CN212409350U - Mixed dry atmosphere system for lithium battery anode material production - Google Patents
Mixed dry atmosphere system for lithium battery anode material production Download PDFInfo
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- CN212409350U CN212409350U CN202020380125.2U CN202020380125U CN212409350U CN 212409350 U CN212409350 U CN 212409350U CN 202020380125 U CN202020380125 U CN 202020380125U CN 212409350 U CN212409350 U CN 212409350U
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Abstract
The utility model relates to a lithium battery anode material production mixing drying atmosphere system, which comprises a plurality of storage bins, a plurality of automatic metering components which are arranged below the storage bins and correspondingly connected with the storage bins, a high-speed mixer connected with the automatic metering components and a drying atmosphere component which is connected with the high-speed mixer and is used for drying materials in the high-speed mixer; this dry atmosphere system is mixed in production of lithium cell cathode material can carry out the drying to the material in the blending bunker when the compounding, prevents that the material adhesion from improving the material and mixing the effect at the blending bunker inner wall, and then promotes lithium cell cathode material's quality. This lithium battery cathode material production mixes dry atmosphere system collects the storage, weighs, mixes, the ejection of compact is as an organic whole, has improved material mixing efficiency and mixing accuracy greatly, is favorable to improving lithium battery cathode material's quality.
Description
Technical Field
The utility model belongs to battery material production field, concretely relates to lithium cell cathode material produces mixed dry atmosphere system.
Background
The main constituent materials of the lithium ion battery include electrolyte, isolating material, anode and cathode materials and the like. The mass ratio of the positive electrode material to the negative electrode material in a large proportion is 3: 1-4: 1, the performance of the positive electrode material directly affects the performance of the lithium ion battery. In the production process of the lithium battery anode material, raw materials are required to be mixed according to a specific proportion, however, when lithium hydroxide monohydrate or other water-containing molecular raw materials are mixed, crystal water of the lithium hydroxide monohydrate or other water-containing molecular raw materials is separated out due to heat generated during mixing, so that the raw materials are agglomerated, the materials are adhered to the inner wall of a mixing machine, and then a series of problems of uneven material mixing, inaccurate weighing, inaccurate proportioning, inaccurate blanking and the like occur, so that the quality and the production efficiency of the lithium battery anode material are directly influenced.
Disclosure of Invention
An object of the utility model is to provide a simple structure just can reach the even, mixed dry atmosphere system of lithium cell cathode material production that reduces the material water content of compounding.
The purpose of the utility model is realized through the following technical scheme: a mixed drying atmosphere system for lithium battery anode material production comprises a plurality of storage bins, a plurality of automatic metering components arranged below the storage bins and correspondingly connected with the storage bins, a high-speed mixer connected with the automatic metering components and a drying atmosphere component connected with the high-speed mixer and used for drying materials in the high-speed mixer;
the high-speed mixer comprises a rack and a mixing component arranged on the rack; the mixing component comprises a mixing bin extending along the left-right direction; the top wall of the mixing bin is provided with an air inlet which is communicated with the inner cavity of the mixing bin and is connected with the drying atmosphere component and a dust collecting port which is communicated with the inner cavity of the mixing bin and is used for exhausting air, the air inlet is positioned at the left end of the top wall of the mixing bin, and the dust collecting port is positioned at the right end of the top wall of the mixing bin;
the drying atmosphere component comprises an air compressor and an air pressure pipe connected with the air compressor and the air inlet.
Compare prior art, the utility model has the advantages of:
1. this dry atmosphere system is mixed in lithium cell cathode material production is equipped with dry atmosphere subassembly and its high-speed mixer and is equipped with the air inlet of being connected with dry atmosphere subassembly and is used for carminative mouth that gathers dust for can continually let in dry gas in the high-speed mixer, dry the material in the blending bunker, prevent that the material adhesion from improving the material and mixing the effect at the blending bunker inner wall, and then promote lithium cell cathode material's quality.
2. Be equipped with humidity transducer in high-speed mixer's the blending bunker, let entire system can adjust the tolerance size of dry gas according to the humidity size that humidity transducer sensed.
3. This lithium battery cathode material production mixes dry atmosphere system collects the storage, weighs, mixes, the ejection of compact is as an organic whole, has improved material mixing efficiency and mixing accuracy greatly, is favorable to improving lithium battery cathode material's quality.
