Mixing device used in lithium battery ternary positive electrode material treatment process

Abstract

The utility model relates to the technical field of mixing, which comprises a mixing tank, a first stirrer, a second stirrer and a cooling mechanism, and a cooling space, a first stirring space and a second stirring space are sequentially formed in the mixing tank along the vertical direction; the cooling mechanism is used for cooling the part, close to the cooling space, in the first stirring space through the cooling space; the output end of the first stirrer is used for extending into the first stirring space through the cooling space to stir the materials located in the first stirring space; the stirring direction of the second stirrer is opposite to that of the first stirrer, and the output end of the second stirrer is used for stretching into the second stirring space to stir materials located in the second stirring space, so that the materials circularly move from the first stirring space to the second stirring space. According to the device, irregular flow in the first stirring space and the second stirring space is ensured, so that rapid and sufficient mixing is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to mixed technical field especially relates to a kind of mixing device for lithium battery ternary positive electrode material processing process. BACKGROUND

[0002] Lithium battery ternary positive electrode material production needs to be carried out in turn primary proportioning, primary sintering, crushing, washing, secondary proportioning, secondary sintering and packaging. Among them, in primary proportioning, lithium battery ternary positive electrode material mixing uniformity needs to be paid attention to, and uneven mixing can lead to uneven reaction in the rear end, and some matrix can lack lithium, and capacity can be greatly reduced. And the mixing strength of lithium battery ternary positive electrode material, too large mixing strength can lead to the destruction of matrix morphology, and crack ball and other conditions, and insufficient mixing strength can lead to uneven mixing or too long mixing time, and affect production efficiency.

[0003] The existing positive electrode material is mostly mixed by stirrer, and the stirrer rotates in a single direction. When rotating, the stirrer drives various auxiliary materials to rotate in the same direction. Since it is single-direction stirring, the auxiliary materials need to be mixed for a long time. If the stirring time is too short, the material cannot be fully stirred, resulting in poor stirring quality. And too long stirring time will affect the production efficiency. SUMMARY

[0004] The main purpose of the utility model is to provide a kind of mixing device for lithium battery ternary positive electrode material processing process, to solve the problem of too long stirring time of existing mixing device, affect production efficiency.

[0005] To achieve the above-mentioned purpose, the technical solution proposed by the utility model is as follows:

[0006] A mixing device for lithium battery ternary positive electrode material processing process, comprising a mixing tank, a first stirrer, a second stirrer and a cooling mechanism, a cooling space, a first stirring space and a second stirring space are formed in the mixing tank in vertical order, the first stirrer and the cooling mechanism are arranged on the top side of the mixing tank; the cooling mechanism is used to cool the material in the first stirring space close to the cooling space through the cooling space; the output end of the first stirrer is used to extend into the first stirring space through the cooling space to stir the material in the first stirring space; the second stirrer is arranged on the bottom side of the mixing tank, the stirring direction of the second stirrer is opposite to that of the first stirrer, and the output end of the second stirrer is used to extend into the second stirring space to stir the material in the second stirring space, so that the material moves circularly from the first stirring space to the second stirring space.

[0007] Preferably, the mixing tank comprises a discharge port, an inlet port, a tank body and a cover body, the inlet port is arranged on the cover body, the discharge port is arranged on the tank body away from the cover body, the cooling space, the first stirring space and the second stirring space are arranged in the tank body, and the cooling space, the first stirring space and the second stirring space are sequentially arranged along the direction from the inlet port to the discharge port.

[0008] Preferably, the first stirrer comprises a first motor, a first stirring shaft and a plurality of first blades, the first motor is arranged on the side of the cover body away from the tank body, the first stirring shaft is arranged in the first stirring space in the vertical direction, each of the first blades is arranged in the length direction of the first stirring shaft in sequence and at intervals, the first stirring shaft extends through the mixing tank to connect the output end of the first motor at the end away from the second stirrer, and the first motor is used to control the rotation of the first stirring shaft so as to drive the rotation of each of the first blades.

