Synthesis equipment of lithium ion battery positive electrode material precursor

Abstract

The utility model discloses synthesis equipment for a precursor of a positive electrode material of a lithium ion battery. The synthesis equipment comprises a kettle body, a heating layer arranged on the inner side of the kettle body, and a segmented mixing assembly arranged in the kettle body, by uniformly arranging a plurality of interlayer circular plates on the inner side of the kettle body, segmented arrangement of the interior of the kettle body is realized, and precursor raw materials can be stirred and mixed among different segments through cooperation of a first servo motor, a first rotating rod, a connecting ring and stirring blades, so that the movement of an internal solution is more uniform during stirring reaction, and the reaction efficiency is improved. The influence of shearing force on the kettle body is reduced, so that the operation is more stable, bubbles generated in a solution during stirring can be dispersed when flowing between the interlayer circular plates and penetrating through the dispersion holes through the matching of the dispersion holes, the generation of the bubbles is reduced, the breakage of the bubbles is accelerated, the influence in the reaction process is reduced, and the reaction efficiency is improved. The reaction stability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical equipment, in particular to a synthesis device for a precursor of a positive electrode material for a lithium ion battery. Background Art

[0002] Lithium-ion batteries are green, high-energy batteries with outstanding advantages such as high voltage, high energy density, good cycle performance, low self-discharge, and no memory effect. They are widely used in various portable power tools, electronic instruments, mobile phones, laptops, camcorders, weapons and equipment, etc. The positive electrode material is an important component of lithium-ion batteries, and the performance of its precursor basically determines the quality of the positive electrode material. In the production process of positive electrode material precursors, the synthesis of the precursor is its core process.

[0003] The Chinese utility model patent with patent number CN213854476U discloses a micro-reactor for synthesizing a ternary cathode material precursor, including a synthesis reactor, a controller, a concentration chamber and a discharge port thereof, a stirring DC motor, a stirrer, a storage transfer box, a storage chamber, a feed pipe, a storage solenoid valve, a particle concentration sensor, a feed transport pipe, a feed solenoid valve, a storage pressure sensor and a feed pressure sensor, wherein: a controller is installed on one side of the outside of the synthesis reactor, wherein a concentration chamber and a discharge port are installed in the middle of the bottom end surface below the synthesis reactor; the top center of the synthesis reactor is installed at the top of the synthesis reactor. A stirring DC motor is installed, wherein the receiving end of the stirrer passes through the synthesis reactor body through a bearing and is connected to the receiving end of the stirring DC motor; the stirrer is installed in the center of the synthesis reactor body; a storage transfer box is installed above the synthesis reactor body, wherein a storage chamber is provided inside the storage transfer box; a feed pipe is provided above the storage transfer box, wherein a storage solenoid valve and a particle concentration sensor are installed on the feed pipe; a feed transport pipe is installed below the storage transfer box, wherein a feed solenoid valve is installed on the storage transfer box; a storage pressure sensor is installed in the storage transfer box; and a feed pressure sensor is installed inside the synthesis reactor body. The storage pressure sensor can detect the pressure of the raw materials nickel, cobalt and manganese inside the storage chamber to know their quantity, so as to automatically adjust their proportion.

[0004] Although the device can complete the mixing reaction of the precursor raw materials through the agitator, in actual use, when the stirring force is too strong, it is easy to cause the synthesis reactor to be stirred by the solution, resulting in excessive shear force and unstable operation. When the stirring force is reduced to cope with it, it is easy to affect the reaction rate of the precursor raw materials. At the same time, excessive stirring force will also generate bubbles, the generation and rupture of which will disturb the gas-liquid interface, resulting in uneven dissolution and release of the gas, thereby affecting the reaction process. Summary of the invention

[0005] The utility model overcomes the shortcomings of the prior art and provides a synthesis device for a precursor of a positive electrode material for a lithium ion battery.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a synthesis device for lithium-ion battery positive electrode material precursor, comprising: a kettle body, a heating layer arranged inside the kettle body, and a segmented mixing assembly arranged inside the kettle body;

[0007] The segmented mixing assembly comprises: a plurality of interlayer circular plates fixed on the inner side of the kettle body, a first servo motor arranged on the top of the kettle body, and a first rotating rod fixed on the output end of the first servo motor; a plurality of dispersion holes are opened on the surface of the interlayer circular plates, a plurality of connecting rings are fixed on the side of the first rotating rod located inside the kettle body, and a plurality of stirring blades are arranged on both sides of the connecting ring;

[0008] The side surface of the first rotating rod is rotatably connected to the inner side of the kettle body and the inner sides of several partition circular plates through several bearings; several connecting rings are respectively located between the partition circular plate and the inner side of the kettle body and between adjacent partition circular plates.

