Reaction kettle with lithium ion battery positive electrode material precursor

Abstract

The utility model discloses a reaction kettle with a lithium ion battery positive electrode material precursor, which comprises a reaction kettle body and a concentration device, and a plurality of roller devices are fixedly arranged at the lower end of a bottom equipment bracket of the reaction kettle body; an energy storage device is fixedly arranged at the end, away from the concentration device, of the equipment support and comprises a lithium ion battery and a voltage transformation device, a motor is fixedly arranged at the top of the reaction kettle body, and power output by the lithium ion battery is supplied to the motor after being transformed by the voltage transformation device; a positioning sleeve is arranged in an inner cavity of the reaction kettle body, a stirring shaft is arranged in the positioning sleeve, a first anti-precipitation paddle assembly is arranged at the position, located at an outlet of the first feeding pipe, of the stirring shaft, a second anti-precipitation paddle assembly is fixedly arranged at the lower end of the stirring shaft, and an outlet of the second feeding pipe is aligned to the second anti-precipitation paddle assembly. According to the technical scheme, the structural design is reasonable, movement is convenient, electric energy consumption can be reduced, the anti-precipitation effect is good, and produced products are stable in quality and good in practicability.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium ion batteries, and particularly relates to a reaction kettle with a precursor of a lithium ion battery cathode material. Background Art

[0002] At present, the cathode materials of lithium ion batteries are being upgraded towards high nickel, high voltage and single crystal directions. While bringing high energy density, improved safety performance and cost reduction, it also increases the process difficulty of material production, and puts forward higher requirements for precursor synthesis, doping, coating and understanding of material systems. With the development of ternary cathodes towards single crystal and high nickel, the corresponding precursors are also developing towards small particle size and narrow distribution. Due to the short particle growth cycle, it is more difficult to control the morphology and particle size during synthesis, which puts forward higher requirements for synthesis equipment.

[0003] The production process of the precursor can be divided into two types: batch method and continuous method. The particle size distribution of the precursor produced by the batch method is extremely narrow, and the continuous method has higher production capacity. The residence time of the materials in the reaction kettle during batch production is relatively uniform, and the particle size distribution of the produced precursor is narrower, which is suitable for the production of high-end products such as high nickel and single crystal precursor products; however, it has the disadvantages of poor production continuity and poor batch stability. The continuous method has a higher production rate. The production capacity of the continuous method in a reaction kettle with the same volume is about twice that of the batch method, and the batch stability is good; but due to feeding and discharging at the same time, the residence time distribution of the materials in the reaction kettle is wider, and the particle size distribution of the produced precursor is also wider. In particular, there are some particles with too small particle size, which will cause overburning during the cathode sintering process, thus affecting the cathode quality. At present, it is mainly used for the production of medium and low-end precursor products.

[0004] The existing reaction kettles for producing precursors of lithium ion battery cathode materials still have deficiencies: (1) Due to the large volume and heavy overall weight of the reaction kettle, there are no rollers at the bottom, making it inconvenient to move; (2) The reaction kettle consumes electric energy during production. When the reaction kettle works for a long time, the motor energy consumption is high; (3) The stirring blades are driven by a motor to fully stir the precursor of the lithium ion battery cathode material in the reaction kettle. However, the existing stirring blade structure is not reasonably designed, resulting in the precursor of the lithium ion battery cathode material being prone to precipitate at the bottom of the reaction kettle, and the crystal particles are easy to agglomerate, resulting in unstable product quality. Summary of the Utility Model

[0005] Aiming at the deficiencies of the existing technology, the purpose of the present utility model is to provide a reaction kettle with a precursor of a lithium ion battery cathode material, which has a reasonable structure design, is convenient to move, can reduce power consumption, has a good anti-precipitation effect, the produced product has stable quality and good practicability.

