of the electrode 2. In the embodiment of the present application, the target gas may be NMP gas or other gas that is easily volatilized from the electrode material during the drying process of the electrode.

[0075] Each oven 10 is provided with at least one air inlet valve 50, which can control the air volume delivered to the oven 10, that is, the air volume of the oven 10. For example, when other parameters remain unchanged, the larger the opening of the air inlet valve 50, the more air volume is delivered to the oven 10.

[0076] The gas delivered to the oven 10 can dilute the target gas in the oven 10. The concentration of the target gas in the oven 10 can be adjusted by adjusting the opening of the air inlet valve 50. For example, when other parameters remain unchanged, the opening of the air inlet valve 50 increases, the air intake of the oven 10 increases, and the measured concentration of the target gas in the oven 10 can be reduced. Conversely, the opening of the air inlet valve 50 decreases, the air intake of the oven 10 decreases, and the measured concentration of the target gas in the oven 10 can be increased.

[0077] The gas exhausted from the oven 10 includes the target gas. In order to ensure the pressure in the oven 10, fresh air needs to be delivered into the oven 10 after the gas is exhausted from the oven 10, and the fresh air basically does not contain the target gas. Therefore, adjusting the opening of the exhaust valve 70 can also adjust the concentration of the target gas in the oven 10. For example, when other parameters remain unchanged, the opening of the exhaust valve 70 increases, the exhaust volume of the oven 10 increases, and the measured concentration of the target gas in the oven 10 can be reduced.

[0078] In step S20, adjusting the opening of the air inlet valve 50 and the exhaust valve 70 of each oven 10 according to the first measured concentration of the target gas in each oven 10 means adjusting the opening of the air inlet valve 50 and the exhaust valve 70 of the oven 10 according to the first measured concentration. In other words, the opening of the air inlet valve 50 and the exhaust valve 70 is adjusted only according to the first measured concentration of the target gas in the oven 10 corresponding to the air inlet valve 50 and the exhaust valve 70, and has nothing to do with the concentration of the target gas in other ovens 10.

[0079] The rotation speed of the total air intake fan 20 simultaneously affects the air intake volume of the multiple ovens 10. For example, when other parameters of each oven 10 remain unchanged, the greater the rotation speed of the total air intake fan 20, the greater the total air volume delivered by the total air intake fan 20 to the multiple ovens 10, and the greater the air intake volume of each oven 10.

[0080] If the target gas concentration in the oven 10 is too high, there may be a safety risk. If the target gas concentration in the oven 10 is too low, it means that the air intake and / or exhaust volume in the oven 10 are too large, which dilutes the concentration of the target gas and / or exhausts too much target gas. The fresh air entering the oven 10 needs to be heated to dry the electrode 2, which consumes a lot of energy. The exhausted target gas needs to be cooled by the recovery system 40, resulting in a large heat loss and waste.

[0081] The opening of the air inlet valve 50 of each oven 10 can affect the air intake of the oven 10, the opening of the air exhaust valve 70 of each oven 10 can affect the air exhaust of the oven 10, and the speed of the total air intake fan 20 can simultaneously affect the air intake of multiple ovens 10. Adjusting the air intake and exhaust volume of the oven 10 can adjust the target gas concentration of the oven 10. The second measured concentration of the target gas after the self-adjustment of the multiple ovens 10 can directly represent the overall air intake adjustment requirements of the multiple ovens 10.

[0082] The embodiment of the present application firstly self-regulates the concentration of the target gas in each oven 10 through the air inlet valve 50 and the exhaust valve 70 of each oven 10, and then adjusts the rotation speed of the total air inlet fan 20 according to the second measured concentration of the target gas after self-regulation of the multiple ovens 10, which can meet the overall regulation demand of the multiple ovens 10 for the air inlet volume, thereby simultaneously regulating the target gas concentration in each oven 10, which is beneficial to improving the regulation efficiency of the target gas concentration in the multiple ovens 10 and achieving a balance between production safety and energy saving and consumption reduction.

[0083] In some embodiments, adjusting the opening of the air inlet valve and the air exhaust valve of each oven 10 according to the first measured concentration of the target gas in each oven 10 includes: If the first measured concentration is greater than the upper limit of the target concentration range of the oven 10, the openings of the air inlet valve 50 and the air exhaust valve 70 are increased; If the first measured concentration is less than the lower limit of the target concentration range, the openings of the air inlet valve 50 and the air exhaust valve 70 are reduced.

[0084] Furthermore, if the first measured concentration is within the target concentration range, the openings of the air inlet valve 50 and the air exhaust valve 70 are kept unchanged.

[0085] Each oven 10 is preset with a target concentration range. The target concentration range corresponding to each oven 10 may be a concentration range that the target gas in the oven 10 is allowed to have under the premise of safety.

[0086] The target concentration ranges of different ovens 10 may be the same or different.

[0087] If the first measured concentration of the target gas in the oven 10 is greater than the upper limit of the target concentration range of the oven 10, it means that the concentration of the target gas in the oven 10 is too high, and there is a safety risk. At this time, increasing the opening of the air inlet valve 50 and the exhaust valve 70 can increase the air intake and exhaust volumes of the oven 10, thereby diluting the target gas in the oven 10 and increasing the exhaust volume of the target gas, which can reduce the target gas concentration in the oven 10 at a higher rate, which is beneficial to improving the regulation efficiency and production safety.

