Graphene battery slurry grinding process

Abstract

The invention belongs to the technical field of battery processing, and particularly relates to a graphene battery slurry grinding process. The method comprises the following steps: 1, cooling graphene; step 2, cooling and then crushing the graphene; step 3, heating the crushed graphene and then pouring the graphene into a grinding cylinder; step 4, grinding the graphene in a grinding cylinder; step 5, adding a mixed reagent into the ground graphene to form slurry; and step 6, carrying out homogenization treatment on the graphene slurry, in the step 1, refrigerating graphene to-16 DEG C to-12 DEG C through a refrigerant, and in the step 3, heating the crushed graphene to 135 DEG C to 140 DEG C through a heater. The graphene slurry on the inner side of the homogenizing cylinder can be homogenized, and the uniformity of the graphene slurry is improved, so that the consistency and the stability of the chemical performance of the battery are ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of battery processing, in particular to a graphene battery slurry grinding process. Background Art

[0002] With the rapid development of renewable energy and electric vehicle markets, the demand for high-efficiency, long-life, and high-energy-density batteries is increasing. Although traditional lithium-ion batteries have excellent performance in energy density and cycle life, they still have limitations in cost, safety, and fast charging capabilities. Graphene, as a two-dimensional nanomaterial, is considered to be an ideal material for improving battery performance due to its excellent electrical conductivity, high specific surface area, and mechanical strength.

[0003] Graphene, a two-dimensional material composed of a single layer of carbon atoms arranged in a honeycomb pattern, has attracted widespread attention for its unique physical, chemical and mechanical properties since it was first successfully isolated in 2004. Graphene has extremely high electrical conductivity, thermal conductivity, mechanical strength and transparency, which makes it show great application potential in many fields such as electronic devices, composite materials, energy storage and biomedicine.

[0004] However, in conventional technology, after the graphene battery slurry is ground, graphene and other active materials are prone to agglomeration, which will affect the consistency and stability of the battery. Therefore, a graphene battery slurry grinding process is proposed to address the above problem. Summary of the invention

[0005] In order to make up for the deficiencies of the prior art and solve at least one technical problem raised in the background technology, the present invention proposes a graphene battery slurry grinding process.

[0006] The technical solution adopted by the present invention to solve the technical problem is: a graphene battery slurry grinding process described in the present invention comprises the following steps;

[0007] Step 1, cooling the graphene;

[0008] Step 2: crushing the graphene after cooling;

[0009] Step 3: heating the crushed graphene and then pouring it into a grinding cylinder;

[0010] Step 4: grinding the graphene in a grinding cylinder;

[0011] Step 5: adding the ground graphene to a mixed reagent to form a slurry;

[0012] Step six: homogenize the graphene slurry.

[0013] Preferably, in step one, the graphene is cooled to -16 degrees Celsius to -12 degrees Celsius by a refrigerant.

[0014] Preferably, in step three, the crushed graphene is heated by a heater to 135 degrees Celsius to 140 degrees Celsius.

[0015] Preferably, in the step 4, the crushed graphene enters the inner side of the grinding cylinder and comes between the first inner grinding body and the second outer grinding body, and the motor is started, the motor drives the first rotating shaft to rotate, the first rotating shaft drives the first inner grinding body to rotate, the first inner grinding body drives the first grinding teeth to rotate, and the graphene is ground for the first time under the cooperation of the first tooth groove;

[0016] After the first grinding, the graphene comes between the second inner grinding body and the first outer grinding body, and the first shaft is driven by the motor to rotate, the first shaft drives the second inner grinding body to rotate, the second inner grinding body drives the second grinding teeth to rotate, and with the cooperation of the second tooth groove, the graphene is ground for the second time. Since the tooth density of the second grinding teeth is greater than the tooth density of the first grinding teeth, the fineness of the graphene can be further improved during the second grinding process.

[0017] Preferably, in step five, the mixed reagent includes water and modified N,N-dimethylformamide, the modified N,N-dimethylformamide includes N,N-dimethylformamide and dimethylhydrazine, the mixing ratio of water and modified N,N-dimethylformamide is 7:3, and the mixing ratio of N,N-dimethylformamide and dimethylhydrazine is 8:2.

[0018] Preferably, in step six, after the graphene completes the addition of the mixed reagent, the motor is started again, the motor drives the first rotating shaft and the second rotating shaft to rotate, and the hydraulic cylinder is started, the hydraulic cylinder drives the push column to perform linear reciprocating motion, the push column drives the spring to contract, and the limit bar continuously moves to the bottom of the long groove to resist or separate, so that the second rotating shaft rises or falls, and during the rising or falling process of the second rotating shaft, the first homogenizing disk and the second homogenizing disk are driven to perform linear reciprocating motion together, so that the slurry inside the homogenizing cylinder is continuously screened by the guide column and the guide funnel, and the homogenization treatment of the graphene slurry is completed;

[0019] The graphene slurry comes from the flow hole to the bottom of the first homogenizing disk or the second homogenizing disk, and then the slurry below the first homogenizing disk or the second homogenizing disk is filtered to the top of the two through the guide column, and this cycle is repeated to make the graphene slurry more homogenized.