[0006] To achieve the above object, the present utility model provides the following technical solutions: A reaction kettle with a precursor of a lithium-ion battery cathode material, comprising a reaction kettle body and a concentration enhancing device communicated with the inner cavity of the reaction kettle body. A device support is fixedly arranged at the bottom of the reaction kettle body, and a plurality of roller devices are fixedly arranged at the lower end of the device support; A energy storage device is fixedly arranged at the end of the device support away from the concentration enhancing device. The energy storage device comprises a lithium-ion battery and a voltage transformation device. A motor is fixedly arranged at the top of the reaction kettle body. A connecting wire is arranged between the motor and the voltage transformation device. The electricity output by the lithium-ion battery is supplied to the motor after being transformed by the voltage transformation device;

[0007] A positioning sleeve is arranged in the inner cavity of the reaction kettle body. A first feed pipe through hole is arranged at the upper left end of the positioning sleeve, and a second feed pipe through hole is arranged at the upper right end of the positioning sleeve. A first feed pipe is arranged in the first feed pipe through hole, and a second feed pipe is arranged in the second feed pipe through hole; A stirring shaft is arranged in the positioning sleeve. The upper end of the stirring shaft is connected to the output shaft of the motor, and the lower end of the stirring shaft protrudes out of the lower port of the positioning sleeve;

[0008] A first anti-precipitation paddle blade assembly is arranged at the outlet position of the first feed pipe on the stirring shaft. A second anti-precipitation paddle blade assembly is fixedly arranged at the lower end of the stirring shaft. The outlet of the second feed pipe is aligned with the second anti-precipitation paddle blade assembly.

[0009] The present utility model is further arranged as: The lithium-ion battery comprises a battery shell, a ternary precursor of a lithium-ion battery cathode material and a zinc hydroxy stannate coating layer. The ternary precursor of the lithium-ion battery cathode material and the zinc hydroxy stannate coating layer are both arranged in the battery shell, and the ternary precursor of the lithium-ion battery cathode material is coated in the zinc hydroxy stannate coating layer.

[0010] The present utility model is further arranged as: A cover plate is arranged at the upper end of the reaction kettle body. A sealing gasket is arranged between the cover plate and the upper end surface of the reaction kettle body, and the cover plate and the upper end surface of the reaction kettle body are fixedly locked by bolts.

[0011] The present utility model is further arranged as: The first anti-precipitation paddle blade assembly comprises a first shaft sleeve and a plurality of first paddle blades integrally arranged with the first shaft sleeve. The first paddle blades are inclined. The first shaft sleeve is fixedly connected to the stirring shaft by bolts. By rotating the first anti-precipitation paddle blade assembly, the liquid flows upward to the inner cavity of the positioning sleeve.

[0012] The present utility model is further configured as follows: The second anti-sedimentation blade assembly includes a second shaft sleeve and a plurality of second blades integrally provided with the second shaft sleeve. The second blades are inclined. The second shaft sleeve is fixedly connected to the stirring shaft by bolts. By rotating the second anti-sedimentation blade assembly, the liquid flows upward above the inner cavity of the reaction kettle body.

[0013] The present utility model is further configured as follows: A diversion pipe is provided on one side of the inner cavity of the reaction kettle body. A concentration increasing port is provided at the lower right end of the inner cavity of the reaction kettle body. A control ball valve is provided between the concentration increasing port and the concentration increasing device. A clear liquid outlet is provided at the lower right end of the concentration increasing device.

[0014] The beneficial effects of the present utility model are as follows: Compared with the prior art, the present utility model has a reasonable structural design. A ternary precursor of a lithium-ion battery positive electrode material is provided inside the lithium-ion battery in the energy storage device. The motor uses a servo motor, which can be directly powered by a power cord or selectively powered by the lithium-ion battery. The electricity output by the lithium-ion battery is transformed by a voltage transformation device and then drives the motor to work. It stores electricity during the low electricity price period and releases electric energy during the peak period, effectively shaving the peak and filling the valley, and reducing the electricity bill expenditure.

[0015] A positioning sleeve is provided inside the inner cavity of the reaction kettle body. By rotating the first anti-sedimentation blade assembly, the liquid flows upward above the inner cavity of the positioning sleeve. By rotating the second anti-sedimentation blade assembly, the liquid flows upward above the inner cavity of the reaction kettle body. The ternary precursor of the lithium-ion battery positive electrode material during the production process inside the reaction kettle body is easily impacted by the water flow, which can prevent the precipitation of the ternary precursor of the lithium-ion battery positive electrode material, and has a good anti-sedimentation effect and stable product quality. It can control the fine solid crystal particles in the solution from agglomerating and cracking, obtain sufficiently fine solid particles, and evenly distribute them in the solution, which will significantly improve the comprehensive performance of the slurry. At present, the energy consumption of the stirring reaction kettle using this technology can be reduced by more than 15%, which can reduce the power consumption and has good practicability.