4. The mixing mechanism of the high-speed mixer of the utility model can stir the materials back and forth by the opposite helical blades instead of stirring along one direction when mixing the materials; this kind of circuitous stirring form has improved the stirring and has mixed the effect, trembles each material completely and scatters, prevents that the caking phenomenon from appearing.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a flow chart of the operation of the present invention.
FIG. 3 is a connection diagram of the high-speed mixer, the drying atmosphere component and the dust collector.
FIG. 4 is a schematic view of the structure of the helical blade set of the high-speed mixer.
Description of reference numerals: the device comprises a storage bin 1, an automatic metering component 2, a high-speed mixer 3, a frame 31, a mixing bin 321, a 3211 air inlet, a 3212 dust collecting port, a 32121 humidity sensor, a3213 feed port A, a 3214 feed port B, a 32141 cover, a 3215 discharge port, a 331 rotating shaft, a332 spiral blade group, a3321 spiral blade A, a 3322 spiral blade B, a 3323 spiral blade C, a 3324 connecting rod, a 33231 scraping sheet, a 333 motor, a 4 drying atmosphere component, a 41 air compressor, a 42 air pressure pipe, a 43 electromagnetic valve, a 44 regulating valve, a 45 freeze dryer, a 46 adsorption dryer, a 5 dust collector and a 6 discharging bin.
Detailed Description
The invention is described in detail below with reference to the drawings and examples of the specification:
fig. 1 to fig. 4 are schematic diagrams illustrating an embodiment of a system for producing a mixed dry atmosphere for a positive electrode material of a lithium battery according to the present invention.
The mixed drying atmosphere system for the lithium battery anode material production comprises a plurality of storage bins 1, a plurality of automatic metering components 2 which are arranged below the storage bins 1 and correspondingly connected with the storage bins 1, a high-speed mixer 3 connected with the automatic metering components 2 and a drying atmosphere component 4 which is connected with the high-speed mixer 3 and used for drying materials in the high-speed mixer 3;
the high-speed mixer 3 comprises a frame 31 and a mixing component arranged on the frame 31; the mixing component comprises a mixing bin 321 extending along the left-right direction; the top wall of the mixing bin 321 is provided with an air inlet 3211 communicated with the inner cavity of the mixing bin 321 and connected with the drying atmosphere component 4 and a dust collecting port 3212 communicated with the inner cavity of the mixing bin 321 and used for exhausting air, the air inlet 3211 is positioned at the left end of the top wall of the mixing bin 321, and the dust collecting port 3212 is positioned at the right end of the top wall of the mixing bin 321;
the mixing component also comprises a mixing mechanism arranged in the mixing bin 321; the mixing mechanism comprises a rotating shaft 331 arranged in the mixing bin 321 and extending along the left-right direction, a group of spiral blade sets 332 spirally surrounding the periphery of the rotating shaft 331 and extending along the axial direction of the rotating shaft 331, and a motor 333 for driving the rotating shaft 331 to rotate around the central axis of the rotating shaft 331;
the spiral blade group 332 comprises a spiral blade A3321, a spiral blade B3322 and a spiral blade C3323 which are sequentially distributed from inside to outside and have diameters arranged from small to large, wherein the spiral blade A3321, the spiral blade B3322 and the spiral blade C3323 are not overlapped in the axial front and back spatial positions of the rotating shaft 331, and the spiral blade A3321, the spiral blade B3322 and the spiral blade C3323 are respectively connected with the rotating shaft 331 through connecting rods 3324; the pitch of the helical blade B3322 is consistent with that of the helical blade C3323, and the rotation direction of the helical blade A3321 is opposite to that of the helical blade C3323.
The spiral blade A3321 and the spiral blade C3323 rotate in the same direction, the spiral blade B3322 and the spiral blade C3323 rotate in opposite directions, and the staggered rotation directions are opposite, so that materials are stirred back and forth by the opposite spiral blades instead of being stirred in one direction during stirring; this kind of circuitous stirring form has improved the stirring and has mixed the effect, trembles each material completely and scatters, prevents that the caking phenomenon from appearing.
