CN111821934A - An Intelligent Control System for Synthesizing Precursors of Ternary Materials - Google Patents

Abstract

The invention discloses an intelligent control system for synthesizing a ternary material precursor, which comprises synthesis equipment and a master controller. The synthesis equipment comprises a salt solution stirrer, an alkali solution stirrer, a reaction kettle, an aging kettle, a filter press and a dryer. The master controller comprises a control module and a detection module, the master controller controls the synthesis equipment by using the control module, and detects whether the reaction condition parameters of the synthesis equipment meet the set requirements on line by using the detection module, and the control module controls the synthesis equipment according to the information fed back to the master controller by the detection module. The method and the device can rapidly and effectively detect various reaction condition parameters in the synthesis reaction process, can rapidly and effectively control the synthesis equipment by using detection data, and improve the response speed of the synthesis equipment. By presetting parameters, the rapid model change of the ternary material precursors of different types can be realized. The master controller can acquire data on line, and is favorable for producing ternary material precursor products with stable quality.

Description

An Intelligent Control System for Synthesizing Precursors of Ternary Materials

technical field

The invention belongs to the technical field of ternary material synthesis, in particular to an intelligent control system for synthesizing a ternary material precursor.

Background technique

The core of lithium batteries is the production of electrode materials. How to ensure the stable and reliable production of high-quality electrode materials becomes the most competitive product for every enterprise when facing the market choice. Lithium battery ternary materials include NCM111, NCM422, NCM523, NCM622, NCM811 and other different types. Lithium batteries made of different types of ternary materials have different performance and application scope. The degree of automation of existing ternary material production equipment is not high, especially in the process of preparing ternary material precursor, affected by equipment, environment, etc., there is a hysteresis in the adjustment of parameters such as temperature, stirring speed, and pH value. Each parameter needs to be reset and adjusted when changing the model, which is prone to errors and affects the stability of the product.

SUMMARY OF THE INVENTION

In order to solve the above-mentioned technical problems, the technical scheme adopted in the present invention is: an intelligent control system for synthesizing ternary material precursors, including synthesis equipment and a general controller,

The synthesis equipment includes a salt solution stirrer, an alkali solution stirrer, a reaction kettle, an aging kettle, a filter press and a dryer. The salt solution agitator is connected to the reaction kettle through a first delivery pump, and the The reactor is connected to the reaction kettle through the second delivery pump, the reaction kettle is connected to the aging kettle, the aging kettle is connected to the filter press through the third delivery pump, and the filter press is connected to the dryer through the lower hopper. There is a stirrer driven by the first motor, a stirrer driven by a second motor is arranged in the lye agitator, a stirrer driven by a third motor is arranged in the reaction kettle, and a fourth motor is arranged in the aging kettle. The driven stirrer, the salt liquid stirrer is connected with an automatic weighing salt adding device and an automatic water adding device, and the alkaline liquid stirrer is connected with an automatic weighing alkali adding device and an automatic water adding device. The end and the end of the second delivery pump are respectively connected with a heat exchanger, the reaction kettle includes a reaction kettle controller, the aging kettle includes an aging kettle controller, and the filter press includes a filter press controller the dryer, the dryer includes a dryer controller;

The general controller includes a control module and a detection module, and the control module controls the first delivery pump, the second delivery pump, the third delivery pump, the first motor, the second motor, the third motor, the fourth motor, Automatic weighing salt adding device, automatic water adding device, automatic weighing alkali adding device, heat exchanger, reactor controller, aging kettle controller, filter press controller and dryer controller, the detection module includes: The salt concentration detection device located in the salt solution agitator, the alkali concentration detection device located in the alkali solution agitator, the pH detection device and the temperature detection device located in the reaction kettle, the temperature detection device located in the aging kettle, and the lower hopper The humidity detection device inside the dryer and the temperature detection device located in the dryer are preset in the master controller with the ratios and reaction condition parameters of different types of ternary material precursors. The ratio and reaction condition parameters of the compound are controlled by the control module to control the synthesis equipment, and the detection module is used to detect online whether the reaction condition parameters of the synthesis equipment meet the set requirements. The control module controls the synthesis equipment according to the information fed back to the general controller by the detection module. The reaction condition parameters include the stirring rate of each stirrer, the salt concentration in the salt solution stirrer, the alkali concentration in the alkali liquor stirrer, the temperature of the heat exchanger, the pH value and temperature in the reaction kettle, and the temperature in the aging kettle. Temperature, outlet humidity of the filter press, temperature in the dryer.