[0009] In a preferred embodiment of the utility model, a plurality of the partition circular plates are evenly distributed on the inner side of the kettle body in a linear array.

[0010] In a preferred embodiment of the utility model, a plurality of material turning components are symmetrically arranged inside the kettle body, and the material turning components include: a fixed cylinder fixed on the inner side of the kettle body, a second servo motor arranged on the top of the kettle body, and a second rotating rod fixed on the output end of the second servo motor; a spiral blade is fixed on the side of the second rotating rod located inside the fixed cylinder, and a reflux port is provided on one side of the fixed cylinder located between the partition circular plate and the inner side of the kettle body and between adjacent partition circular plates.

[0011] In a preferred embodiment of the utility model, the side surface of the fixed cylinder is sleeved on the inner sides of a plurality of the interlayer circular plates, and the side surface of the second rotating rod is rotatably connected to the inner sides of the fixed cylinder and the kettle body respectively through a plurality of the bearings.

[0012] In a preferred embodiment of the utility model, a feed cylinder and a liquid feed cylinder are fixed on the top of the kettle body, a first valve is arranged on the side of the feed cylinder, and a second valve is arranged on the side of the liquid feed cylinder.

[0013] In a preferred embodiment of the utility model, a discharging cylinder is fixed on the bottom of the kettle body, and a solenoid valve is arranged on the side of the discharging cylinder.

[0014] In a preferred embodiment of the present invention, an observation window for observing the internal condition of the kettle is arranged on the side of the kettle.

[0015] In a preferred embodiment of the utility model, a temperature gauge for monitoring the internal temperature of the kettle is arranged on the side of the kettle.

[0016] In a preferred embodiment of the present invention, a pressure gauge for monitoring the internal pressure of the kettle is arranged on the side of the kettle.

[0017] In a preferred embodiment of the utility model, a base is provided at the bottom of the kettle body, a plurality of support blocks are fixed on the top of the base, and one side of the plurality of support blocks is fixed to the side surface of the kettle body.

[0018] The utility model solves the defects existing in the background technology, and has the following beneficial effects:

[0019] (1) The utility model provides a synthesis device for precursors of positive electrode materials for lithium-ion batteries. By evenly arranging a plurality of interlayer circular plates on the inner side of a kettle body, a segmented arrangement of the interior of the kettle body is achieved. By cooperating with a first servo motor, a first rotating rod, a connecting ring and a stirring blade, the precursor raw materials can be stirred and mixed between different segments, so that the internal solution can move more evenly during the stirring reaction, reducing the influence of shear force on the kettle body and making the operation more stable. When bubbles are generated in the solution during stirring, they can disperse the bubbles in the solution when they flow between the interlayer circular plates and pass through the dispersion holes through the dispersion holes, thereby reducing the generation of bubbles and accelerating the bursting of bubbles, thereby reducing the influence during the reaction and improving the stability of the reaction.

[0020] (2) In the utility model, a plurality of material turning assemblies are symmetrically arranged inside the kettle body. During the stirring reaction, through the cooperation of the second servo motor, the second rotating rod, the spiral blade and the reflux port, the second servo motors in the plurality of material turning assemblies rotate clockwise and counterclockwise respectively, so as to turn over the raw material solution between the partition circular plate and the inner side of the kettle body and between adjacent partition circular plates, thereby realizing convection inside the kettle body, thereby increasing the uniformity of the distribution of the precursor raw material at each location inside the kettle body. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0022] Figure 1 It is a front view structural diagram of a preferred embodiment of the utility model;

[0023] Figure 2 It is a half-section structural diagram of a kettle body of a preferred embodiment of the utility model;

[0024] Figure 3 This is a half-section structural diagram of a fixed cylinder of a preferred embodiment of the utility model;