The diameters of the helical blade a3321, the helical blade B3322 and the helical blade C3323 are increased from small to large, the helical blade a3321, the helical blade B3322 and the helical blade C3323 are staggered in the radial direction of the rotating shaft 331 with a certain gap, and relative to the radial cross section of the rotating shaft 331, the helical blade a3321, the helical blade B3322 and the helical blade C3323 are not overlapped in the axial front and rear spatial positions of the rotating shaft 331, so that the phenomena of mutual staggering and interference among the helical blade a3321, the helical blade B3322 and the helical blade C3323 are ensured, the helical blades are connected to the rotating shaft 331 through the connecting rod 3324, and the mixing effect of materials is further. In addition, the spiral blade set 332 can ensure that materials with large specific gravity or particle size difference can be fully and uniformly mixed and dispersed mutually, and prevent the occurrence of caking phenomenon.
The helical blade C3323 is provided with a plurality of scraping blades 33231 which are axially parallel to the rotating shaft 331. Scraping blade 33231 can scrape down the material that glues and cover in blending bunker 321 internal wall, guarantee that each material can mix according to preset's mixture ratio, and can not influence the mixture ratio because of blending bunker 321 adhesion, in addition, scraping blade 33231's setting has also further improved the mixed effect of material.
The dry atmosphere module 4 includes an air compressor 41 and an air pressure pipe 42 connecting the air compressor 41 and the air inlet 3211.
The drying atmosphere assembly 4 further comprises a freeze dryer 45 and an adsorption dryer 46 which are sequentially arranged on the pipeline of the air pressure pipe 42 along the gas flowing direction.
The air output from the air compressor 41 is dried by the freeze dryer 45 and the adsorption dryer 46 in this order. The dried air is introduced into the mixing bin 321 through the air inlet 3211, original water vapor in the mixing bin 321, crystal water (for example, crystal water is contained in lithium hydroxide which is a lithium ion anode material produced by high nickel) separated out due to frictional heat in the material mixing process and water vapor carried by the material to be mixed are removed, and the removed water vapor is rapidly discharged from the dust collecting port 3212, so that the material in the mixing bin 321 is dried, and the material is prevented from being adhered to the inner wall surface of the mixing bin 321, thereby causing uneven material mixing or unclean material discharge.
The air pressure pipe 42 is connected with the air inlet 3211 through a flange plate.
The dry atmosphere module 4 further comprises an electromagnetic valve 43 arranged on the pipeline of the air pressure pipe 42. The solenoid valve 43 is provided downstream of the adsorption dryer 46.
The drying atmosphere assembly 4 further comprises a regulating valve 44 arranged on the pipeline of the air pressure pipe 42; the regulating valve 44 is provided downstream of the solenoid valve 43 in the gas flow direction.
Automatic measurement subassembly 2 includes the measurement storehouse and locates the measurement screw rod of measurement storehouse below, is current equipment because of storage silo 1, automatic measurement subassembly 2, so the utility model discloses do not do the perusal to storage silo 1 and automatic measurement subassembly 2's structure. And a gate valve and a star-shaped feeding valve are sequentially arranged on a connecting pipeline of the storage bin 1 and the automatic metering component 2 from top to bottom.
The top wall of the mixing bin 321 is also provided with a feed inlet A3213 and a feed inlet B3214, wherein the feed inlet A3213 is communicated with the inner cavity of the mixing bin 321 and is connected with the automatic metering component 2; the diapire of blending bunker 321 is provided with discharge gate 3215.
The mixed drying atmosphere system for producing the lithium battery anode material further comprises a dust collector 5 connected with the dust collecting port 3212. The dust collector 5 can be any dust removing equipment commonly used in the industry, such as a bag type dust collector 5, an electric dust collector 5 and the like, so the utility model does not make much description on the structure of the dust collector 5.
A humidity sensor 32121 is arranged at the dust collecting port 3212.
Lithium cell cathode material production mix dry atmosphere system, it still includes the row of being connected bin 6 with high-speed mixer 3 discharge gate 3215.
A cover 32141 is arranged on the feed inlet B3214. A relay is arranged at the position of the cover 32141.