As a preferred option of the above technical solution, the synthesis equipment also includes a pre-reactor, the pre-reactor includes a reaction tube arranged in a spiral, the reaction tube is immersed in a water bath, the temperature of the water bath is controlled by a heating device, and one end of the reaction tube is set as an inlet The liquid port, the other end is set as the liquid outlet, the first delivery pump and the second delivery pump are respectively connected to the liquid inlet, the liquid outlet is connected to the reaction kettle, the heating device is connected to the control module, and the water bath is provided with a temperature detection device , the temperature detection device in the water bath is connected to the detection module.

As a preference of the above technical solution, a tee pipe is connected to the liquid inlet, and the first delivery pump and the second delivery pump are respectively connected to the liquid inlet through the tee pipe.

As a preferred option of the above technical solution, the three-way pipe includes a first joint connected with the first delivery pump, a second joint connected with the second delivery pump, a third joint connected with the liquid inlet, and the first delivery pump The atomizing nozzles connected with the second delivery pump are respectively connected with the atomizing nozzles, the atomizing nozzles connected with the first delivery pump extend into the first joint and are sealedly connected with the first joint, and the atomizing nozzles connected with the second delivery pump extend into the second joint. in the joint and sealingly connected to the second joint.

As a preferred option of the above technical solution, the three-way pipe includes a main body, and the inside of the main body has a mixing cavity with a circular cross-section, the first joint, the second joint and the third joint are fixedly connected to the main body, and the first joint and the second joint are The third joints are respectively arranged tangentially to the mixing chamber, a rotating shaft is rotatably installed in the mixing chamber, and a plurality of fan blades are installed on the rotating shaft.

As a preference of the above technical solution, a heat exchanger is provided between the first delivery pump and the atomizing nozzles connected to the first delivery pump, and a heat exchanger is arranged between the second delivery pump and the atomizing nozzles connected to the second delivery pump. exchanger.

As a preference of the above technical solution, the types of the ternary material precursors include NCM111 type, NCM422 type, NCM523 type, NCM622 type, and NCM811 type.

As a preferred option of the above technical solution, the general controller is a programmable controller, and the programmable controller is connected with a data memory and a USB data interface.

The beneficial effects of the invention are as follows: the intelligent control system for synthesizing ternary material precursors of the present application can quickly and effectively detect various reaction condition parameters during the synthesis reaction process, and the detection data can be used to quickly and effectively control the synthesis equipment, and improve the The responsiveness of the synthesizer is improved. Through the preset parameters, rapid changeover of different types of ternary material precursors can be achieved. The total controller can collect data online, which is beneficial to the production of ternary material precursor products with stable quality.

Description of drawings

Fig. 1 is the structural representation of the present invention;

Fig. 2 is the structural representation of pre-reactor;

Figure 3 is a schematic diagram of the structure of the three-way pipe.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation or a specific orientation. construction and operation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first", "second", and "third" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

As shown in Figure 1-3, the intelligent control system for synthesizing ternary material precursors includes synthesis equipment, a general controller 19,

The synthesizing equipment includes a salt liquid stirrer 1, an alkaline liquid stirrer 2, a reaction kettle 3, an aging kettle 4, a filter press 5 and a dryer 6, and the salt liquid stirrer 1 is connected by a first delivery pump 7 The reaction kettle 3, the lye agitator 2 is connected to the reaction kettle 3 through the second delivery pump 8, the reaction kettle 3 is connected to the aging kettle 4, and the aging kettle 4 is connected to the filter press 5 through the third delivery pump 9, and the pressure The filter 9 is connected to the dryer 6 through the lower hopper 10, the salt liquid stirrer 1 is provided with a stirrer driven by the first motor 11, and the alkali liquor stirrer 2 is provided with a stirrer driven by the second motor 12, The reaction kettle 3 is provided with a stirrer driven by the third motor 13, the aging kettle 4 is provided with a stirrer driven by the fourth motor 14, and the salt solution stirrer 1 is connected with an automatic weighing and salting device 15, Automatic water adding device 16, the alkali liquor mixer is connected with automatic weighing alkali adding device 17, automatic water adding device 16, the end of the first delivery pump 7 and the end of the second delivery pump 8 are respectively connected with a heat exchanger 18 , the reaction kettle 3 includes a reaction kettle controller, the aging kettle 4 includes an aging kettle controller, the filter press 5 includes a filter press controller, and the dryer 6 includes a dryer controller;