[0088] If the first measured concentration of the target gas in the oven 10 is less than the lower limit of the target concentration range in the oven 10, it means that the concentration of the target gas in the oven 10 is too low, lower than the lower limit of the safety range. Under the premise of safety, the concentration of the target gas has a certain room for increase. At this time, reducing the opening of the air inlet valve 50 and the exhaust valve 70 can reduce the air intake and exhaust volume of the oven 10. Even if the concentration of the target gas in the oven 10 increases, it is not easy to cause safety hazards. In addition, the air intake of the oven 10 is equivalent to fresh air, which needs to be heated before the electrode 2 can be dried. Reducing the air intake of the oven 10 can reduce the heating energy consumption under the premise of production safety. Reducing the exhaust volume of the oven 10 can reduce the heat loss wasted in the recovery of the target gas, which is beneficial to energy saving.

[0089] In some embodiments, increasing the opening of the air inlet valve 50 and the exhaust valve 70 includes: increasing the opening of the air inlet valve 50 and the exhaust valve 70 at the same adjustment ratio. In other words, the opening of the air inlet valve 50 and the opening of the exhaust valve 70 are increased synchronously, and the increase ratio of the opening of the air inlet valve 50 is the same as the increase ratio of the opening of the exhaust valve 70.

[0090] The opening of the air inlet valve 50 and the opening of the exhaust valve 70 can be expressed in percentages. For example, when the air inlet valve 50 is fully closed, the opening of the air inlet valve 50 is zero; when the air inlet valve 50 is fully opened, the opening of the air inlet valve 50 is 100%.

[0091] The adjustment ratio of the air inlet valve 50 refers to the percentage of the adjusted opening of the air inlet valve 50. The adjustment ratio of the air exhaust valve 70 refers to the percentage of the adjusted opening of the air exhaust valve 70.

[0092] Exemplarily, when the opening of the air inlet valve 50 increases by 5%, the opening of the air exhaust valve 70 also increases by 5% simultaneously.

[0093] The openings of the air inlet valve 50 and the exhaust valve 70 increase synchronously and in equal proportion, and the air intake and exhaust volumes of the oven 10 maintain a dynamic balance as a whole, which helps to reduce the impact of the opening adjustment of the air inlet valve 50 and the exhaust valve 70 on the pressure in the oven 10.

[0094] In some embodiments, reducing the opening of the air inlet valve 50 and the exhaust valve 70 includes: reducing the opening of the air inlet valve 50 and the exhaust valve 70 at the same adjustment ratio. In other words, the opening of the air inlet valve 50 and the opening of the exhaust valve 70 are reduced synchronously, and the ratio of the reduction of the opening of the air inlet valve 50 is the same as the ratio of the reduction of the opening of the exhaust valve 70.

[0095] Exemplarily, the opening of the air inlet valve 50 is reduced by 3%, and the opening of the air exhaust valve 70 is also reduced by 3% simultaneously.

[0096] The openings of the air inlet valve 50 and the exhaust valve 70 are synchronously and proportionally reduced, and the air intake and exhaust volumes of the oven 10 are kept in dynamic balance as a whole, which is beneficial to reducing the impact of the opening adjustment of the air inlet valve 50 and the exhaust valve 70 on the pressure in the oven 10.

[0097] In some embodiments, the adjustment ratio of the opening of the air inlet valve 50 is positively correlated with the absolute value of the difference between the first measured concentration and the target concentration threshold of the oven 10. The adjustment ratio of the opening of the exhaust valve 70 is positively correlated with the absolute value of the difference between the first measured concentration and the target concentration threshold; wherein the target concentration threshold is within the target concentration range.

[0098] Each oven 10 is preset with a target concentration threshold value, and the target concentration threshold value may be an optional value for a relatively better concentration of the target gas in the oven 10 .

[0099] The preset target concentration thresholds corresponding to the multiple ovens 10 may be the same or different.

[0100] The preset target concentration threshold corresponding to each oven 10 is within the preset target concentration range corresponding to the oven 10. The target concentration threshold is greater than the lower limit of the target concentration range and less than the upper limit of the target concentration range.

[0101] Optionally, the preset target concentration threshold corresponding to each oven 10 may be the middle value of the preset target concentration range corresponding to the oven 10. The difference between the target concentration threshold and the lower limit of the target concentration range and the difference between the upper limit of the target concentration range and the target concentration threshold may be the same or different, but relatively close.

[0102] The absolute value of the difference between the first measured concentration of the target gas and the target concentration threshold can characterize the degree to which the first measured concentration of the target gas deviates from the target concentration range. For example, when the first measured concentration of the target gas is greater than the upper limit of the target concentration range, the greater the absolute value of the difference between the first measured concentration of the target gas and the target concentration threshold, the greater the degree to which the first measured concentration of the target gas deviates from the target concentration range; the greater the absolute value of the difference between the first measured concentration of the target gas and the target concentration threshold, the smaller the degree to which the first measured concentration of the target gas deviates from the target concentration range. For another example, when the first measured concentration of the target gas is less than the lower limit of the target concentration range, the greater the absolute value of the difference between the first measured concentration of the target gas and the target concentration threshold, the greater the degree to which the first measured concentration of the target gas deviates from the target concentration range; the smaller the absolute value of the difference between the first measured concentration of the target gas and the target concentration threshold, the smaller the degree to which the first measured concentration of the target gas deviates from the target concentration range.