[0020] Preferably, it also includes a graphene battery slurry grinding device, the grinding device comprising:

[0021] A loading rack, wherein a homogenizing cylinder is fixedly arranged on the loading rack, a grinding cylinder is fixedly arranged on the top of the homogenizing cylinder, a sealing cover is fixedly arranged on the top of the grinding cylinder, and a feed port is opened on the sealing cover;

[0022] A first loading ring and a second loading ring are fixedly arranged on the inner side of the grinding cylinder, the second loading ring is located above the first loading ring, a second outer grinding body is arranged on the second loading ring, the inner side of the second outer grinding body is uniformly provided with first tooth grooves, the first outer grinding body is arranged on the first loading ring, and the inner side of the first outer grinding body is uniformly provided with second tooth grooves;

[0023] A motor is fixedly arranged on the top of the cover, and a first rotating shaft is fixedly arranged on the inner side of the grinding cylinder at the output end of the motor, and the first rotating shaft is fixedly connected to the first inner grinding body and the second inner grinding body, and the first inner grinding body is provided with first grinding teeth corresponding to the first tooth groove, and the second inner grinding body is provided with second grinding teeth corresponding to the second tooth groove;

[0024] A second rotating shaft is provided on the inner side of the homogenizing cylinder, the first rotating shaft is connected to the second rotating shaft, a first homogenizing disk and a second homogenizing disk are sequentially mounted on the second rotating shaft, guide columns are evenly provided on the first homogenizing disk and the second homogenizing disk, a guide funnel is fixedly provided on the top of the guide column, a cylindrical guide hole connected to the guide funnel is provided on the inner side of the guide column, a conical guide hole connected to the cylindrical guide hole is provided on the guide column and below the cylindrical guide hole, flow holes are evenly provided on the first homogenizing disk and the second homogenizing disk, a connecting ring is fixedly provided at the middle of the first homogenizing disk and the second homogenizing disk, the connecting ring is connected to the second rotating shaft, a hydraulic cylinder and a discharge pipe are provided at the bottom of the loading frame, and a solenoid valve is fixedly provided on the discharge pipe.

[0025] Preferably, the tooth density ratio of the first tooth groove to the second tooth groove is 3:4, and the tooth density ratio of the first grinding tooth to the second grinding tooth is 3:4.

[0026] Preferably, a limited connecting seat is fixedly provided on the inner side of the homogenizing cylinder, the first rotating shaft and the second rotating shaft are rotatably connected to the limited connecting seat, a mounting groove is provided at the bottom of the second rotating shaft, a spring is fixedly provided on the inner side of the mounting groove, long grooves are symmetrically provided on the second rotating shaft and located on the outer side of the spring, a sleeve is provided on the outer side of the bottom of the second rotating shaft, a push column is slidably provided on the inner side of the sleeve, a limiting strip matching the long groove is fixedly provided on the push column, the top of the push column is fixedly connected to the spring, the bottom of the sleeve is connected to the homogenizing cylinder, drainage plates are evenly provided on the outer side of the sleeve, and the hydraulic cylinder extends to the inner side of the sleeve and is connected to the push column.

[0027] Beneficial effects of the present invention:

[0028] The present invention provides a graphene battery slurry grinding process, wherein a first loading ring and a second loading ring fixedly arranged on the inner side of a grinding cylinder are respectively used to load a first outer grinding body and a second outer grinding body, the second outer grinding body arranged on the second loading ring is used to load a first tooth groove, the first tooth groove evenly arranged on the inner side of the second outer grinding body is used for grinding graphene, the first outer grinding body arranged on the first loading ring is used to load the second tooth groove, and the second tooth groove evenly arranged on the inner side of the first outer grinding body is used for secondary grinding of graphene, thereby improving the fineness of graphene.

[0029] The present invention provides a graphene battery slurry grinding process. After the graphene completes the addition of the mixed reagent, the motor is started again, the motor drives the first rotating shaft and the second rotating shaft to rotate, and the hydraulic cylinder is started. The hydraulic cylinder drives the push column to perform linear reciprocating motion, the push column drives the spring to contract, and the limit bar continuously moves to the bottom of the long groove to resist or separate, so that the second rotating shaft rises or falls. During the rising or falling process of the second rotating shaft, the first homogenizing disk and the second homogenizing disk are driven to perform linear reciprocating motion together, so that the slurry inside the homogenizing cylinder is continuously screened by the guide column and the guide funnel, and the homogenization treatment of the graphene slurry is completed. The graphene slurry comes from the flow hole to the bottom of the first homogenizing disk or the second homogenizing disk, and then the slurry below the first homogenizing disk or the second homogenizing disk is screened to the top of the two through the guide column, and the cycle is repeated, so that the graphene slurry is more homogenized;

[0030] This allows the graphene slurry inside the homogenizing cylinder to be homogenized and its uniformity to be improved, thereby ensuring the consistency and stability of the battery's chemical properties. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings described herein are used to provide further understanding of the present invention and constitute a part of this application. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0032] In the attached picture:

[0033] Figure 1 It is a process flow chart of the present invention;

[0034] Figure 2 It is a schematic diagram of the structure of the grinding cylinder in the present invention;

[0035] Figure 3 It is a structural schematic diagram of the homogenizing cylinder in the present invention;

[0036] Figure 4 It is a schematic diagram of the internal structure of the homogenizing cylinder in the present invention;

[0037] Figure 5 It is a schematic structural diagram of the first homogenizing disk in the present invention;

[0038] Figure 6 It is a structural schematic diagram of the push column in the present invention;

[0039] Figure 7 It is a schematic diagram of the structure of the flow hole in the present invention;

[0040] Figure 8 It is a structural schematic diagram of the guide column in the present invention;

[0041] Fig. 9 It is a schematic cross-sectional view of the structure of the guide column in the present invention.