[0016] The following further illustrates the present utility model in conjunction with the specification drawings and specific embodiments. Description of the Drawings

[0017] Figure 1 It is a structural schematic diagram of an embodiment of the present utility model;

[0018] Figure 2 It is a structural schematic diagram of the lithium-ion battery of an embodiment of the present utility model;

[0019] Figure 3 It is a structural schematic diagram of the first anti-sedimentation blade assembly of an embodiment of the present utility model;

[0020] Figure 4 It is a structural schematic diagram of the second anti-sedimentation blade assembly of an embodiment of the present utility model. DETAILED DESCRIPTION

[0021] In the description of this embodiment, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "front", "back", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore, cannot be understood as a limitation on the utility model. In addition, if the terms "first", "second", and "third" appear, they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0022] See also Figures 1 to 4 The utility model discloses a reactor with a precursor of a positive electrode material for a lithium-ion battery, comprising a reactor body 1 and a concentration device 2 communicated with the inner cavity of the reactor body, a device bracket 3 is fixedly arranged at the bottom of the reactor body 1, and a plurality of roller devices 4 are fixedly arranged at the lower end of the device bracket 3; an energy storage device 5 is fixedly arranged at the end of the device bracket 4 away from the concentration device, and the energy storage device 5 includes a lithium-ion battery 51 and a transformer 52; a motor 6 is fixedly arranged at the top of the reactor body 1, and a connecting wire 7 is arranged between the motor 6 and the transformer 52, and the electricity output by the lithium-ion battery 51 is transformed by the transformer 52 to supply power to the motor 6;

[0023] A positioning sleeve 8 is provided in the inner cavity of the reactor body 1, a first feed pipe through hole 81 is provided at the upper left end of the positioning sleeve 8, a second feed pipe through hole 82 is provided at the upper right end of the positioning sleeve 8, a first feed pipe 9 is provided in the first feed pipe through hole 81, and a second feed pipe 10 is provided in the second feed pipe through hole 82; a stirring shaft 11 is provided in the positioning sleeve 8, the upper end of the stirring shaft 11 is connected to the output shaft of the motor 6, and the lower end of the stirring shaft 11 is exposed from the lower end of the positioning sleeve 8;

[0024] The stirring shaft 11 is provided with a first anti-sedimentation blade assembly 12 at the outlet position of the first feed pipe 9 , a second anti-sedimentation blade assembly 13 is fixedly provided at the lower end of the stirring shaft 11 , and the outlet of the second feed pipe 10 is aligned with the second anti-sedimentation blade assembly 13 .

[0025] Preferably, the bottom of the reactor body 1 is fixed to the equipment bracket 3 by welding or bolting, and the equipment bracket 4 is fixed to the energy storage device 5 by bolting at the end away from the concentration device; a total of 4 roller devices 4 are arranged at the lower end of the equipment bracket 3, and the 4 roller devices 4 are distributed in a rectangular shape.

[0026] The output shaft of the motor 6 is connected to the upper end of the stirring shaft 11 through a coupling; a power cord is provided on the motor 6, and the motor 6 can be directly powered by the power cord or selectively powered by the electricity output from the lithium-ion battery 51 after being stepped down by the voltage conversion device 52; the lithium-ion battery 51 of the energy storage device 5 stores electricity during the low electricity price period and releases electric energy during the peak period, effectively shaving the peak and filling the valley, and reducing the electricity bill expenditure.

[0027] To make the structural design of the present utility model more reasonable, preferably, the lithium-ion battery 51 of this embodiment includes a battery housing 511, a ternary precursor of lithium-ion battery cathode material 512, and a zinc hydroxystannate coating layer 513. The ternary precursor of lithium-ion battery cathode material 512 and the zinc hydroxystannate coating layer 513 are both arranged inside the battery housing 511, and the ternary precursor of lithium-ion battery cathode material 512 is coated inside the zinc hydroxystannate coating layer 513.