[0103] The degree to which the first measured concentration of the target gas in the oven 10 deviates from the target concentration range can represent the required adjustment rate of the concentration of the target gas in the oven 10. For example, the greater the degree to which the first measured concentration of the target gas deviates from the target concentration range, the faster the concentration of the target gas needs to be adjusted, and the faster the air intake and exhaust volumes of the oven 10 need to be increased.

[0104] The adjustment ratio of the opening of the air inlet valve 50 and the adjustment ratio of the opening of the exhaust valve 70 are both positively correlated with the absolute value of the difference between the first measured concentration and the target concentration threshold, that is, the greater the absolute value of the difference between the first measured concentration of the target gas and the target concentration threshold, the greater the adjustment ratio of the opening of the air inlet valve 50 and the exhaust valve 70; the smaller the absolute value of the difference between the first measured concentration of the target gas and the target concentration threshold, the smaller the adjustment ratio of the opening of the air inlet valve 50 and the exhaust valve 70. Thus, the adjustment ratio of the opening of the air inlet valve 50 and the exhaust valve 70 matches the degree to which the first measured concentration of the target gas in the oven 10 deviates from the target concentration range, and the adjustment ratio of the opening of the air inlet valve 50 and the exhaust valve 70 can adapt to the adjustment rate of the air intake and exhaust volumes required by the oven 10, reduce the risk of the concentration of the target gas in the oven 10 fluctuating, and help improve production safety and the drying quality of the electrode 2.

[0105] In some embodiments, adjusting the speed of the total air inlet fan 20 according to the second measured concentration of the plurality of ovens 10 includes: Calculating a concentration average of the second measured concentrations of the plurality of ovens 10; If the average concentration is greater than the upper limit of the average concentration range, the speed of the total air inlet fan 20 is increased; If the concentration mean is less than the lower limit of the average concentration range, the rotation speed of the total air intake fan 20 is reduced.

[0106] The average concentration range may be a concentration range preset for the drying device 1 , and the average concentration range may be an average range of concentrations of the target gas in a plurality of ovens 10 that is allowed to have under a safety premise.

[0107] If the average of the second measured concentrations of the multiple ovens 10 is greater than the upper limit of the average concentration range, it means that the average concentration of the target gas in the multiple ovens 10 has exceeded the standard, and there is a safety hazard. At this time, increasing the rotation speed of the total air intake fan 20 can provide more air intake to the ovens 10, thereby reducing the concentration of the target gas in each oven 10, which is conducive to increasing the adjustment speed of the target gas concentration and reducing safety risks.

[0108] If the average concentration of the second measured concentrations of multiple ovens 10 is less than the lower limit of the average concentration range, it means that the average concentration of the target gas in the multiple ovens 10 is relatively low and a larger air intake volume is not required. At this time, reducing the rotation speed of the total air intake fan 20 is beneficial to reducing the energy consumption of the total air intake fan 20 to counteract wind resistance.

[0109] In some embodiments, the adjustment speed of the total air inlet fan 20 is positively correlated with the absolute value of the difference between the concentration mean and the average concentration threshold, wherein the average concentration threshold is within the average concentration range.

[0110] The regulating speed of the total air intake fan 20 includes increasing the speed and decreasing the speed of the total air intake fan 20 .

[0111] The average concentration threshold may be a concentration threshold preset for the drying device 1 , and the average concentration threshold may be an optional value for which the average gas concentration of the target gas in the plurality of ovens 10 is relatively optimal.

[0112] The average concentration threshold is greater than a lower limit value of the average concentration range and less than an upper limit value of the average concentration range.

[0113] Optionally, the average concentration threshold may be the middle value of the average concentration range, and the difference between the average concentration threshold and the lower limit of the average concentration range may be the same as or different from the difference between the upper limit of the average concentration range and the average concentration threshold, but are relatively close.

[0114] The absolute value of the difference between the mean concentration of the target gas in the multiple ovens 10 and the average concentration threshold value can represent the degree to which the concentration of the target gas in the multiple ovens 10 as a whole deviates from the average concentration range. For example, when the mean concentration is greater than the upper limit of the average concentration range, the greater the absolute value of the difference between the mean concentration and the average concentration threshold value, the greater the degree to which the concentration of the target gas in the multiple ovens 10 as a whole deviates from the average concentration range. For another example, when the mean concentration is less than the lower limit of the average concentration range, the greater the absolute value of the difference between the mean concentration and the average concentration threshold value, the greater the degree to which the concentration of the target gas in the multiple ovens 10 as a whole deviates from the average concentration range.

[0115] The degree to which the concentration of the target gas of the multiple ovens 10 as a whole deviates from the average concentration range can represent the required air intake adjustment rate of the multiple ovens 10 as a whole. For example, the greater the degree to which the concentration of the target gas of the multiple ovens 10 as a whole deviates from the average concentration range, the faster the concentration of the target gas of the multiple ovens 10 as a whole needs to be adjusted, and the faster the air intake of the multiple ovens 10 needs to be increased.