[0025] In the figure: 1. kettle body; 11. heating layer; 2. interlayer circular plate; 21. first servo motor; 22. first rotating rod; 23. connecting ring; 24. stirring blade; 3. fixing cylinder; 31. second servo motor; 32. second rotating rod; 33. spiral blade; 34. reflux port; 4. feed cylinder; 41. liquid feed cylinder; 42. first valve; 43. second valve; 5. discharge cylinder; 51. solenoid valve; 6. observation window; 7. temperature gauge; 8. pressure gauge; 9. base; 91. support block. DETAILED DESCRIPTION

[0026] The present invention will now be further described in detail in conjunction with the accompanying drawings and embodiments. These drawings are simplified schematic diagrams that only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0027] like Figure 1 As shown, a synthesis device for lithium-ion battery positive electrode material precursor includes: a kettle body 1, a heating layer 11 arranged on the inner side of the kettle body 1, and a segmented mixing component arranged inside the kettle body 1.

[0028] It should be noted that the middle and top of the kettle body 1 are straight-cylindrical, and the bottom is arc-shaped, which can prevent the precursor raw materials from accumulating at the bottom of the kettle body 1 to form a dead zone; the heating layer 11 is heated by heat conduction or heat radiation.

[0029] A feed cylinder 4 and a liquid inlet cylinder 41 are fixed on the top of the kettle body 1, a first valve 42 is arranged on the side of the feed cylinder 4, and a second valve 43 is arranged on the side of the liquid inlet cylinder 41. By setting the feed cylinder 4, the first valve 42 is opened, and the precursor raw material can be added to the interior of the kettle body 1. By setting the liquid inlet cylinder 41, the second valve 43 is opened, and the solution of the precursor raw material during the reaction can be added to the interior of the kettle body 1.

[0030] A discharge barrel 5 is fixed at the bottom of the kettle body 1 , and a solenoid valve 51 is arranged on the side of the discharge barrel 5 . After the stirring reaction is completed, the solenoid valve 51 is opened to discharge the product after the reaction through the discharge barrel 5 .

[0031] An observation window 6 for observing the internal condition of the kettle body 1 is arranged on the side of the kettle body 1. The observation window 6 is detachably arranged on the side of the kettle body 1. Through the arrangement of the observation window 6, when the precursor raw materials react inside the kettle body 1, it is convenient to observe the reaction condition inside the kettle body 1.

[0032] A thermometer 7 for monitoring the internal temperature of the kettle body 1 is arranged on the side of the kettle body 1. By setting the thermometer 7, when the precursor raw material reacts inside the kettle body 1, the reaction temperature inside the kettle body 1 can be monitored.

[0033] A pressure gauge 8 for monitoring the internal pressure of the kettle body 1 is arranged on the side of the kettle body 1. By setting the pressure gauge 8, when the precursor raw material reacts inside the kettle body 1, the reaction pressure inside the kettle body 1 can be monitored.

[0034] A base 9 is provided at the bottom of the kettle body 1, and a plurality of support blocks 91 are fixed on the top of the base 9. One side of the plurality of support blocks 91 is fixed to the side surface of the kettle body 1. The arrangement of the base 9 and the support blocks 91 can support and stabilize the kettle body 1.

[0035] like Figure 2 and Figure 3 As shown, the segmented mixing assembly includes: a plurality of partition circular plates 2 fixed on the inner side of the kettle body 1, a first servo motor 21 arranged on the top of the kettle body 1, and a first rotating rod 22 fixed on the output end of the first servo motor 21; a plurality of dispersion holes are opened on the surface of the partition circular plates 2, and a plurality of connecting rings 23 are fixed on the side of the first rotating rod 22 located inside the kettle body 1, and a plurality of stirring blades 24 are arranged on both sides of the connecting ring 23.