[0042] Legend:

[0043] 1. Loading rack; 2. Homogenizing cylinder; 3. Grinding cylinder; 4. Sealing cap; 5. Motor; 6. Feeding port; 7. Hydraulic cylinder; 8. Discharging pipe; 9. Solenoid valve; 10. Limiting connection seat; 11. First rotating shaft; 12. Second rotating shaft; 13. First inner grinding body; 14. Second inner grinding body; 15. First grinding teeth; 16. Second grinding teeth; 17. First loading ring; 18. First outer grinding body; 19. Second Loading ring; 20, second outer grinding body; 21, first tooth groove; 22, second tooth groove; 23, first homogenizing disk; 24, second homogenizing disk; 25, guide column; 26, guide funnel; 27, connecting ring; 28, flow hole; 29, cylindrical guide hole; 30, conical guide hole; 31, mounting groove; 32, spring; 33, long groove; 34, push column; 35, limit strip; 36, sleeve; 37, drainage plate. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] Specific examples are given below.

[0046] Example 1

[0047] See also Figure 1-Figure 9 , the present invention provides a graphene battery slurry grinding process, comprising the following steps;

[0048] Step 1, cooling the graphene;

[0049] Step 2: crushing the graphene after cooling;

[0050] Step 3: heating the crushed graphene and then pouring it into the grinding cylinder 3;

[0051] Step 4: grinding the graphene in the grinding cylinder 3;

[0052] Step 5: adding the ground graphene to a mixed reagent to form a slurry;

[0053] Step 6: homogenizing the graphene slurry;

[0054] During operation, in step 1 and step 2, graphene has strong toughness and elasticity at room temperature and is not easily completely broken by traditional mechanical crushing methods, while cooling treatment can significantly reduce the toughness of the material, making it more fragile;

[0055] In step 2, at 135 to 140 degrees Celsius, the electrostatic force on the graphene surface is reduced, and the stacking state between the sheets is alleviated, which is conducive to interlayer peeling during subsequent grinding, and the dried graphene is lighter and easier to flow, thereby improving processing efficiency;

[0056] In step 4, the crushed graphene enters the inner side of the grinding cylinder 3 and comes between the first inner grinding body 13 and the second outer grinding body 20. By starting the motor 5, the motor 5 drives the first rotating shaft 11 to rotate, the first rotating shaft 11 drives the first inner grinding body 13 to rotate, the first inner grinding body 13 drives the first grinding teeth 15 to rotate, and with the cooperation of the first tooth groove 21, the graphene is ground for the first time;

[0057] After the first grinding, the graphene comes between the second inner grinding body 14 and the first outer grinding body 18, and the first rotating shaft 11 is driven by the motor 5 to rotate, the first rotating shaft 11 drives the second inner grinding body 14 to rotate, and the second inner grinding body 14 drives the second grinding teeth 16 to rotate, and the second tooth grooves 22 cooperate to realize the second grinding of the graphene. Since the tooth density of the second grinding teeth 16 is greater than the tooth density of the first grinding teeth 15, the fineness of the graphene can be further improved during the second grinding process;

[0058] In step five, the modified N,N-dimethylformamide combines with water to dissolve some water-soluble and organic-soluble substances while reducing the incompatibility of the solvent. The addition of dimethylhydrazine provides additional reaction sites, thereby accelerating the reaction rate.

[0059] In step six, after the graphene completes the addition of the mixed reagent, the motor 5 is started again, the motor 5 drives the first rotating shaft 11 and the second rotating shaft 12 to rotate, and the hydraulic cylinder 7 is started, the hydraulic cylinder 7 drives the push column 34 to perform linear reciprocating motion, the push column 34 drives the spring 32 to contract, and the limit bar 35 continuously moves to the bottom of the long groove 33 to resist or separate, so that the second rotating shaft 12 rises or falls, and in the process of the second rotating shaft 12 rising or falling, the first homogenizing disk 23 and the second homogenizing disk 24 are driven to perform linear reciprocating motion together, so that the slurry inside the homogenizing cylinder 2 is continuously screened by the guide column 25 and the guide funnel 26, and the homogenization treatment of the graphene slurry is completed;

[0060] The graphene slurry comes from the flow hole 28 to the bottom of the first homogenizing disk 23 or the second homogenizing disk 24, and then passes through the guide column 25 to filter the slurry below the first homogenizing disk 23 or the second homogenizing disk 24 to the top of the two. This cycle is repeated to make the graphene slurry more homogenized and improve its uniformity, thereby ensuring the consistency and stability of the battery's chemical properties.