[0116] The adjustment speed of the total air inlet fan 20 is positively correlated with the absolute value of the difference between the mean concentration and the average concentration threshold, that is, the greater the absolute value of the difference between the mean concentration and the average concentration threshold, the greater the adjustment speed of the total air inlet fan 20; the smaller the absolute value of the difference between the mean concentration and the average concentration threshold, the smaller the adjustment speed of the total air inlet fan 20. Therefore, the adjustment speed of the total air inlet fan 20 matches the degree to which the overall target gas concentration of the multiple ovens 10 deviates from the average concentration range, and the adjustment speed of the total air inlet fan 20 can adapt to the adjustment rate of the air intake required by the multiple ovens 10, and at the same time can balance the energy consumption of the total air inlet fan 20, which is beneficial to energy saving.

[0117] Figure 3 is a schematic flow chart of a control method for a drying device provided in some other embodiments of the present application. Figure 3 , the control method of the drying device 1 also includes: Step S50, obtaining a first measured negative pressure in each oven 10; and Step S60 , adjusting the rotation speed of the exhaust fan 15 of each oven 10 according to the first measured negative pressure in each oven 10 .

[0118] Unless otherwise specified, the “negative pressure” in the embodiments of the present application refers to the absolute value of the negative pressure.

[0119] Exhausting gas from the oven 10 can also change the negative pressure in the oven 10. The negative pressure in the oven 10 can be adjusted by adjusting the speed of the exhaust fan 15. For example, when other parameters remain unchanged, the speed of the exhaust fan 15 increases, the exhaust volume of the oven 10 increases, and the negative pressure in the oven 10 can be increased. Conversely, the speed of the exhaust fan 15 decreases, the exhaust volume of the oven 10 decreases, and the negative pressure in the oven 10 can be reduced.

[0120] In step S60, adjusting the rotation speed of the exhaust fan 15 of each oven 10 according to the first measured negative pressure in each oven 10 means adjusting the rotation speed of the exhaust fan 15 of the oven 10 according to the first measured negative pressure in the oven 10. In other words, the rotation speed of the exhaust fan 15 is adjusted only according to the first measured negative pressure in the oven 10 corresponding to the exhaust valve 70, and has nothing to do with the negative pressure in other ovens 10.

[0121] The negative pressure in the oven 10 will affect the vibration of the electrode 2 on the one hand, and will also affect the concentration of the target gas on the other hand. For example, when the negative pressure is within a certain range, the leakage of the target gas to the outside can be limited.

[0122] The rotation speed of the exhaust fan 15 of each oven 10 can affect the exhaust volume of the oven 10. Adjusting the exhaust volume of the oven 10 can adjust the negative pressure of the oven 10, which is beneficial to reduce the shaking of the electrode 2 during the drying process, improve the drying quality of the electrode 2, and also minimize the leakage of the target gas to the outside, reduce safety risks, and balance the energy consumption of the exhaust fan 15.

[0123] In some embodiments, adjusting the speed of the exhaust fan 15 of each oven 10 according to the first measured negative pressure in each oven 10 includes: If the first measured negative pressure is greater than the upper limit of the target negative pressure range, the speed of the exhaust fan 15 is reduced; If the first measured negative pressure is less than the lower limit of the target negative pressure range, the rotation speed of the exhaust fan 15 is increased.

[0124] A target negative pressure range is preset for each oven 10. The target negative pressure range corresponding to each oven 10 may be the negative pressure range of the oven 10 under normal working conditions.

[0125] In the embodiment of the present application, the negative pressure is an absolute value, and the upper limit and lower limit of the target negative pressure range are both positive values.

[0126] The target negative pressure ranges of different ovens 10 may be the same or different.

[0127] If the first measured negative pressure in the oven 10 is greater than the upper limit of the target negative pressure range of the oven 10, it means that the negative pressure in the oven 10 is too high, which may have an adverse effect on the performance of the electrode 2. At this time, reducing the speed of the exhaust fan 15 can reduce the exhaust volume of the oven 10, thereby appropriately increasing the negative pressure of the oven 10, which is conducive to reducing the adverse effect of the negative pressure on the electrode 2.

[0128] If the first measured negative pressure in the oven 10 is less than the lower limit of the target negative pressure range in the oven 10, it means that the negative pressure in the oven 10 is too low and the target gas is likely to leak out. At this time, increasing the speed of the exhaust fan 15 can increase the exhaust volume of the oven 10 (the target gas exhausted by the exhaust fan 15 needs to be recycled by the recycling system 40, and no safety risk will be generated). Increasing the negative pressure in the oven 10 is conducive to limiting the leakage of the target gas and reducing safety risks.

[0129] In some embodiments, the speed of the exhaust fan 15 is adjusted according to a constant first preset speed. In other words, the speed of the exhaust fan 15 is adjusted the same each time, which is the first preset speed.

[0130] The first preset speed may be a set fixed speed, such as 1 Hz, 2 Hz or other suitable speed values.

[0131] Adjusting the rotation speed of the exhaust fan 15 according to the constant first preset rotation speed includes increasing the rotation speed of the exhaust fan 15 according to the constant first preset rotation speed, and decreasing the rotation speed of the exhaust fan 15 according to the constant first preset rotation speed.

[0132] The exhaust fan 15 is used to adjust the negative pressure of the oven 10. Adjusting the exhaust fan 15 according to a constant adjustment speed is conducive to simplifying the logical operation process of adjusting the exhaust fan 15 without affecting production safety and improving the response speed.