[0036] It should be noted that the side of the first rotating rod 22 is rotatably connected to the inner side of the kettle body 1 and the inner sides of the plurality of interlayer circular plates 2 through a plurality of bearings; a plurality of connecting rings 23 are respectively located between the interlayer circular plates 2 and the inner side of the kettle body 1 and between adjacent interlayer circular plates 2; a plurality of interlayer circular plates 2 are evenly distributed on the inner side of the kettle body 1 in a linear array; the side of the stirring blade 24 close to one end is clamped on one side of the connecting ring 23, and is detachably connected by the cooperation of bolts and nuts; after the precursor raw materials and the solution during the reaction are placed inside the kettle body 1, the first servo motor 21 is started to drive the first rotating rod 22 to rotate When the first rotating rod 22 rotates, the several connecting rings 23 on the side will drive the several stirring blades 24 to perform segmented stirring between the interlayer circular plate 2 and the inner side of the kettle body 1 and between the adjacent interlayer circular plates 2, so that the internal solution can move more evenly during the stirring reaction, reduce the influence of the shear force on the kettle body 1, and make the operation more stable. The bubbles generated in the solution during stirring can disperse the bubbles in the solution when flowing between the interlayer circular plates 2 and passing through the dispersion holes, reduce the generation of bubbles and accelerate the bursting of bubbles, thereby reducing the impact during the reaction and improving the stability of the reaction.

[0037] Several material turning components are symmetrically arranged inside the kettle body 1, and the material turning components include: a fixed cylinder 3 fixed on the inner side of the kettle body 1, a second servo motor 31 arranged on the top of the kettle body 1, and a second rotating rod 32 fixed on the output end of the second servo motor 31; the second rotating rod 32 is located on the side of the fixed cylinder 3 inside the fixed cylinder 3 and a spiral blade 33 is fixed thereon, and a reflux port 34 is provided on one side of the fixed cylinder 3 located between the partition circular plate 2 and the inner side of the kettle body 1 and between the adjacent partition circular plates 2.

[0038] It should be noted that the side of the fixed cylinder 3 is sleeved on the inner side of several interlayer circular plates 2, and the side of the second rotating rod 32 is rotatably connected to the inner side of the fixed cylinder 3 and the kettle body 1 respectively through several bearings; the number of the turning components is preferably two, and during the stirring reaction, the two symmetrically arranged second servo motors 31 are started, one drives the second rotating rod 32 to rotate clockwise, and the other drives the second rotating rod 32 to rotate counterclockwise. When the second rotating rod 32 rotates, it can drive the spiral blades 33 on the side to rotate synchronously. During the rotation of the spiral blades 33, the upward or downward conveying effect can drive the raw material solution between the interlayer circular plates 2 and the inner side of the kettle body 1 and between the adjacent interlayer circular plates 2 through the reflux port 34 to enter the fixed cylinder 3, or be discharged into the kettle body 1, so that the raw material solution between different sections can be turned over, and convection can be realized inside the kettle body 1, thereby increasing the uniformity of the distribution of the precursor raw material at each location inside the kettle body 1.

[0039] When the utility model is used, the precursor raw materials and the solution in the required proportions for the reaction are prepared, the first valve 42 is opened, the precursor raw materials are added to the interior of the kettle body 1, the second valve 43 is opened, and the solution of the precursor raw materials during the reaction is added to the interior of the kettle body 1. After the precursor raw materials and the solution during the reaction are placed in the kettle body 1, the first servo motor 21 is started to drive the first rotating rod 22 to rotate. When the first rotating rod 22 rotates, a plurality of connecting rings 23 on the side will drive a plurality of stirring blades 24 to perform segmented stirring between the interlayer circular plate 2 and the inner side of the kettle body 1 and between adjacent interlayer circular plates 2, so that the internal solution can move more evenly during the stirring reaction, reduce the influence of the shear force on the kettle body 1, and make the operation more stable. When the bubbles generated in the solution during stirring flow through the dispersion holes between the interlayer circular plates 2, the bubbles in the solution can be dispersed, reducing the generation of bubbles and accelerating the gas The bubbles burst, thereby reducing the impact on the reaction process and improving the stability of the reaction. During the stirring reaction, the two symmetrically arranged second servo motors 31 are started, one drives the second rotating rod 32 to rotate clockwise, and the other drives the second rotating rod 32 to rotate counterclockwise. When the second rotating rod 32 rotates, the spiral blades 33 on the side can be driven to rotate synchronously. During the rotation of the spiral blades 33, the upward or downward conveying effect can drive the raw material solution between the interlayer circular plate 2 and the inner side of the kettle body 1 and between the adjacent interlayer circular plates 2 to enter the fixed cylinder 3 through the reflux port 34, or be discharged into the kettle body 1. Then, the raw material solution between different sections can be turned over, and convection can be realized inside the kettle body 1, thereby increasing the uniformity of the distribution of the precursor raw material at each location inside the kettle body 1. After the stirring reaction is completed, the solenoid valve 51 is opened, and the reacted product can be discharged through the discharge barrel 5.