[0061] Further, such as Figure 1 As shown, in step one, the graphene is cooled to -16 degrees Celsius to -12 degrees Celsius by a refrigerant;

[0062] During operation, the graphene is cooled to -16 degrees Celsius to -12 degrees Celsius to ensure that its quality remains unchanged and the purpose of crushing is achieved. The refrigerant used is an inorganic compound refrigerant, such as ammonia.

[0063] Further, such as Figure 1 As shown, in step three, the crushed graphene is heated by a heater to 135 degrees Celsius to 140 degrees Celsius;

[0064] When working, heating can effectively remove moisture and certain volatile impurities in graphene, the presence of which may reduce the purity and performance of graphene, so the quality of the final product can be improved through heat treatment.

[0065] Further, such as Figure 4 As shown, in step 4, the crushed graphene enters the inner side of the grinding cylinder 3 and comes between the first inner grinding body 13 and the second outer grinding body 20. By starting the motor 5, the motor 5 drives the first rotating shaft 11 to rotate, the first rotating shaft 11 drives the first inner grinding body 13 to rotate, the first inner grinding body 13 drives the first grinding teeth 15 to rotate, and with the cooperation of the first tooth groove 21, the graphene is ground for the first time;

[0066] After the first grinding, the graphene comes between the second inner grinding body 14 and the first outer grinding body 18, and the first rotating shaft 11 is driven by the motor 5 to rotate, the first rotating shaft 11 drives the second inner grinding body 14 to rotate, and the second inner grinding body 14 drives the second grinding teeth 16 to rotate, and with the cooperation of the second tooth grooves 22, the graphene is ground for the second time. Since the tooth density of the second grinding teeth 16 is greater than the tooth density of the first grinding teeth 15, the fineness of the graphene can be further improved during the second grinding process.

[0067] Further, such as Figure 1 As shown, in step five, the mixed reagents include water and modified N,N-dimethylformamide, the modified N,N-dimethylformamide includes N,N-dimethylformamide and dimethylhydrazine, the mixing ratio of water and modified N,N-dimethylformamide is 7:3, and the mixing ratio of N,N-dimethylformamide and dimethylhydrazine is 8:2.

[0068] Further, such as Figure 4 and Figure 5 As shown, in step six, after the addition of the mixed reagent to the graphene is completed, the motor 5 is started again, the motor 5 drives the first rotating shaft 11 and the second rotating shaft 12 to rotate, and the hydraulic cylinder 7 is started, the hydraulic cylinder 7 drives the push column 34 to perform linear reciprocating motion, the push column 34 drives the spring 32 to contract, and the limit bar 35 continuously moves to the bottom of the long groove 33 to resist or separate, so that the second rotating shaft 12 rises or falls, and during the rising or falling process of the second rotating shaft 12, the first homogenizing disk 23 and the second homogenizing disk 24 are driven to perform linear reciprocating motion together, so that the slurry inside the homogenizing cylinder 2 is continuously screened by the guide column 25 and the guide funnel 26, and the homogenization treatment of the graphene slurry is completed;

[0069] The graphene slurry flows from the flow hole 28 to the bottom of the first homogenizing disk 23 or the second homogenizing disk 24, and then the slurry below the first homogenizing disk 23 or the second homogenizing disk 24 is filtered to the top of the two through the guide column 25, and this cycle is repeated to make the graphene slurry more homogenized.

[0070] Further, such as Figure 2-9 As shown, it also includes a graphene battery slurry grinding device, and the grinding device includes:

[0071] A loading frame 1, on which a homogenizing cylinder 2 is fixedly arranged, a grinding cylinder 3 is fixedly arranged on the top of the homogenizing cylinder 2, a sealing cover 4 is fixedly arranged on the top of the grinding cylinder 3, and a feed port 6 is opened on the sealing cover 4;

[0072] A first loading ring 17 and a second loading ring 19 are fixedly arranged on the inner side of the grinding cylinder 3. The second loading ring 19 is located above the first loading ring 17. A second outer grinding body 20 is arranged on the second loading ring 19. The inner side of the second outer grinding body 20 is evenly provided with first tooth grooves 21. A first outer grinding body 18 is arranged on the first loading ring 17. The inner side of the first outer grinding body 18 is evenly provided with second tooth grooves 22.