[0133] Figure 4 is a schematic flow chart of a control method for a drying device provided in some embodiments of the present application. Figure 4 , the control method of the drying device 1 also includes: Step S70, obtaining the second measured negative pressure in each oven 10 after being adjusted by the exhaust fan 15; Step S80 , adjusting the rotation speed of the total exhaust fan 60 according to the second measured negative pressures of the multiple ovens 10 and / or the rotation speeds of the exhaust fans 15 of the multiple ovens 10 .

[0134] In the embodiment of the present application, there is no particular limitation on the execution order of steps S50 to S80 and the execution order of steps S10 to S40. In some examples, steps S10 to S40 may be executed first, and then steps S50 to S80 may be executed. In another example, steps S50 to S80 may be executed first, and then steps S10 to S40 may be executed. In yet another example, steps S10 and S50 may be executed simultaneously, steps S20 and S60 may be executed simultaneously, steps S30 and S70 may be executed simultaneously, and steps S40 and S80 may be executed simultaneously.

[0135] The rotation speed of the total exhaust fan 60 simultaneously affects the exhaust volume of multiple ovens 10. For example, when other parameters of each oven 10 remain unchanged, the greater the rotation speed of the total exhaust fan 60, the greater the total air volume exhausted from the multiple ovens 10 by the total exhaust fan 60, and the greater the exhaust volume of each oven 10.

[0136] The second measured negative pressure is the negative pressure measured again after the oven 10 self-regulates the negative pressure in the oven 10 through its own exhaust fan 15. The second measured negative pressure can directly represent the exhaust air volume adjustment trend required by the oven 10. For example, the larger the second measured negative pressure is, the smaller the exhaust air volume of the oven 10 needs to be. The second measured negative pressures of multiple ovens 10 can represent the exhaust air volume adjustment trend required by the multiple ovens 10 as a whole.

[0137] The rotation speed of the exhaust fan 15 can represent the adjustment trend of the exhaust volume required by the oven 10. For example, the greater the rotation speed of the exhaust fan 15, the greater the exhaust volume required by the oven 10, and the need to increase the exhaust volume of the oven 10. The rotation speeds of the exhaust fans 15 of multiple ovens 10 can represent the adjustment trend of the exhaust volume required by the multiple ovens 10 as a whole.

[0138] The second measured negative pressure of the multiple ovens 10 and the rotation speed of the exhaust fans 15 of the multiple ovens 10 can both represent the adjustment trend of the exhaust volume required by the multiple ovens 10 as a whole. The embodiment of the present application can adjust the rotation speed of the total exhaust fan 60 according to one of the second measured negative pressure of the multiple ovens 10 and the rotation speed of the exhaust fans 15 of the multiple ovens 10, and can also adjust the rotation speed of the total exhaust fan 60 according to the second measured negative pressure of the multiple ovens 10 and the rotation speed of the exhaust fans 15 of the multiple ovens 10 at the same time.

[0139] The rotation speed of the total exhaust fan 60 can affect the exhaust volume of multiple ovens 10 at the same time. Adjusting the exhaust volume of the oven 10 can adjust the negative pressure of the oven 10. The embodiment of the present application adjusts the rotation speed of the total exhaust fan 60 according to at least one of the second measured negative pressure of the multiple ovens 10 and the rotation speed of the exhaust fans 15 of the multiple ovens 10, which can meet the overall adjustment requirements of the exhaust volume of the multiple ovens 10, thereby adjusting the negative pressure in each oven 10 at the same time, which is conducive to improving the negative pressure adjustment efficiency in the multiple ovens 10, not only can it reduce the shaking of the electrode 2 during the drying process, improve the drying quality of the electrode 2, but also can minimize the leakage of the target gas to the outside, reduce safety risks, and balance the energy consumption of the total exhaust fan 60.

[0140] In some embodiments, adjusting the speed of the total exhaust fan 60 according to the second measured negative pressure of the plurality of ovens 10 and / or the speed of the exhaust fans 15 of the plurality of ovens 10 comprises: Calculating a negative pressure average of the second measured negative pressures of the plurality of ovens 10; If the negative pressure average is greater than the upper limit of the average negative pressure range, the speed of the total exhaust fan 60 is reduced; If the negative pressure average is less than the lower limit of the average negative pressure range, the rotation speed of the total exhaust fan 60 is increased.

[0141] The average negative pressure range may be a preset negative pressure range of the drying device 1 , and the average negative pressure range may be an average range of negative pressures allowed in a plurality of ovens 10 under a safety premise.

[0142] If the negative pressure average of the second measured negative pressures of the multiple ovens 10 is greater than the upper limit of the average negative pressure range, it means that the average negative pressure in the multiple ovens 10 is too large, which may affect the drying or performance of the electrode 2. At this time, reducing the rotation speed of the total exhaust fan 60 can reduce the exhaust volume of the oven 10, which is conducive to reducing the negative pressure in each oven 10, increasing the negative pressure adjustment speed, and reducing the adverse effects on the electrode 2 and the energy consumption of the total exhaust fan 60.

[0143] If the average negative pressure of the second measured negative pressure of multiple ovens 10 is less than the lower limit of the average negative pressure range, it means that the average negative pressure in the multiple ovens 10 is too small, and there is a risk of leakage of the target gas in the ovens 10. At this time, increasing the rotation speed of the total exhaust fan 60 is beneficial to increase the negative pressure in each oven 10, reduce the risk of leakage of the target gas, and improve production safety.

[0144] In some embodiments, the speed of the total exhaust fan 60 is adjusted according to a constant second preset speed.