[0009] Preferably, the second stirrer comprises a second motor, a second stirring shaft and a plurality of second blades, the second motor is arranged on the side of the tank body away from the cover body, the second stirring shaft is arranged in the second stirring space in the vertical direction, each of the second blades is arranged in the length direction of the second stirring shaft in sequence and at intervals, the second stirring shaft extends through the mixing tank to connect the output end of the second motor at the end away from the first stirrer, and the second motor is used to control the rotation of the second stirring shaft so as to drive the rotation of each of the second blades.

[0010] Preferably, the first stirring shaft and the second stirring shaft are coaxially arranged, and a connecting piece is arranged between the first stirring shaft and the second stirring shaft, the connecting piece is rotationally connected to the end of the first stirring shaft away from the first motor and the end of the second stirring shaft away from the second motor, respectively.

[0011] Preferably, the connecting piece comprises a connecting pipe and two bearings, one of the bearings is arranged at one end of the connecting pipe, and the other bearing is arranged at the other end of the connecting pipe, the first stirring shaft is connected to the bearing close to the first motor, and the second stirring shaft is connected to the bearing close to the second motor.

[0012] Preferably, the cover is respectively provided with an air inlet and an air outlet, the air inlet and the air outlet are communicated with the cooling space; the cooler comprises a cooling fan and an exhaust fan, an air outlet of the cooling fan is communicated with the cooling fan, an air suction port of the exhaust fan is communicated with the air outlet, the cooling fan is used for sending cold air into the cooling space through the air inlet to cool the air in the cooling space, so that the cold air in the cooling space contacts the material in the first stirring space; the exhaust fan is used for exhausting the hot air out of the tank body through the air outlet when the cold air contacts the material to produce the hot air.

[0013] Preferably, the cooling space is provided with a first baffle and a second baffle, the first baffle is vertically arranged between the air inlet and the air outlet, the second baffle is transversely arranged between the air inlet and the first stirring space, one end of the first baffle is connected with the cover, the other end of the second baffle is connected with one end of the second baffle, and the second baffle is located on the side of the first baffle away from the air outlet.

[0014] Preferably, the air outlet is provided with a dust cover.

[0015] Preferably, the stirring power of the first stirrer is smaller than the stirring power of the second stirrer.

[0016] Compared with the prior art, the utility model has at least the following beneficial effects:

[0017] Through the reverse rotation of the first stirrer and the second stirrer, the material in the first stirring space and the second stirring space flows irregularly, so that the rapid mixing is ensured to be sufficient, and the material is cooled through the cooler, so that the adhesion in the stirring process is avoided to affect the stirring effect, and the production efficiency is effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to the structure shown in the drawings without the creative labor for the ordinary skilled in the art.

[0019] Fig. 1 It is a structure schematic view of one embodiment of the mixing device in the lithium battery ternary positive electrode material processing process of the utility model;

[0020] Fig. 2 It is a structure schematic view of the inside of the tank body.

[0021] Explanation of reference numerals:

[0022] 1-mixing tank; 11-tank body; 12-cover; 13-discharge port; 14-charge port; 15-cooling space; 16-first stirring space; 17-second stirring space; 18-air inlet; 19-air outlet;

[0023] 2-first stirrer; 21-first motor; 22-first stirring shaft; 23-first blade;

[0024] 3-second stirrer; 31-second motor; 32-second stirring shaft; 33-second blade;

[0025] 4-cooling mechanism; 41-cooling fan; 42-exhaust fan; 43-first baffle; 44-second baffle; 45-dust cover;

[0026] 5-connector;

[0027] The implementation, functional features and advantages of the utility model will be further described with reference to the drawings in combination with embodiments. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0029] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the utility model are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications will also change accordingly.

[0030] In addition, the description of "first", "second" and the like in the utility model is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0031] In the utility model, unless another definite provision and limitation, the terms "connect", "fix" and the like should do the broad sense understanding, for example, "fix" can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be the communication of two elements or the interaction of two elements, unless another definite limitation.For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0032] In addition, the technical solutions of various embodiments of the utility model can be combined with each other, but it must be based on that ordinary skilled in the art can realize, when the combination of technical solutions appears mutual contradiction or cannot be realized, it should be considered that the combination of technical solutions does not exist, also not within the protection scope required by the utility model.