The overall controller 19 includes a control module 20 and a detection module 21. The control module 20 controls the first delivery pump 7, the second delivery pump 8, the third delivery pump 9, the first motor 11, and the second motor 12 respectively. , the third motor 13, the fourth motor 14, the automatic weighing salt adding device 15, the automatic water adding device 16, the automatic weighing alkali adding device 17, the heat exchanger 18, the reactor controller, the aging kettle controller, the filter press A machine controller and a dryer controller, the detection module 21 includes a salt concentration detection device 22 located in the salt solution agitator 1, an alkali concentration detection device 23 located in the lye agitator 2, and a PH detection device 24 and temperature detection device 25, temperature detection device 25 located in the aging kettle 4, humidity detection device 26 located in the lower hopper 10, temperature detection device 25 located in the dryer 6, the overall controller 19 The proportions and reaction condition parameters of different types of ternary material precursors are preset in it, and the overall controller 19 uses the control module to control the synthesis equipment according to the proportions and reaction condition parameters of various types of ternary material precursors, and uses the detection module. 21 Online detection of whether the reaction condition parameters of the synthesis equipment meet the set requirements, the control module 20 controls the synthesis equipment according to the information fed back to the general controller 19 by the detection module 21, and the reaction condition parameters include the stirring rate of each stirrer, the stirring rate of the salt solution The salt concentration in the device 1, the alkali concentration in the lye mixer 2, the temperature of the heat exchanger 18, the pH value and temperature in the reaction kettle 3, the temperature in the aging kettle 4, the discharge humidity of the filter press 5 , the temperature in the dryer 6.

Further, the synthesis equipment also includes a pre-reactor, the pre-reactor includes a spirally arranged reaction tube 27, the reaction tube 27 is immersed in a water bath 28, the temperature of the water bath 28 is controlled by a heating device, and one end of the reaction tube 27 is set to The liquid inlet 29, the other end is set as the liquid outlet 30, the first delivery pump 7 and the second delivery pump 8 are respectively connected to the liquid inlet 29, the liquid outlet 30 is connected to the reactor 3, and the heating device is connected to the control module, so The water bath 28 is provided with a temperature detection device 25 , and the temperature detection device 25 in the water bath is connected to the detection module 21 . After passing through the heat exchanger 18 to form a low temperature, each solution is rapidly mixed at the liquid inlet 29 to form a mixed solution, and the first step is pre-reacted to obtain an amorphous colloid of nickel cobalt manganese hydroxide. In order to further obtain a product with a relatively uniform particle size, the mixed solution passes through the reaction tube 27, and the second-step pre-reaction is carried out in the high temperature and narrow reaction tube 27, and the homogeneous nucleation process is completed in a very short time. Then enter the high temperature reaction kettle 3, and further stabilize the reaction conditions in the kettle by adjusting the pH value online. Further fully react in the aging kettle 4.

Further, a tee pipe 30 is connected to the liquid inlet 29 , and the first delivery pump 7 and the second delivery pump 8 are respectively connected to the liquid inlet 29 through the tee pipe 30 .

Further, the three-way pipe 30 includes a first joint 31 connected with the first delivery pump 7, a second joint 32 connected with the second delivery pump 8, a third joint 33 connected with the liquid inlet 29, The first delivery pump 7 and the second delivery pump 8 are respectively connected with atomizing nozzles 34. The atomizing nozzles 34 connected to the first delivery pump 7 extend into the first joint 31 and are sealedly connected with the first joint 31. The second delivery pump The 8-connected atomizing nozzle 34 projects into the second joint 32 and is in sealing connection with the second joint 32 . The atomizing nozzle 34 makes each solution mix quickly and uniformly to form an amorphous colloid.