[0145] The second preset speed may be a set fixed speed. The second preset speed may be the same as or different from the first preset speed. The second preset speed may be, for example, 1 Hz, 2 Hz or other suitable speed values.

[0146] Adjusting the rotation speed of the total exhaust fan 60 according to the constant second preset rotation speed includes increasing the rotation speed of the total exhaust fan 60 according to the constant second preset rotation speed, and decreasing the rotation speed of the total exhaust fan 60 according to the constant second preset rotation speed.

[0147] The main exhaust fan 60 is used to adjust the negative pressure of multiple ovens 10. Adjusting the main exhaust fan 60 according to a constant adjustment speed is conducive to simplifying the logical operation process of adjusting the main exhaust fan 60 without affecting production safety and improving the response speed.

[0148] According to the second aspect of the present application, an embodiment of the present application provides a control method for a drying device 1 . Figure 5 is a schematic flow chart of a control method for a drying device provided in some embodiments of the present application. Figure 5 , the control method of the drying device 1 provided in the embodiment of the present application includes: Step S50, obtaining a first measured negative pressure in each oven 10; and Step S60, adjusting the rotation speed of the exhaust fan 15 of each oven 10 according to the first measured negative pressure in each oven 10; Step S70, obtaining the second measured negative pressure in each oven 10 after being adjusted by the exhaust fan 15; Step S80 , adjusting the rotation speed of the total exhaust fan 60 according to the second measured negative pressure of the multiple ovens 10 and / or the rotation speed of the exhaust fans 15 of the multiple ovens 10 .

[0149] In a further embodiment, the control method of the drying device 1 provided in the embodiment of the present application further includes: Obtaining a first measured concentration of the target gas in each oven 10; According to the first measured concentration of the target gas in each oven 10, the opening of the air inlet valve 50 and the air exhaust valve 70 of each oven 10 is adjusted, wherein the air inlet valve 50 is used to control the air inlet of the oven 10, and the air exhaust valve 70 is used to control the air exhaust of the oven 10; Obtaining a second measured concentration of the target gas in each oven 10 after being adjusted by the air inlet valve 50 and the air exhaust valve 70; and According to the second measured concentrations of the plurality of ovens 10 , the rotation speed of the total air inlet fan 20 is adjusted.

[0150] According to the third aspect of the present application, the embodiment of the present application further provides a control device 80 of a drying device 1. The drying device 1 comprises a main air inlet fan 20 and a plurality of ovens 10, and the main air inlet fan 20 is used to supply air to the plurality of ovens 10.

[0151] Figure 6 is a schematic structural block diagram of a control device for a drying device provided in some embodiments of the present application. Figure 6 , the control device 80 provided in the embodiment of the present application includes a first acquisition unit 81, a first control unit 82, and a second control unit 83. The first acquisition unit 81 is used to acquire the first measured concentration of the target gas in each oven 10. The first control unit 82 is used to control the opening of the air inlet valve 50 and the exhaust valve 70 of the oven 10 according to the first measured concentration of the target gas in each oven 10, wherein the air inlet valve 50 is used to control the air intake of the oven 10, and the exhaust valve 70 is used to control the exhaust of the oven 10. The second control unit 83 is used to control the rotation speed of the total air intake fan 20 according to the second measured concentration of the target gas in the multiple ovens 10 adjusted by the air inlet valve 50 and the exhaust valve 70. The first acquisition unit 81 is also used to acquire the second measured concentration of the target gas in each oven 10 adjusted by the air inlet valve 50 and the exhaust valve 70.

[0152] In some embodiments, the first control unit 82 is used to increase the opening of the air inlet valve 50 and the exhaust valve 70 when the first measured concentration is greater than the upper limit value of the target concentration range of the oven 10, and is used to reduce the opening of the air inlet valve 50 and the exhaust valve 70 when the first measured concentration is less than the lower limit value of the target concentration range.

[0153] In some embodiments, the second control unit 83 is used to calculate the concentration average of the second measured concentrations of multiple ovens 10, and increase the speed of the total air intake fan 20 when the concentration average is greater than the upper limit of the average concentration range, and reduce the speed of the total air intake fan 20 when the concentration average is less than the lower limit of the average concentration range.

[0154] According to the fourth aspect of the present application, the embodiment of the present application further provides a control device 80 for a drying device 1 .

[0155] Figure 7 Schematic structural block diagram of a control device for drying equipment provided in some other embodiments of the present application. Figure 7 , the control device 80 provided in the embodiment of the present application includes a second acquisition unit 84, a third control unit 85 and a fourth control unit 86. The second acquisition unit 84 is used to acquire the first measured negative pressure in each oven 10. The third control unit 85 is used to adjust the rotation speed of the exhaust fan 15 of each oven 10 according to the first measured negative pressure in each oven 10. The fourth control unit 86 is used to adjust the rotation speed of the total exhaust fan 60 according to the second measured negative pressure in the multiple ovens 10 adjusted by the exhaust fan 15 and / or the rotation speed of the exhaust fans 15 of the multiple ovens 10. The second acquisition unit 84 is also used to acquire the second measured negative pressure in each oven 10 adjusted by the exhaust fan 15.

[0156] In some embodiments, the third control unit 85 is used to reduce the speed of the exhaust fan 15 when the first measured negative pressure is greater than the upper limit value of the target negative pressure range, and to increase the speed of the exhaust fan 15 when the first measured negative pressure is less than the lower limit value of the target negative pressure range.