[0033] The utility model provides a kind of mixing device for lithium battery ternary positive electrode material processing process.

[0034] As Figs. 1-2 As shown in a kind of mixing device for lithium battery ternary positive electrode material processing process, including mixing tank 1, first agitator 2, second agitator 3 and cooling mechanism 4, cooling space 15 is formed in the vertical direction in mixing tank 1 and is formed first stirring space 16, second stirring space 17 in sequence, first agitator 2 and cooling mechanism 4 are all set to the top side of mixing tank 1;Cooling mechanism 4 is used to cool the material in first stirring space 16 close to cooling space 15 by cooling space 15;The output end of first agitator 2 is used to extend into first stirring space 16 by cooling space 15, and the material in first stirring space 16 is stirred;Second agitator 3 is set to the bottom side of mixing tank 1, and the stirring direction of second agitator 3 and first agitator 2 is opposite, and the output end of second agitator 3 is used to extend into second stirring space 17, and the material in second stirring space 17 is stirred, to make material from first stirring space 16 to second stirring space 17 circulating movement.

[0035] By the opposite direction rotation of first agitator 2 and second agitator 3, to make the material in first stirring space 16 and second stirring space 17 irregular flow, ensure that fast mixing is sufficient, and cooling is carried out through cooler, avoid the influence of sticking in stirring process, effectively improve production efficiency.

[0036] The mixing tank 1 comprises a discharge port 13, an inlet port 14, a tank body 11 and a cover body 12, the inlet port 14 is arranged on the cover body 12, and the discharge port 13 is arranged on the tank body 11 away from the cover body 12; a cooling space 15, a first stirring space 16 and a second stirring space 17 are arranged in the tank body 11; the cooling space 15, the first stirring space 16 and the second stirring space 17 are sequentially arranged along the direction from the inlet port 14 to the discharge port 13. The material is fed through the inlet port 14, and the material is discharged through the discharge port 13, which facilitates continuous production. The first stirring space 16 and the second stirring space 17 are arranged vertically, which facilitates the first stirrer 2 and the second stirrer 3 to accelerate mixing by gravity during stirring.

[0037] Specifically, the inlet port 14 and the discharge port 13 are both provided with valves.

[0038] Specifically, the inlet port 14 is communicated with the cooling space 15, and the discharge port 13 is communicated with the second stirring space 17.

[0039] The first stirrer 2 comprises a first motor 21, a first stirring shaft 22 and a plurality of first blades 23, the first motor 21 is arranged on the side of the cover body 12 away from the tank body 11; the first stirring shaft 22 is arranged vertically in the first stirring space 16, and each first blade 23 is arranged in the length direction of the first stirring shaft 22 in sequence and at intervals; the end of the first stirring shaft 22 away from the second stirrer 3 extends through the mixing tank 1 to connect the output end of the first motor 21, and the first motor 21 is used to control the rotation of the first stirring shaft 22, so that the first stirring shaft 22 drives each first blade 23 to rotate.

[0040] The second stirrer 3 comprises a second motor 31, a second stirring shaft 32 and a plurality of second blades 33, the second motor 31 is arranged on the side of the tank body 11 away from the cover body 12; the second stirring shaft 32 is arranged vertically in the second stirring space 17, and each second blade 33 is arranged in the length direction of the second stirring shaft 32 in sequence and at intervals; the end of the second stirring shaft 32 away from the first stirrer 2 extends through the mixing tank 1 to connect the output end of the second motor 31, and the second motor 31 is used to control the rotation of the second stirring shaft 32, so that the second stirring shaft 32 drives each second blade 33 to rotate.