Further, the three-way pipe 30 includes a body, and the interior of the body has a mixing cavity 35 with a circular cross-section. The first joint 31, the second joint 32, and the third joint 33 are fixedly connected to the main body. The second joint 32 and the third joint 33 are respectively arranged tangentially to the mixing chamber 35 , a rotating shaft 36 is rotatably installed in the mixing chamber 35 , and a plurality of fan blades 37 are installed on the rotating shaft 36 . The liquid sprayed from the first joint 31 and the second joint 32 impinges on the fan blade 37 , the fan blade 37 rotates at a high speed to further rapidly mix the solutions, and the mixed solution is discharged from the third joint 33 . The fan blades 37 are covered with micro-holes, which can further improve the mixing effect.

Further, a heat exchanger 18 is provided between the first delivery pump 7 and the atomizing nozzle 34 connected to the first delivery pump 7 , and between the second delivery pump 8 and the atomizing nozzle 37 connected to the second delivery pump 8 . A heat exchanger 18 is provided.

Further, the types of the ternary material precursors include NCM111 type, NCM422 type, NCM523 type, NCM622 type, and NCM811 type.

Further, the general controller 19 is a programmable controller, and the programmable controller is connected with a data memory and a USB data interface.

In this application, through on-line detection of the synthesis process of lithium battery ternary material precursors, various control parameters of the synthesis equipment are quickly adjusted to finally meet the requirements for the preparation of lithium battery ternary material precursors; the module integration design concept is adopted in the synthesis equipment. , the integrated design of the control of the whole reaction is conducive to the control of product quality and the replacement and maintenance of functional devices; under the condition of ensuring the stability of product quality, the main controller can collect data, and can use software to optimize simulation. For some enterprises without strong technical strength, one-click production mode can be adopted.

The intelligent control system for synthesizing ternary material precursors of the present application advantageously promotes the high-quality and stable development of the entire lithium battery ternary positive electrode material precursors, reduces the labor cost input of production enterprises, and promotes material production towards modules and intelligent level.

It is worth mentioning that the salt liquid stirrer 1, the lye liquid stirrer 2, the reaction kettle 3, the aging kettle 4, the filter press 5, the dryer 6, the reaction kettle controller and the aging kettle involved in the patent application of the present invention. The technical features of the controller, filter press controller, dryer controller, heat exchanger 18, automatic weighing salt adding device 15, automatic water adding device 16, automatic weighing alkali adding device 17, programmable controller and other technical features should be considered For the prior art, the specific structure, working principle, and possible control mode and spatial arrangement mode of these technical features can be selected by conventional selection in the field, and should not be regarded as the invention point of the patent of the present invention. No further detailed description will be made.

The preferred specific embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make many modifications and changes according to the concept of the present invention without creative work. The technical solutions that the inventive concept can obtain through logical analysis, reasoning or limited experiments on the basis of the prior art shall all fall within the protection scope determined by the claims.

Claims (8)