[0073] A motor 5 is fixedly arranged on the top of the cover 4, and a first rotating shaft 11 is fixedly arranged on the inner side of the grinding cylinder 3 at the output end of the motor 5, and the first rotating shaft 11 is fixedly connected with a first inner grinding body 13 and a second inner grinding body 14, and a first grinding tooth 15 corresponding to the first tooth groove 21 is arranged on the first inner grinding body 13, and a second grinding tooth 16 corresponding to the second tooth groove 22 is arranged on the second inner grinding body 14;

[0074] A second rotating shaft 12 is arranged on the inner side of the homogenizing cylinder 2, the first rotating shaft 11 is connected to the second rotating shaft 12, a first homogenizing disk 23 and a second homogenizing disk 24 are sequentially mounted on the second rotating shaft 12, a guide column 25 is evenly arranged on the first homogenizing disk 23 and the second homogenizing disk 24, a guide funnel 26 is fixedly arranged on the top of the guide column 25, a cylindrical guide hole 29 connected to the guide funnel 26 is opened on the inner side of the guide column 25, a conical guide hole 30 connected to the cylindrical guide hole 29 is opened on the guide column 25 and located below the cylindrical guide hole 29, a flow hole 28 is evenly opened on the first homogenizing disk 23 and the second homogenizing disk 24, a connecting ring 27 is fixedly arranged in the middle of the first homogenizing disk 23 and the second homogenizing disk 24, and the connecting ring 27 is connected to the second rotating shaft 12, a hydraulic cylinder 7 and a discharge pipe 8 are arranged at the bottom of the loading frame 1, and a solenoid valve 9 is fixedly arranged on the discharge pipe 8;

[0075] During operation, the loading rack 1 is used to load the homogenizing cylinder 2, the homogenizing cylinder 2 fixedly arranged on the loading rack 1 is used to homogenize the graphene slurry, the grinding cylinder 3 fixedly arranged on the top of the homogenizing cylinder 2 is used to grind the graphene, the sealing cover 4 fixedly arranged on the top of the grinding cylinder 3 is used to package the device, and the feeding port 6 opened on the sealing cover 4 is used to feed the graphene;

[0076] The first loading ring 17 and the second loading ring 19 fixedly arranged on the inner side of the grinding cylinder 3 are used to load the first outer grinding body 18 and the second outer grinding body 20 respectively, the second outer grinding body 20 arranged on the second loading ring 19 is used to load the first tooth groove 21, and the first tooth groove 21 evenly arranged on the inner side of the second outer grinding body 20 is used for grinding graphene, the first outer grinding body 18 arranged on the first loading ring 17 is used to load the second tooth groove 22, and the second tooth groove 22 evenly arranged on the inner side of the first outer grinding body 18 is used for secondary grinding of graphene to improve the fineness of graphene;

[0077] The motor 5 fixedly arranged on the top of the cover 4 is used to drive the first rotating shaft 11 and the second rotating shaft 12 to rotate. The first rotating shaft 11 fixedly arranged on the inner side of the grinding cylinder 3 extending through the output end of the motor 5 is used to drive the first inner grinding body 13 and the second inner grinding body 14 to rotate. The first grinding teeth 15 corresponding to the first tooth grooves 21 are arranged on the first inner grinding body 13 to cooperate with the first tooth grooves 21 to complete the primary grinding of graphene. The second grinding teeth 16 corresponding to the second tooth grooves 22 are arranged on the second inner grinding body 14 to cooperate with the second tooth grooves 22 to complete the secondary grinding of graphene.

[0078] The second rotating shaft 12 arranged on the inner side of the homogenizing barrel 2 is used to drive the first homogenizing disc 23 and the second homogenizing disc 24 to rotate and complete the homogenization of the graphene slurry. The first homogenizing disc 23 and the second homogenizing disc 24 sequentially installed on the second rotating shaft 12 are used to homogenize the graphene slurry inside the homogenizing barrel 2 to improve its uniformity, thereby ensuring the quality of the product. The guide columns 25 evenly arranged on the first homogenizing disc 23 and the second homogenizing disc 24 are used for loading the guide funnel 26 on the one hand, and for reflux of the slurry below the first homogenizing disc 23 or the second homogenizing disc 24 on the other hand. The guide funnel 26 fixedly arranged on the top of the guide column 25 is used to assist in stirring the graphene slurry in the homogenizing barrel 2, and enables the slurry below the first homogenizing disc 23 or the second homogenizing disc 24 to have a reflux channel, thereby preventing the slurry below the first homogenizing disc 23 or the second homogenizing disc 24 from being blocked and failing to reflux;

[0079] The cylindrical guide hole 29 connected to the guide funnel 26 is opened on the inner side of the guide column 25, and the conical guide hole 30 connected to the cylindrical guide hole 29 is opened on the guide column 25 and located below the cylindrical guide hole 29, so that the slurry below the first homogenizing disk 23 or the second homogenizing disk 24 can be refluxed and filtered during the downward movement of the graphene slurry. The flow holes 28 evenly opened on the first homogenizing disk 23 and the second homogenizing disk 24 are used for the graphene slurry to enter the first homogenizing disk 23 or the second homogenizing disk 24. 4, the sieving is completed, the connecting ring 27 fixedly arranged in the middle of the first homogenizing disk 23 and the second homogenizing disk 24 is used to connect the first homogenizing disk 23 or the second homogenizing disk 24 with the second rotating shaft 12, the hydraulic cylinder 7 arranged at the bottom of the loading frame 1 is used to drive the push column 34 and the limit bar 35 to move linearly back and forth inside the sleeve 36, the discharge pipe 8 is used for discharging the graphene slurry, and the solenoid valve 9 fixedly arranged on the discharge pipe 8 is used to start and stop the circulation of the graphene slurry inside the discharge pipe 8.