[0041] The first stirring shaft 22 and the second stirring shaft 32 are coaxially arranged, and a connecting piece 5 is arranged between the first stirring shaft 22 and the second stirring shaft 32, the connecting piece 5 is rotatably connected to the end of the first stirring shaft 22 away from the first motor 21 and the end of the second stirring shaft 32 away from the second motor 31 respectively.

[0042] Specifically, the number of the first blades 23 is less than the number of the second blades 33.

[0043] Specifically, the connecting piece 5 of the first stirring shaft 22 is detachably connected.

[0044] The connecting piece 5 comprises a connecting pipe and two bearings, one of which is arranged at one end of the connecting pipe, and the other is arranged at the other end of the connecting pipe; the first stirring shaft 22 is connected to the bearing close to the first motor 21, and the second stirring shaft 32 is connected to the bearing close to the second motor 31. The arrangement of the connecting piece 5 can increase the stability of the first stirring shaft 22 and the second stirring shaft 32.

[0045] Specifically, the first stirring shaft 22, the connecting pipe and the second stirring shaft 32 are coaxially arranged.

[0046] The cover 12 is provided with an air inlet 18 and an air outlet 19, which are respectively connected to the cooling space 15; the cooler comprises a cold air fan 41 and an air extractor 42, the air outlet 19 of the cold air fan 41 is connected to the cold air fan 41, and the air inlet of the air extractor 42 is connected to the air outlet 19; the cold air fan 41 is used to send cold air into the cooling space 15 through the air inlet 18 to cool the air in the cooling space 15, so that the cold air in the cooling space 15 contacts the material in the first stirring space 16; the air extractor 42 is used to extract the hot air outside the tank body 11 through the air outlet 19 when the cold air contacts the material to produce hot air. The cold air enters the cooling space 15 to reduce the temperature in the cooling space 15, so that the material close to the cooling space 15 is cooled down. At this time, the hot and humid air rises and is extracted from the air outlet 19, so that the water evaporated in the stirring process is quickly discharged to the outside of the tank body 11, avoiding the condensation of water on the inner wall of the tank body 11 to form water droplets, causing the material to stick to the wall and caking, affecting the mixing efficiency.

[0047] The first baffle 43 and the second baffle 44 are arranged in the cooling space 15, the first baffle 43 is arranged vertically between the air inlet 18 and the air outlet 19; the second baffle 44 is arranged transversely between the air inlet 18 and the first stirring space 16; one end of the first baffle 43 is connected to the cover 12, the other end of the second baffle 44 is connected to one end of the second baffle 44, and the second baffle 44 is located on the side of the first baffle 43 away from the air outlet 19. The arrangement of the first baffle 43 and the second baffle 44 can avoid direct blowing of cold air to the material and prevent the cold air from being close to the air outlet 19.

[0048] The air outlet 19 is provided with a dust cover 45. The dust cover 45 prevents dust from entering the air extractor 42.

[0049] Specifically, the air extractor 42 is intermittently started, for example, started for two minutes and then stopped for two minutes, so that the dust adsorbed on the dust cover 45 falls down.

[0050] The stirring power of the first stirrer 2 is less than that of the second stirrer 3. The power of the second stirrer 3 is greater than that of the first stirrer 2, which can reduce the dust concentration in the cooling space 15 and ensure the overall cooling efficiency.

[0051] The above merely describes preferred embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation or direct / indirect application in other related technical fields under the inventive concept of the present application, and by using the content of the present application specification and drawings, are included in the patent protection scope of the present application.

Claims

1. A mixing device for use in a lithium electrochemical ternary cathode material processing process, characterized in that, The mixing tank comprises a mixing tank, a first stirrer, a second stirrer and a cooling mechanism, a cooling space, a first stirring space and a second stirring space are sequentially formed in the vertical direction in the mixing tank, the first stirrer and the cooling mechanism are arranged on the top side of the mixing tank; the cooling mechanism is used to cool the material in the first stirring space close to the cooling space through the cooling space; the output end of the first stirrer is used to extend into the first stirring space through the cooling space to stir the material in the first stirring space; The second stirrer is arranged on the bottom side of the mixing tank, the stirring direction of the second stirrer is opposite to that of the first stirrer, the output end of the second stirrer is used to extend into the second stirring space to stir the material in the second stirring space, so that the material moves circularly from the first stirring space to the second stirring space.