[0040] The above is based on the ideal embodiment of the utility model. Through the above description, relevant personnel can make various changes and modifications without deviating from the technical concept of the utility model. The technical scope of this utility model is not limited to the content in the specification, and the technical scope must be determined according to the scope of the claims.

Claims

1. A synthesis device for lithium-ion battery positive electrode material precursor, characterized in that: include: A kettle body (1), a heating layer (11) arranged inside the kettle body (1), and a segmented mixing component arranged inside the kettle body (1); The segmented mixing assembly comprises: a plurality of interlayer circular plates (2) fixed inside the kettle body (1), a first servo motor (21) arranged on the top of the kettle body (1), and a first rotating rod (22) fixed at the output end of the first servo motor (21); a plurality of dispersed holes are opened on the surface of the interlayer circular plates (2); a plurality of connecting rings (23) are fixed on the side surface of the first rotating rod (22) located inside the kettle body (1); and a plurality of stirring blades (24) are arranged on both sides of the connecting ring (23); The side surface of the first rotating rod (22) is rotatably connected to the inner side of the kettle body (1) and the inner sides of the plurality of interlayer circular plates (2) through a plurality of bearings; the plurality of connecting rings (23) are respectively located between the interlayer circular plates (2) and the inner side of the kettle body (1) and between adjacent interlayer circular plates (2).

2. The synthesis device of a lithium ion battery positive electrode material precursor according to claim 1, characterized in that: A plurality of the interlayer circular plates (2) are evenly distributed on the inner side of the kettle body (1) in a linear array.

3. The synthesis device of a lithium ion battery positive electrode material precursor according to claim 1, characterized in that: A plurality of material turning components are symmetrically arranged inside the kettle body (1), and the material turning components include: a fixed cylinder (3) fixed inside the kettle body (1), a second servo motor (31) arranged on the top of the kettle body (1), and a second rotating rod (32) fixed to the output end of the second servo motor (31); a spiral blade (33) is fixed to the side of the second rotating rod (32) located inside the fixed cylinder (3), and a return port (34) is provided on one side of the fixed cylinder (3) located between the partition circular plate (2) and the inside of the kettle body (1) and between adjacent partition circular plates (2).

4. The synthesis device of a lithium ion battery positive electrode material precursor according to claim 3, characterized in that: The side surface of the fixed cylinder (3) is sleeved on the inner sides of the plurality of interlayer circular plates (2), and the side surface of the second rotating rod (32) is rotatably connected to the inner sides of the fixed cylinder (3) and the kettle body (1) respectively through the plurality of bearings.

5. The synthesis device of a lithium-ion battery positive electrode material precursor according to claim 1, characterized in that: A feed cylinder (4) and a liquid feed cylinder (41) are fixed on the top of the kettle body (1); a first valve (42) is arranged on the side of the feed cylinder (4); and a second valve (43) is arranged on the side of the liquid feed cylinder (41).

6. The synthesis device of a lithium-ion battery positive electrode material precursor according to claim 1, characterized in that: A discharge cylinder (5) is fixed at the bottom of the kettle body (1), and a solenoid valve (51) is arranged on the side of the discharge cylinder (5).

7. The synthesis device of a lithium-ion battery positive electrode material precursor according to claim 1, characterized in that: An observation window (6) for observing the internal conditions of the kettle (1) is provided on the side of the kettle (1).

8. The synthesis device of a lithium-ion battery positive electrode material precursor according to claim 1, characterized in that: A temperature gauge (7) for monitoring the internal temperature of the kettle (1) is arranged on the side of the kettle (1).

9. The synthesis device of a lithium-ion battery positive electrode material precursor according to claim 1, characterized in that: A pressure gauge (8) for monitoring the internal pressure of the kettle (1) is arranged on the side of the kettle (1).

10. The synthesis device of a lithium-ion battery positive electrode material precursor according to claim 1, characterized in that: A base (9) is provided at the bottom of the kettle body (1), a plurality of support blocks (91) are fixed on the top of the base (9), and one side of the plurality of support blocks (91) is fixed to the side surface of the kettle body (1).

Images