[0080] Further, such as Figure 4 As shown, the tooth density ratio of the first tooth groove 21 to the second tooth groove 22 is 3:4, and the tooth density ratio of the first grinding tooth 15 to the second grinding tooth 16 is 3:4;

[0081] During operation, since the tooth density ratio of the first tooth groove 21 and the second tooth groove 22 is 3:4, and the tooth density ratio of the first grinding tooth 15 and the second grinding tooth 16 is 3:4, in this case, the graphene is ground twice, and the second grinding has a higher fineness than the first grinding, so as to facilitate the subsequent formation and homogenization of the graphene slurry.

[0082] Further, such as Figure 4 As shown, a limited connection seat 10 is fixedly provided on the inner side of the homogenizing cylinder 2, the first rotating shaft 11 and the second rotating shaft 12 are both rotatably connected to the limited connection seat 10, a mounting groove 31 is provided at the bottom of the second rotating shaft 12, a spring 32 is fixedly provided on the inner side of the mounting groove 31, a long groove 33 is symmetrically provided on the second rotating shaft 12 and located on the outer side of the spring 32, a sleeve 36 is sleeved on the outer side of the bottom of the second rotating shaft 12, a push column 34 is slidably provided on the inner side of the sleeve 36, a limit strip 35 adapted to the long groove 33 is fixedly provided on the push column 34, the top of the push column 34 is fixedly connected to the spring 32, the bottom of the sleeve 36 is connected to the homogenizing cylinder 2, the outer side of the sleeve 36 is evenly provided with drainage sheets 37, and the hydraulic cylinder 7 extends to the inner side of the sleeve 36 and is connected to the push column 34.

[0083] During operation, the limiting connecting seat 10 fixedly arranged on the inner side of the homogenizing cylinder 2 is used to limit the first rotating shaft 11 and the second rotating shaft 12 to ensure the stability of the first rotating shaft 11 and the second rotating shaft 12 when rotating. The mounting groove 31 opened at the bottom of the second rotating shaft 12 is used to load the spring 32. The spring 32 fixedly arranged on the inner side of the mounting groove 31 is used to store and release energy when sliding between the sleeve 36 and the long groove 33. The long groove 33 symmetrically opened on the second rotating shaft 12 and located on the outer side of the spring 32 is used to limit the limiting strip 35. The sleeve sleeved on the outer side of the bottom of the second rotating shaft 12 is used to prevent the limiting strip 35 from sliding. The tube 36 is used to load the drainage sheet 37. The push column 34 slidingly arranged on the inner side of the sleeve 36 is used to drive the second rotating shaft 12 to move back and forth in a straight line, so that the device can homogenize the graphene slurry inside the homogenizing cylinder 2. The limit strip 35 matched with the long groove 33 is fixedly arranged on the push column 34 to limit the movement range of the push column 34, so that the push column 34 can drive the second rotating shaft 12 to move vertically back and forth when rotating. The drainage sheets 37 evenly arranged on the outer side of the sleeve 36 are used to assist the outflow of the graphene slurry to prevent it from accumulating at the bottom of the homogenizing cylinder 2.

[0084] Example 2

[0085] During the grinding process of graphene battery slurry, the processing technology is as follows:

[0086] Step 1: Cooling the graphene to -16 degrees Celsius by ammonia;

[0087] Step 2: After cooling, the graphene is crushed, and the crushed graphene is heated by a heater to 135 degrees Celsius;

[0088] Step 3: heat the crushed graphene and pour it into the grinding cylinder 3 to improve its fineness;

[0089] Step 4: grinding the graphene in the grinding cylinder 3;

[0090] Step 5: adding a mixed reagent to the ground graphene to form a slurry, wherein the mixed reagent includes water and modified N,N-dimethylformamide, wherein the modified N,N-dimethylformamide includes N,N-dimethylformamide and dimethylhydrazine, wherein the mixing ratio of the water to the modified N,N-dimethylformamide is 7:3, and the mixing ratio of the N,N-dimethylformamide to dimethylhydrazine is 8:2;

[0091] Step six: homogenize the graphene slurry.

[0092] At this point, graphene slurry is obtained. The stability of the slurry is evaluated by observing the sedimentation of solid particles in the slurry. If the slurry has good stability, the particles will settle very slowly or almost not at all.

[0093] Example 3

[0094] During the grinding process of graphene battery slurry, the processing technology is as follows:

[0095] Step 1: Cooling the graphene to -12 degrees Celsius by ammonia;

[0096] Step 2: After cooling, the graphene is crushed, and the crushed graphene is heated by a heater to 140 degrees Celsius;

[0097] Step 3: heat the crushed graphene and pour it into the grinding cylinder 3 to improve its fineness;

[0098] Step 4: grinding the graphene in the grinding cylinder 3;

[0099] Step 5: adding a mixed reagent to the ground graphene to form a slurry, wherein the mixed reagent includes water and modified N,N-dimethylformamide, wherein the modified N,N-dimethylformamide includes N,N-dimethylformamide and dimethylhydrazine, wherein the mixing ratio of the water to the modified N,N-dimethylformamide is 7:3, and the mixing ratio of the N,N-dimethylformamide to dimethylhydrazine is 8:2;

[0100] Step six: homogenize the graphene slurry.