[0157] In some embodiments, the fourth control unit 86 is used to calculate the average negative pressure of the second measured negative pressure of multiple ovens 10, and reduce the speed of the total exhaust fan 60 when the average negative pressure is greater than the upper limit of the average negative pressure range, and increase the speed of the total exhaust fan 60 when the average negative pressure is less than the lower limit of the average negative pressure range.

[0158] According to a fifth aspect of the present application, an embodiment of the present application further provides a drying device 1, Figure 8 Schematic block diagram of a part of the structure of the drying equipment provided in some embodiments of the present application. Figure 1 and Figure 8 The drying device 1 includes a plurality of ovens 10, a total air inlet fan 20, a first detection component and a control device 80. The total air inlet fan 20 is used to supply air to the plurality of ovens 10. The first detection component is used to detect the measured concentration of the target gas in each oven 10. The control device 80 includes a memory 87 and a processor 88, the memory 87 stores a computer program 89, and the processor 88 is configured to execute the control method provided by any embodiment of the first aspect of the present application through the computer program 89.

[0159] In some embodiments, the first detection component may include a plurality of gas concentration detection devices 91 , which are disposed in the exhaust branch 34 of the oven 10 to detect the actual concentration of the target gas in the exhaust branch 34 .

[0160] One gas concentration detection device 91 may be correspondingly disposed in the exhaust branch 34 of each oven 10 , or a plurality of gas concentration detection devices 91 may be correspondingly disposed.

[0161] Since the oven 10 is in a negative pressure environment, directly placing the gas concentration detection device 91 in the oven 10 may affect the detection accuracy and service life of the gas concentration detection device 91 .

[0162] To this end, the embodiment of the present application arranges the gas concentration detection device 91 in the exhaust branch 34. The gas in the exhaust branch 34 comes from the oven 10. The measured concentration of the target gas in the exhaust branch 34 can represent the measured concentration of the target gas in the oven 10, which is beneficial to reduce the influence of the negative pressure environment of the oven 10 on the detection results and improve the detection accuracy.

[0163] In some embodiments, the second detection component is used to detect the measured negative pressure in each oven 10. Each oven 10 further includes an exhaust fan 15, which is used to exhaust air from the oven 10 to the outside.

[0164] The second detection assembly may include a plurality of negative pressure detection devices 92, and the negative pressure detection devices 92 may be provided in the oven 10. Optionally, the negative pressure detection device 92 may be a negative pressure gauge.

[0165] Each oven 10 may be provided with one negative pressure detection device 92 or multiple negative pressure detection devices 92 .

[0166] According to the sixth aspect of the present application, an embodiment of the present application provides a drying device 1, which includes a plurality of ovens 10, a total exhaust fan 60, a second detection component and a control device 80. Each oven 10 includes an exhaust fan 15, and the exhaust fan 15 is used to exhaust air from the oven 10 to the outside. The total exhaust fan 60 is used to exhaust air from the plurality of ovens 10 to the outside. The second detection component is used to detect the measured negative pressure in each oven 10. The control device 80 includes a memory 87 and a processor 88, and the memory 87 stores a computer program 89, and the processor 88 is configured to execute the control method provided in any embodiment of the second aspect of the present application through the computer program 89.

[0167] The present application provides a control method for a drying device, including: Obtaining a first measured concentration and a first measured negative pressure of the target gas in each oven 10; If the first measured concentration is greater than the upper limit of the target concentration range of the oven 10, the openings of the air inlet valve 50 and the exhaust valve 70 are increased; if the first measured concentration is less than the lower limit of the target concentration range, the openings of the air inlet valve 50 and the exhaust valve 70 are reduced; if the first measured negative pressure is greater than the upper limit of the target negative pressure range, the speed of the exhaust fan 15 is reduced; if the first measured negative pressure is less than the lower limit of the target negative pressure range, the speed of the exhaust fan 15 is increased; Obtaining a second measured concentration of the target gas in each oven 10 after adjustment by the air inlet valve 50 and the air exhaust valve 70, and obtaining a second measured negative pressure in each oven 10 after adjustment by the exhaust fan 15; Calculating a concentration average of the second measured concentrations of the plurality of ovens 10 and a negative pressure average of the second measured negative pressures of the plurality of ovens 10; If the concentration average is greater than the upper limit of the average concentration range, the speed of the total air intake fan 20 is increased; if the concentration average is less than the lower limit of the average concentration range, the speed of the total air intake fan 20 is reduced; if the negative pressure average is greater than the upper limit of the average negative pressure range, the speed of the total exhaust fan 60 is reduced; if the negative pressure average is less than the lower limit of the average negative pressure range, the speed of the total exhaust fan 60 is increased.

[0168] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A control method for drying equipment, characterized in that: The drying equipment is used to dry the electrode; The control method comprises: Obtaining a first measured concentration of a target gas in each oven of the drying device; According to the first measured concentration of the target gas in each of the ovens, adjusting the opening of the air inlet valve and the air exhaust valve of each of the ovens, wherein the air inlet valve is used to control the air inlet of the oven, and the air exhaust valve is used to control the air exhaust of the oven; Obtaining a second measured concentration of the target gas in each of the ovens after being adjusted by the air inlet valve and the air exhaust valve; and According to the second measured concentration of the plurality of ovens, the rotation speed of the total air inlet fan of the drying equipment is adjusted.