The whole mixed drying atmosphere system for producing the lithium battery anode material can be controlled by a PLC system; and all parts of the mixed dry atmosphere system for producing the lithium battery anode material are connected with the PLC system, and the running logic program is brushed into the system. The operation of the whole system for producing a mixed dry atmosphere for a lithium battery anode material is briefly described below by taking 2 storage bins 1 and 2 automatic metering assemblies 2 as examples:
the utility model discloses a lithium cell cathode material production mixes dry atmosphere system's operation flow is shown as figure 1, 2:
through manual or automatic conveying system, add two kinds of materials respectively in two storage silos 1, wait for the signal of next process. When a feeding request signal of the metering bin of the automatic metering assembly 2 is received, the gate valve below the storage bin 1 is opened, and materials enter the star-shaped feeding valve below the storage bin 1 through free falling body movement and then slowly enter the metering bin. When the metering bin obtains a feeding request signal, the metering screw below the metering bin starts to meter, a certain proportion of materials are mixed into the mixing bin 321, and the feeding precision reaches 0.01 kg. After metering is finished, the PLC system gives out light signals and prompts through a display screen to prompt that the additives need to be added manually. After the post personnel obtain the signal, the cover 32141 at the feed inlet B3214 on the mixing bin 321 is opened, and the additive is poured into the mixing bin 321. When the cover 32141 is closed, a relay on the cover 32141 gives a signal to automatically turn on the air compressor 41 and the solenoid valve 43 to start introducing dry gas into the mixing bin 321. After a post person presses an additive confirmation input button, a mixing bin 321 of the high-speed mixer 3 starts mixing according to the set rotating speed and time, and in the mixing process, a humidity sensor 32121 at a dust collection port 3212 of the mixing bin 321 automatically detects the humidity inside the mixing bin. The PLC system automatically acquires the PLC system according to the humidity obtained by the humidity sensor 32121 in the mixing bin 321, compares the humidity value with a set humidity value to obtain a deviation value, and calculates a value of 0-100 through PID (proportion integration differentiation), wherein the value is generally called a PO (proportional integral derivative) value, namely the opening degree of a valve to be adjusted. The PO value is converted into 4-20 mA to be output through an AO module, the opening degree of the adjusting valve 44 is adjusted, and the air volume of the drying air is automatically adjusted.
After the high-speed mixer 3 finishes mixing, when the mixing bin 321 obtains the feeding signal requested by the discharging bin 6, the electromagnetic valve 43 is closed, and the dry gas stops entering the mixing bin 321, so that the weighing accuracy of the discharging bin 6 is prevented from being influenced.
The traditional lithium battery anode material production mixing system such as a high-nickel production mixing system comprises a storage bin 1, an automatic metering component 2 and a high-speed mixer 3 which are connected in sequence, wherein a drying atmosphere component 4 formed by an air compressor 41, a freeze dryer 45, an adsorption dryer 46, an electromagnetic valve 43 and an adjusting valve 44 is not installed, after the materials are mixed by the traditional high-nickel production mixing system, a handheld humiture instrument is used by an inventor to detect that the water content of gas in a mixing bin 321 after mixing is about 17650ppmv, and the inner wall of the mixing bin 321 is adhered with the materials and is in a slurry state, so that the materials are mixed unevenly, the discharge is not clean, the proportioning is more likely to be inaccurate, and the product performance is influenced; and utilize the utility model discloses a lithium cell cathode material production mixes dry atmosphere system and carries out the material and mixes the back, uses the gas water content that same detecting instrument detected the same position of blending bunker 321 to be about 4940ppmv, and the interior material of blending bunker 321 is likepowder, does not appear gluing the wall and reunion phenomenon, and the material misce bene arranges the material normally, has guaranteed the quality of this process. Therefore, the utility model discloses a lithium cell cathode material production mixes dry atmosphere system, when the compounding, can dry the material in the blending bunker, prevents that the material adhesion from improving the material at the blending bunker inner wall and mixing the effect, and then promotes lithium cell cathode material's quality.
Claims (10)
1. The utility model provides a lithium cell cathode material produces mixed dry atmosphere system which characterized in that: the device comprises a plurality of storage bins (1), a plurality of automatic metering components (2) which are arranged below the storage bins (1) and correspondingly connected with the storage bins (1), a high-speed mixer (3) connected with the automatic metering components (2) and a drying atmosphere component (4) which is connected with the high-speed mixer (3) and is used for drying materials in the high-speed mixer (3);
the high-speed mixer (3) comprises a rack (31) and a mixing component arranged on the rack (31); the mixing component comprises a mixing bin (321) extending along the left-right direction; the top wall of the mixing bin (321) is provided with an air inlet (3211) communicated with the inner cavity of the mixing bin (321) and connected with the drying atmosphere component (4) and a dust collecting port (3212) communicated with the inner cavity of the mixing bin (321) and used for exhausting air, the air inlet (3211) is positioned at the left end of the top wall of the mixing bin (321), and the dust collecting port (3212) is positioned at the right end of the top wall of the mixing bin (321);
the drying atmosphere component (4) comprises an air compressor (41) and an air pressure air pipe (42) which is connected with the air compressor (41) and the air inlet (3211).