1. the intelligent control system of synthesizing ternary material precursor, is characterized in that, comprises synthetic equipment, total controller, The synthesis equipment includes a salt solution stirrer, an alkali solution stirrer, a reaction kettle, an aging kettle, a filter press and a dryer. The salt solution agitator is connected to the reaction kettle through a first delivery pump, and the The reactor is connected to the reaction kettle through the second delivery pump, the reaction kettle is connected to the aging kettle, the aging kettle is connected to the filter press through the third delivery pump, and the filter press is connected to the dryer through the lower hopper. There is a stirrer driven by the first motor, a stirrer driven by a second motor is arranged in the lye agitator, a stirrer driven by a third motor is arranged in the reaction kettle, and a fourth motor is arranged in the aging kettle. The driven stirrer, the salt liquid stirrer is connected with an automatic weighing salt adding device and an automatic water adding device, and the alkaline liquid stirrer is connected with an automatic weighing alkali adding device and an automatic water adding device. The end and the end of the second delivery pump are respectively connected with a heat exchanger, the reaction kettle includes a reaction kettle controller, the aging kettle includes an aging kettle controller, and the filter press includes a filter press controller the dryer, the dryer includes a dryer controller; The main controller is provided with a control module and a detection module, and the control module controls the first delivery pump, the second delivery pump, the third delivery pump, the first motor, the second motor, the third motor, and the fourth motor respectively. , automatic weighing salt adding device, automatic water adding device, automatic weighing alkali adding device, heat exchanger, reactor controller, aging kettle controller, filter press controller and dryer controller, the detection module includes There are a salt concentration detection device located in the salt solution agitator, an alkali concentration detection device located in the lye agitator, a pH detection device and a temperature detection device located in the reaction kettle, a temperature detection device located in the aging kettle, and a temperature detection device located in the bottom. The humidity detection device in the hopper and the temperature detection device in the dryer are preset in the master controller with the ratios and reaction condition parameters of different types of ternary material precursors. The ratio of the precursor and the parameters of the reaction conditions are controlled by the control module to control the synthesis equipment, and the detection module is used to detect online whether the reaction condition parameters of the synthesis equipment meet the set requirements. The control module controls the synthesis equipment according to the information fed back to the general controller by the detection module. , the reaction conditions parameters include the stirring rate of each stirrer, the salt concentration in the salt liquor stirrer, the alkali concentration in the alkali liquor stirrer, the temperature of the heat exchanger, the pH value and temperature in the reaction kettle, the temperature in the aging kettle temperature, the discharge humidity of the filter press, and the temperature in the dryer. 2. The intelligent control system for synthesizing ternary material precursors as claimed in claim 1, wherein the synthesis equipment also includes a pre-reactor, and the pre-reactor includes a reaction tube arranged in a spiral, and the reaction tube is soaked In the water bath, the temperature of the water bath is controlled by a heating device, one end of the reaction tube is set as the liquid inlet, the other end is set as the liquid outlet, the first delivery pump and the second delivery pump are respectively connected to the liquid inlet, and the liquid outlet is connected to the reaction kettle , the heating device is connected to the control module, the water bath is provided with a temperature detection device, and the temperature detection device in the water bath is connected to the detection module. 3. The intelligent control system for synthesizing ternary material precursors as claimed in claim 2, wherein the liquid inlet is connected with a tee pipe, and the first delivery pump and the second delivery pump pass through the tee pipe respectively Connect the liquid inlet. 4. The intelligent control system for synthesizing ternary material precursors according to claim 3, wherein the three-way pipe comprises a first joint connected with the first delivery pump, and a joint connected with the second delivery pump. The second joint, the third joint connected with the liquid inlet, the first delivery pump and the second delivery pump are respectively connected with atomizing nozzles, and the atomizing nozzles connected with the first delivery pump extend into the first joint and connect with the first delivery pump. The joint is sealed and connected, and the atomizing nozzle connected to the second delivery pump extends into the second joint and is sealedly connected with the second joint. 5. The intelligent control system for synthesizing ternary material precursors according to claim 4, wherein the three-way pipe comprises a body, and the interior of the body has a mixing cavity with a circular cross-section, the first joint, The second joint and the third joint are fixedly connected to the body. The first joint, the second joint and the third joint are respectively arranged tangentially to the mixing chamber. A rotating shaft is rotatably installed in the mixing chamber, and several fan blades are installed on the rotating shaft. 6. The intelligent control system for synthesizing ternary material precursors according to claim 5, characterized in that, a heat exchanger is provided between the first delivery pump and the atomizing nozzle connected to the first delivery pump, and the first delivery pump is provided with a heat exchanger. A heat exchanger is provided between the second delivery pump and the atomizing nozzle connected to the second delivery pump. 7. The intelligent control system for synthesizing ternary material precursors according to claim 1, wherein the types of the ternary material precursors include NCM111 type, NCM422 type, NCM523 type, NCM622 type, NCM811 type . 8 . The intelligent control system for synthesizing ternary material precursors according to claim 1 , wherein the general controller is a programmable controller, and the programmable controller is connected with a data memory and a USB data interface. 9 .

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