2. The mixing device for use in a process for handling lithium battery ternary cathode material according to claim 1, characterized in that, The mixing tank comprises a discharge port, a feed port, a tank body and a cover, the feed port is arranged on the cover, the discharge port is arranged on the end of the tank body away from the cover; the cooling space, the first stirring space and the second stirring space are arranged in the tank body; the cooling space, the first stirring space and the second stirring space are sequentially arranged in the direction from the feed port to the discharge port.

3. The mixing device for use in a process for handling lithium battery ternary cathode material according to claim 2, characterized in that, The first stirrer comprises a first motor, a first stirring shaft and a plurality of first blades, the first motor is arranged on the side of the cover away from the tank body; the first stirring shaft is arranged in the first stirring space in the vertical direction, each first blade is sequentially and spacedly arranged along the length direction of the first stirring shaft, the end of the first stirring shaft away from the second stirrer extends through the mixing tank to connect the output end of the first motor, the first motor is used to control the rotation of the first stirring shaft, so that the first stirring shaft drives each first blade to rotate.

4. The mixing device for use in a process for handling lithium battery ternary cathode material according to claim 3, characterized in that, The second stirrer comprises a second motor, a second stirring shaft and a plurality of second blades, the second motor is arranged on the side of the tank body away from the cover; the second stirring shaft is arranged in the second stirring space in the vertical direction, each second blade is sequentially and spacedly arranged along the length direction of the second stirring shaft, the end of the second stirring shaft away from the first stirrer extends through the mixing tank to connect the output end of the second motor, the second motor is used to control the rotation of the second stirring shaft, so that the second stirring shaft drives each second blade to rotate.

5. The mixing device for use in a process for handling lithium battery ternary cathode material according to claim 4, characterized in that, The first stirring shaft and the second stirring shaft are coaxially arranged, a connecting piece is arranged between the first stirring shaft and the second stirring shaft, the connecting piece is rotationally connected to the end of the first stirring shaft away from the first motor and the end of the second stirring shaft away from the second motor respectively.

6. The mixing device for use in a process for handling lithium battery ternary cathode material according to claim 5, characterized in that, The connecting piece comprises a connecting pipe and two bearings, one bearing is arranged on one end of the connecting pipe, and the other bearing is arranged on the other end of the connecting pipe; the first stirring shaft is connected to the bearing close to the first motor, and the second stirring shaft is connected to the bearing close to the second motor.

7. A mixing device for use in a process for handling lithium battery ternary cathode material according to any one of claims 2-6, characterized in that, The cover is respectively provided with an air inlet and an air outlet, and the air inlet and the air outlet are communicated with the cooling space; the cooling mechanism comprises a cold air fan and an air extractor, the air outlet of the cold air fan is communicated with the cold air fan, the air suction port of the air extractor is communicated with the air outlet, the cold air fan is used for sending cold air into the cooling space through the air inlet to cool the air in the cooling space, so that the cold air in the cooling space contacts the material in the first stirring space; and the air extractor is used for extracting the hot air out of the tank through the air outlet when the cold air contacts the material to produce hot air.

8. The mixing device for use in a process for handling lithium battery ternary cathode material according to claim 7, characterized in that, The first baffle and the second baffle are arranged in the cooling space, the first baffle is arranged vertically between the air inlet and the air outlet, the second baffle is arranged transversely between the air inlet and the first stirring space, one end of the first baffle is connected with the cover, the other end of the second baffle is connected with one end of the second baffle, and the second baffle is located on the side of the first baffle away from the air outlet.

9. The mixing device for use in a process for handling lithium battery ternary cathode material according to claim 7, characterized in that, The air outlet is provided with a dust cover.

10. The mixing device for use in a process for handling lithium battery ternary cathode material according to claim 7, characterized in that, The stirring power of the first stirrer is less than the stirring power of the second stirrer.

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