[0101] Thus, the graphene slurry is obtained. The graphene slurry prepared in this embodiment is also observed by the observation method. The dispersibility of the graphene slurry prepared in this embodiment and the graphene slurry in Example 2 is almost the same.

[0102] Comparative Example 1

[0103] During the grinding process of graphene battery slurry, the processing technology is as follows:

[0104] Step 1: Cooling the graphene to -16 degrees Celsius by ammonia;

[0105] Step 2: After cooling, the graphene is crushed, and the crushed graphene is heated by a heater to 135 degrees Celsius;

[0106] Step 3: heat the crushed graphene and pour it into the grinding cylinder 3 to improve its fineness;

[0107] Step 4: grinding the graphene in the grinding cylinder 3;

[0108] Step 5: Add a mixed reagent to the ground graphene to form a slurry, wherein the mixed reagent includes water and modified N,N-dimethylformamide, wherein the modified N,N-dimethylformamide includes N,N-dimethylformamide and dimethylhydrazine, and the mixing ratio of the water and the modified N,N-dimethylformamide is 7:3, and the mixing ratio of the N,N-dimethylformamide and dimethylhydrazine is 8:2.

[0109] Since the graphene slurry produced in this comparative example has not been homogenized, the graphene is observed after being left to stand by observation, and the agglomeration area per unit is greater than 60%, and its dispersion is poor.

[0110] Comparative Example 2

[0111] Step 1: Cooling the graphene to -16 degrees Celsius by ammonia;

[0112] Step 2: After cooling, the graphene is crushed, and the crushed graphene is heated by a heater to 135 degrees Celsius;

[0113] Step 3: heat the crushed graphene and pour it into the grinding cylinder 3 to improve its fineness;

[0114] Step 4: adding a mixed reagent to the ground graphene to form a slurry, wherein the mixed reagent includes water and modified N,N-dimethylformamide, wherein the modified N,N-dimethylformamide includes N,N-dimethylformamide and dimethylhydrazine, wherein the mixing ratio of the water to the modified N,N-dimethylformamide is 7:3, and the mixing ratio of the N,N-dimethylformamide to dimethylhydrazine is 8:2;

[0115] Step 5: homogenize the graphene slurry.

[0116] Since the graphene slurry produced in this comparative example has not been ground, the graphene is observed after being left to stand by observation, and the agglomeration area per unit is greater than 70%, and its dispersibility is poor.

[0117] Example 2 Example 3 Comparative Example 1 Comparative Example 2 Dispersion (Observational method) excellent excellent Difference Difference

[0118] Conclusion: After grinding and homogenization, this device can greatly improve the dispersibility of graphene slurry, so that the graphene slurry inside the homogenizing cylinder can be homogenized to improve its uniformity, thereby ensuring the consistency and stability of the battery's chemical properties.

[0119] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A graphene battery slurry grinding process, characterized in that: The steps include: Step 1, cooling the graphene; Step 2: crushing the graphene after cooling; Step 3, heating the crushed graphene and then pouring it into the grinding cylinder (3); Step 4: grinding the graphene in a grinding cylinder (3); Step 5: adding the ground graphene to a mixed reagent to form a slurry; Step six: homogenize the graphene slurry.

2. A graphene battery slurry grinding process according to claim 1, characterized in that: In the step 1, the graphene is cooled to -16 degrees Celsius to -12 degrees Celsius by a refrigerant.

3. A graphene battery slurry grinding process according to claim 1, characterized in that: In the step three, the crushed graphene is heated by a heater to 135 degrees Celsius to 140 degrees Celsius.

4. A graphene battery slurry grinding process according to claim 1, characterized in that: In the fourth step, the crushed graphene enters the inner side of the grinding cylinder (3) and comes between the first inner grinding body (13) and the second outer grinding body (20). By starting the motor (5), the motor (5) drives the first rotating shaft (11) to rotate, the first rotating shaft (11) drives the first inner grinding body (13) to rotate, the first inner grinding body (13) drives the first grinding teeth (15) to rotate, and with the cooperation of the first tooth groove (21), the graphene is ground for the first time; After the first grinding, the graphene is brought between the second inner grinding body (14) and the first outer grinding body (18), and the first rotating shaft (11) is driven by the motor (5) to rotate, the first rotating shaft (11) drives the second inner grinding body (14) to rotate, the second inner grinding body (14) drives the second grinding teeth (16) to rotate, and with the cooperation of the second tooth grooves (22), the graphene is ground for a second time. Since the tooth density of the second grinding teeth (16) is greater than the tooth density of the first grinding teeth (15), the fineness of the graphene can be further improved during the second grinding process.

5. The graphene battery slurry grinding process according to claim 1, characterized in that: In step five, the mixed reagent includes water and modified N,N-dimethylformamide, the modified N,N-dimethylformamide includes N,N-dimethylformamide and dimethylhydrazine, the mixing ratio of water and modified N,N-dimethylformamide is 7:3, and the mixing ratio of N,N-dimethylformamide and dimethylhydrazine is 8:

2.