[0028] Preferably, the ternary precursor of lithium-ion battery cathode material 512 is a small-particle high-nickel ternary precursor of lithium-ion battery cathode material.

[0029] A cover plate 14 is provided at the upper end of the reaction kettle body 1. A gasket 15 is provided between the cover plate 14 and the upper end surface of the reaction kettle body 1, and the cover plate 14 and the upper end surface of the reaction kettle body 1 are fixedly locked by bolts.

[0030] The first anti-settling blade assembly 12 includes a first shaft sleeve 121 and a plurality of first blades 122 integrally provided with the first shaft sleeve. The first blades 122 are inclined. The first shaft sleeve 121 is fixedly connected to the stirring shaft 11 by bolts. By rotating the first anti-settling blade assembly 12, the liquid flows upward above the inner cavity of the positioning sleeve 8. Preferably, the number of the first blades 122 is 3-6, and the first blades 122 are in a spiral structure or the working surface is inclined upward by 15-30°.

[0031] The second anti-settling blade assembly 13 includes a second shaft sleeve 131 and a plurality of second blades 132 integrally provided with the second shaft sleeve. The second blades 132 are inclined. The second shaft sleeve 131 is fixedly connected to the stirring shaft 11 by bolts. By rotating the second anti-settling blade assembly 13, the liquid flows upward above the inner cavity of the reaction kettle body 1. Preferably, the number of the second blades 132 is 3-6, and the second blades 132 are in a spiral structure or the working surface is inclined upward by 15-30°.

[0032] A diversion pipe 16 is provided on one side of the inner cavity of the reaction kettle body 1. A concentration increasing port 17 is provided at the lower right end of the inner cavity of the reaction kettle body 1. A control ball valve 18 is provided between the concentration increasing port 17 and the concentration increasing device 2. A clear liquid outlet 21 is provided at the lower right end of the concentration increasing device 2.

[0033] Preferably, the upper end of the positioning sleeve 8 is integrally provided with or fixedly connected to the inner wall surface of the cover plate 14 by bolts. The cover plate 14 is provided with a first vertical through hole, a second vertical through hole, a third vertical through hole, and a stirring shaft through hole. The upper end of the diversion pipe 16 passes through the first vertical through hole, the upper end of the first feed pipe 9 passes through the second vertical through hole, the upper end of the second feed pipe 10 passes through the third vertical through hole, and the upper end of the stirring shaft 11 passes through the stirring shaft through hole 11.

[0034] In practical applications, a ternary precursor 512 of a lithium-ion battery cathode material is provided in the lithium-ion battery 51 in the energy storage device 5; the motor 6 is a servo motor, which can be directly powered by a power cord or selectively powered by the lithium-ion battery 51. The electricity output by the lithium-ion battery 51 is transformed by the voltage transformation device 52 and then drives the motor to work, storing electricity during the low electricity price period and releasing electric energy during the peak period, effectively shaving peaks and filling valleys, and reducing electricity bills.

[0035] A positioning sleeve 8 is arranged in the inner cavity of the reactor body 1. By rotating the first anti-settling paddle assembly 12, the liquid flows upward above the inner cavity of the positioning sleeve 8. By rotating the second anti-settling paddle assembly 13, the liquid flows upward above the inner cavity of the reactor body 1. The precursor of the lithium-ion battery cathode material during the production process in the reactor body 1 is vulnerable to the impact of water flow, which can prevent the precipitation of the lithium-ion battery cathode material precursor, with good anti-settling effect and stable product quality; it can control the fine solid crystal particles in the solution from agglomerating and cracking, obtain sufficiently small solid particles, and evenly distribute them in the solution, which will significantly improve the comprehensive performance of the slurry. At present, the energy consumption of the stirring reactor using this technology can be reduced by more than 15%, which can reduce power consumption and has good practicability.

[0036] The specific description of the present invention in the above embodiments is only used to further illustrate the present invention and cannot be understood as a limitation on the protection scope of the present invention. Those skilled in the art make some non-essential improvements and adjustments to the present invention based on the content of the above invention, which all fall within the protection scope of the present invention.