2. The lithium battery positive electrode material production mixed dry atmosphere system as claimed in claim 1, wherein: the dry atmosphere component (4) also comprises an electromagnetic valve (43) arranged on a pipeline of the air pressure pipe (42).
3. The lithium battery positive electrode material production mixed dry atmosphere system as claimed in claim 1, wherein: the drying atmosphere component (4) also comprises an adjusting valve (44) arranged on a pipeline of the air pressure pipe (42); the regulating valve (44) is arranged downstream of the solenoid valve (43) in the gas flow direction.
4. The lithium battery positive electrode material production mixed dry atmosphere system as claimed in claim 1, wherein: the top wall of the mixing bin (321) is also provided with a feed inlet A (3213) which is communicated with the inner cavity of the mixing bin (321) and is connected with the automatic metering component (2), and a feed inlet B (3214) for adding additives; the diapire of blending bunker (321) is provided with discharge gate (3215).
5. The lithium battery positive electrode material production mixed dry atmosphere system as claimed in claim 1, wherein: the dust collector also comprises a dust collector (5) connected with the dust collecting opening (3212).
6. The lithium battery positive electrode material production mixed dry atmosphere system as claimed in claim 1, wherein: and a humidity sensor (32121) is arranged at the dust collecting port (3212).
7. The lithium battery positive electrode material production mixed dry atmosphere system as claimed in claim 1, wherein: it also comprises a discharge bin (6) connected with a discharge hole (3215) of the high-speed mixer (3).
8. The lithium battery positive electrode material production mixed dry atmosphere system as claimed in claim 4, wherein: and a cover (32141) is arranged on the feed inlet B (3214).
9. The system for producing a mixed dry atmosphere for a positive electrode material of a lithium battery as claimed in any one of claims 1 to 8, wherein: the mixing component also comprises a mixing mechanism arranged in the mixing bin (321); the mixing mechanism comprises a rotating shaft (331) which is arranged in the mixing bin (321) and extends along the left-right direction, a group of spiral blade sets (332) which spirally surround the periphery of the rotating shaft (331) and axially extend along the rotating shaft (331), and a motor (333) which drives the rotating shaft (331) to rotate around the central axis of the motor;
the spiral blade group (332) comprises a spiral blade A (3321), a spiral blade B (3322) and a spiral blade C (3323) which are sequentially distributed from inside to outside and have diameters arranged from small to large, the spiral blade A (3321), the spiral blade B (3322) and the spiral blade C (3323) are not overlapped at the front and rear spatial positions in the axial direction of the rotating shaft (331), and the spiral blade A (3321), the spiral blade B (3322) and the spiral blade C (3323) are respectively connected with the rotating shaft (331) through connecting rods (33); the helical blade B (3322) and the helical blade C (3323) have the same pitch and opposite rotation directions, and the helical blade A (3321) and the helical blade C (3323) have the same rotation direction.
10. The mixed dry atmosphere system for producing a positive electrode material of a lithium battery as claimed in claim 9, wherein: the helical blade C (3323) is provided with a plurality of scraping sheets (33231) which are axially parallel to the rotating shaft (331).
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| CN202020380125.2U CN212409350U (en) | 2020-03-23 | 2020-03-23 | Mixed dry atmosphere system for lithium battery anode material production |
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| CN202020380125.2U CN212409350U (en) | 2020-03-23 | 2020-03-23 | Mixed dry atmosphere system for lithium battery anode material production |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114315375A (en) * | 2021-12-15 | 2022-04-12 | 湖南昌诺新材料有限公司 | Full-automatic production line of silicon carbide kiln furniture |
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- 2020-03-23 CN CN202020380125.2U patent/CN212409350U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114315375A (en) * | 2021-12-15 | 2022-04-12 | 湖南昌诺新材料有限公司 | Full-automatic production line of silicon carbide kiln furniture |
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