6. A graphene battery slurry grinding process according to claim 1, characterized in that: In step six, after the graphene has finished adding the mixed reagent, the motor (5) is started again, the motor (5) drives the first rotating shaft (11) and the second rotating shaft (12) to rotate, and the hydraulic cylinder (7) is started, the hydraulic cylinder (7) drives the push column (34) to perform linear reciprocating motion, the push column (34) drives the spring (32) to contract, and the limit bar (35) continuously moves to the bottom of the long groove (33) to resist or separate, so that the second rotating shaft (12) rises or falls, and in the process of the second rotating shaft (12) rising or falling, the first homogenizing disk (23) and the second homogenizing disk (24) are driven to perform linear reciprocating motion together, so that the slurry inside the homogenizing cylinder (2) is continuously screened by the guide column (25) and the guide funnel (26), and the homogenization treatment of the graphene slurry is completed; The graphene slurry flows from the flow hole (28) to the bottom of the first homogenizing disk (23) or the second homogenizing disk (24), and then the slurry below the first homogenizing disk (23) or the second homogenizing disk (24) is filtered to the top of the two through the guide column (25), and this cycle is repeated to make the graphene slurry more homogenized.

7. A graphene battery slurry grinding process according to any one of claims 1 to 6, characterized in that: Also included is a graphene battery slurry grinding device, the grinding device comprising: A loading frame (1), wherein a homogenizing cylinder (2) is fixedly arranged on the loading frame (1), a grinding cylinder (3) is fixedly arranged on the top of the homogenizing cylinder (2), a sealing cover (4) is fixedly arranged on the top of the grinding cylinder (3), and a feed port (6) is opened on the sealing cover (4); A first loading ring (17) and a second loading ring (19) are fixedly arranged on the inner side of the grinding cylinder (3); the second loading ring (19) is located above the first loading ring (17); a second outer grinding body (20) is arranged on the second loading ring (19); the inner side of the second outer grinding body (20) is evenly provided with first tooth grooves (21); a first outer grinding body (18) is arranged on the first loading ring (17); the inner side of the first outer grinding body (18) is evenly provided with second tooth grooves (22); A motor (5) is fixedly arranged on the top of the cover (4); a first rotating shaft (11) is fixedly arranged on the inner side of the grinding cylinder (3) at the output end of the motor (5); the first rotating shaft (11) is fixedly connected to the first inner grinding body (13) and the second inner grinding body (14); the first inner grinding body (13) is provided with first grinding teeth (15) corresponding to the first tooth grooves (21); and the second inner grinding body (14) is provided with second grinding teeth (16) corresponding to the second tooth grooves (22); A second rotating shaft (12) is arranged on the inner side of the homogenizing cylinder (2); the first rotating shaft (11) is connected to the second rotating shaft (12); a first homogenizing disk (23) and a second homogenizing disk (24) are sequentially mounted on the second rotating shaft (12); flow guide columns (25) are evenly arranged on the first homogenizing disk (23) and the second homogenizing disk (24); a flow guide funnel (26) is fixedly arranged on the top of the flow guide column (25); a columnar flow guide hole (29) connected to the flow guide funnel (26) is opened on the inner side of the flow guide column (25); 5) and is located below the columnar flow guide hole (29), a conical flow guide hole (30) connected to the columnar flow guide hole (29) is provided, the first homogenizing disk (23) and the second homogenizing disk (24) are evenly provided with flow holes (28), a connecting ring (27) is fixedly provided in the middle of the first homogenizing disk (23) and the second homogenizing disk (24), the connecting ring (27) is connected to the second rotating shaft (12), a hydraulic cylinder (7) and a discharge pipe (8) are provided at the bottom of the loading frame (1), and a solenoid valve (9) is fixedly provided on the discharge pipe (8).

8. A graphene battery slurry grinding process according to claim 7, characterized in that: The tooth density ratio of the first tooth groove (21) to the second tooth groove (22) is 3:4, and the tooth density ratio of the first grinding tooth (15) to the second grinding tooth (16) is 3:

4.

9. A graphene battery slurry grinding process according to claim 7, characterized in that: A limited connection seat (10) is fixedly arranged on the inner side of the homogenizing cylinder (2); the first rotating shaft (11) and the second rotating shaft (12) are both rotatably connected to the limited connection seat (10); a mounting groove (31) is provided at the bottom of the second rotating shaft (12); a spring (32) is fixedly arranged on the inner side of the mounting groove (31); a long groove (33) is symmetrically provided on the second rotating shaft (12) and located on the outer side of the spring (32); a sleeve is sleeved on the outer side of the bottom of the second rotating shaft (12) (36), a push column (34) is slidably arranged on the inner side of the sleeve (36), a limit strip (35) adapted to the long groove (33) is fixedly arranged on the push column (34), the top of the push column (34) is fixedly connected to the spring (32), the bottom of the sleeve (36) is connected to the homogenizing cylinder (2), the outer side of the sleeve (36) is evenly provided with drainage plates (37), and the hydraulic cylinder (7) extends to the inner side of the sleeve (36) and is connected to the push column (34).

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