Claims

1. A reactor with a precursor of a positive electrode material for a lithium-ion battery, comprising a reactor body (1) and a concentration device (2) communicating with the inner cavity of the reactor body, characterized in that: An equipment support (3) is fixedly arranged at the bottom of the reactor body (1), and a plurality of roller devices (4) are fixedly arranged at the lower end of the equipment support (3); an energy storage device (5) is fixedly arranged at the end of the equipment support (4) away from the concentration device, and the energy storage device (5) comprises a lithium-ion battery (51) and a transformer (52); a motor (6) is fixedly arranged at the top of the reactor body (1), and a connecting wire (7) is arranged between the motor (6) and the transformer (52); the electricity output by the lithium-ion battery (51) is transformed by the transformer (52) to supply power to the motor (6); A positioning sleeve (8) is arranged in the inner cavity of the reactor body (1); a first feed pipe through hole (81) is arranged at the upper left end of the positioning sleeve (8); a second feed pipe through hole (82) is arranged at the upper right end of the positioning sleeve (8); a first feed pipe (9) is arranged in the first feed pipe through hole (81); a second feed pipe (10) is arranged in the second feed pipe through hole (82); a stirring shaft (11) is arranged in the positioning sleeve (8); an upper end of the stirring shaft (11) is connected to an output shaft of a motor (6); and a lower end of the stirring shaft (11) is exposed from a lower port of the positioning sleeve (8); The stirring shaft (11) is provided with a first anti-sedimentation blade assembly (12) at the outlet of the first feed pipe (9), a second anti-sedimentation blade assembly (13) is fixedly provided at the lower end of the stirring shaft (11), and the outlet of the second feed pipe (10) is aligned with the second anti-sedimentation blade assembly (13).

2. The reactor having a precursor of a positive electrode material for a lithium-ion battery according to claim 1, characterized in that: The lithium-ion battery (51) comprises a battery housing (511), a lithium-ion battery positive electrode material ternary precursor (512) and a zinc hydroxystannate coating layer (513); the lithium-ion battery positive electrode material ternary precursor (512) and the zinc hydroxystannate coating layer (513) are both arranged in the battery housing (511), and the lithium-ion battery positive electrode material ternary precursor (512) is coated in the zinc hydroxystannate coating layer (513).

3. The reactor having a precursor of a positive electrode material for a lithium-ion battery according to claim 2, characterized in that: A cover plate (14) is provided at the upper end of the reactor body (1), a sealing gasket (15) is provided between the cover plate (14) and the upper end surface of the reactor body (1), and the cover plate (14) and the upper end surface of the reactor body (1) are fastened and fixed by bolts.

4. The reactor having a precursor of a positive electrode material for a lithium-ion battery according to claim 3, characterized in that: The first anti-sedimentation blade assembly (12) comprises a first shaft sleeve (121) and a plurality of first blades (122) integrally arranged with the first shaft sleeve, the first blades (122) being arranged at an angle, the first shaft sleeve (121) being fixed to the stirring shaft (11) by bolt connection, and the first anti-sedimentation blade assembly (12) being rotated so that liquid flows toward the upper part of the inner cavity of the positioning sleeve (8).

5. The reactor having a precursor of a positive electrode material for a lithium-ion battery according to claim 4, characterized in that: The second anti-sedimentation blade assembly (13) comprises a second shaft sleeve (131) and a plurality of second blades (132) integrally arranged with the second shaft sleeve, the second blades (132) being arranged at an angle, the second shaft sleeve (131) being fixed to the stirring shaft (11) by bolt connection, and the second anti-sedimentation blade assembly (13) being rotated so that the liquid flows toward the upper part of the inner cavity of the reactor body (1).

6. A reactor having a precursor of a positive electrode material for a lithium-ion battery according to claim 1 or 5, characterized in that: A flow guide tube (16) is provided on one side of the inner cavity of the reactor body (1), a concentration port (17) is provided at the lower right end of the inner cavity of the reactor body (1), a control ball valve (18) is provided between the concentration port (17) and the concentration device (2), and a clear liquid outlet (21) is provided at the lower right end of the concentration device (2).

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