2. The control method according to claim 1, characterized in that: The adjusting the opening of the air inlet valve and the air exhaust valve of each of the ovens according to the first measured concentration of the target gas in each of the ovens comprises: If the first measured concentration is greater than the upper limit of the target concentration range of the oven, increasing the openings of the air inlet valve and the air exhaust valve; If the first measured concentration is less than the lower limit of the target concentration range, the openings of the air inlet valve and the air exhaust valve are reduced.

3. The control method according to claim 2, characterized in that: The step of increasing the opening of the air inlet valve and the air exhaust valve comprises: increasing the openings of the air inlet valve and the air exhaust valve at the same adjustment ratio; and / or The reducing the opening of the air inlet valve and the air exhaust valve comprises: The openings of the air inlet valve and the air exhaust valve are reduced simultaneously according to the same adjustment ratio.

4. The control method according to claim 2 or 3, characterized in that: The adjustment ratio of the opening of the air inlet valve is positively correlated with the absolute value of the difference between the first measured concentration and the target concentration threshold of the oven; The adjustment ratio of the opening of the exhaust valve is positively correlated with the absolute value of the difference between the first measured concentration and the target concentration threshold; Wherein, the target concentration threshold is within the target concentration range.

5. The control method according to claim 1, characterized in that: The adjusting the speed of the total air inlet fan of the drying equipment according to the second measured concentration of the plurality of ovens comprises: Calculating a concentration average of the second measured concentrations of a plurality of the ovens; If the concentration average is greater than the upper limit of the average concentration range, increasing the speed of the total air inlet fan; If the concentration mean is less than the lower limit of the average concentration range, the rotation speed of the total air inlet fan is reduced.

6. The control method according to claim 5, characterized in that: The adjustment speed of the total air inlet fan is positively correlated with the absolute value of the difference between the concentration mean and the average concentration threshold, wherein the average concentration threshold is within the average concentration range.

7. The control method according to claim 1, characterized in that: The control method further comprises: Obtaining a first measured negative pressure in each of the ovens; and The rotation speed of the exhaust fan of each of the ovens is adjusted according to the first measured negative pressure in each of the ovens.

8. The control method according to claim 7, characterized in that: The adjusting the speed of the exhaust fan of each of the ovens according to the first measured negative pressure in each of the ovens comprises: If the first measured negative pressure is greater than the upper limit of the target negative pressure range, reducing the speed of the exhaust fan; If the first measured negative pressure is less than the lower limit of the target negative pressure range, the rotation speed of the exhaust fan is increased.

9. The control method according to claim 7 or 8, characterized in that: The rotation speed of the exhaust fan is adjusted according to a constant first preset rotation speed.

10. The control method according to claim 7 or 8, characterized in that: The control method further comprises: Obtaining a second measured negative pressure in each of the ovens after adjustment by the exhaust fan; The speed of the total exhaust fan of the drying equipment is adjusted according to the second measured negative pressure of the multiple ovens and / or the speed of the exhaust fans of the multiple ovens.

11. The control method according to claim 10, characterized in that: The adjusting the speed of the total exhaust fan of the drying equipment according to the second measured negative pressure of the plurality of ovens and / or the speed of the exhaust fans of the plurality of ovens comprises: Calculating a negative pressure average of the second measured negative pressures of a plurality of the ovens; If the negative pressure average is greater than the upper limit of the average negative pressure range, reducing the rotation speed of the total exhaust fan; and If the negative pressure average is less than the lower limit of the average negative pressure range, the rotation speed of the total exhaust fan is increased.

12. The control method according to claim 10, characterized in that: The rotation speed of the total exhaust fan is adjusted according to a constant second preset rotation speed.

13. A control device for drying equipment, characterized in that: The control device comprises: A first acquisition unit, used to acquire a first measured concentration of the target gas in each oven of the drying device; a first control unit, configured to control the opening of an air inlet valve and an air exhaust valve of each of the ovens according to the first measured concentration of the target gas in each of the ovens, wherein the air inlet valve is configured to control air intake of the ovens, and the air exhaust valve is configured to control air exhaust of the ovens; and A second control unit, used for controlling the speed of the total air inlet fan of the drying device according to the second measured concentration of the target gas in the oven after being adjusted by the air inlet valve and the exhaust valve; The first acquisition unit is further used to acquire the second measured concentration of the target gas in each of the ovens after being adjusted by the air inlet valve and the air exhaust valve.

14. A drying device, characterized in that: include: Multiple ovens; A main air inlet fan, used for supplying air to the multiple ovens; A first detection component, used to obtain the measured concentration of the target gas in each of the ovens; as well as A control device comprises a memory and a processor, wherein the memory stores a computer program, and the processor is configured to execute the control method according to any one of claims 1 to 12 through the computer program.

15. The drying device according to claim 14, characterized in that: The first detection component includes a plurality of gas concentration detection devices, and the gas concentration detection devices are arranged in the exhaust branch of the oven and are used to detect the actual measured concentration of the target gas in the exhaust branch.

16. The drying device according to claim 14, characterized in that: The drying equipment also includes: a main exhaust fan, used for exhausting air from the plurality of ovens to the outside; and A second detection component is used to obtain the actual negative pressure in each of the ovens; Wherein, each of the ovens further comprises an exhaust fan, and the exhaust fan is used for exhausting air from the oven to the outside.

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