Graphene battery slurry dispersing equipment and method

Abstract

The invention relates to the field of graphene battery slurry processing, in particular to graphene battery slurry dispersing equipment and method, and the graphene battery slurry dispersing equipment comprises a polishing unit and a flowing unit located below the polishing unit; the grinding unit comprises a grinding disc, a driving mechanism for driving the grinding disc to move and a graphene block fixing frame, and the graphene block fixing frame is opposite to the grinding disc; the flowing unit comprises a flowing part, and an opening is formed in the top of the flowing part and at least located below the grinding disc. According to the scheme, the problem that the graphene powder added into the slurry is not easy to disperse is solved.

Description

Technical Field

[0001] This invention relates to the field of graphene battery slurry processing, specifically to graphene battery slurry dispersion equipment and methods. Background Technology

[0002] In existing technologies, lithium-ion battery anode sheets include a current collector and a slurry layer. The current collector is a copper foil, and the slurry is coated on the copper foil. After the slurry dries, it adheres and is fixed on the copper foil to form a slurry layer. To improve the electrical performance of lithium-ion battery anode sheets, some graphene powder is added to the slurry, thereby reducing the battery's internal resistance and improving rate performance and cycle life.

[0003] Currently, the mixing method for graphene powder and slurry involves pouring the bagged graphene powder and slurry together into a container, then stirring the slurry to ensure a uniform mixture. However, due to the strong intermolecular forces of graphene, the powder is prone to agglomeration. Therefore, when a large amount of graphene powder is added to the slurry, it is difficult to disperse the powder, causing it to clump together and affecting its uniformity. Even if stirring can disperse the graphene powder, it requires a significant amount of time and effort, making the process cumbersome and time-consuming. Summary of the Invention

[0004] The present invention aims to provide a graphene battery slurry dispersion device and method to solve the problem that graphene powder added to the slurry is not easy to disperse.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a graphene battery slurry dispersion device, including a grinding unit and a flow unit located below the grinding unit; The polishing unit includes a polishing disc, a drive mechanism for moving the polishing disc, and a graphene block holder, with the graphene block holder and the polishing disc facing each other. The flow unit includes a flow section, the top of which has an opening located at least below the grinding disc.

[0006] The principle and advantages of this solution are as follows: Graphene blocks are graphene blocks formed by bonding graphene powder together. A graphene block holder is used to hold and fix the graphene blocks. The graphene blocks are placed on the holder, with the blocks and grinding discs facing and adhering to each other. A drive mechanism moves the grinding disc, which grinds the graphene blocks on their surface. The resulting graphene powder is then released and falls downwards under gravity.

[0007] The flow unit is used to flow the slurry, and the flow section is used to limit the flow of the slurry. The slurry flows in the flow section. Since the top of the flow section has an opening, which is located at least below the grinding disc, the graphene powder that falls off the grinding disc enters the opening and falls onto the flowing slurry. After falling onto the slurry, the graphene powder flows downstream with the slurry. Because there is a continuous flow of slurry in the flow section, and there is always slurry to catch the falling graphene powder, the slurry containing the graphene powder flows downstream.

[0008] The slurry containing graphene powder flowing downstream is collected, stirred, and then used or used directly.

[0009] The following benefits can be obtained by adopting this solution: The graphene powder in this solution is produced by grinding graphene blocks. The powder is sprinkled downwards onto a flowing slurry, where it mixes with the powder at the opening, resulting in a slurry containing a certain amount of graphene. The slurry containing graphene powder is then collected. Because the slurry is flowing and the graphene powder is continuously sprinkled downwards, it is not added all at once. Instead, it is added gradually in small amounts, ensuring uniform dispersion. The collected slurry can be used directly or after stirring. Even if stirring is required after collection, the graphene powder is already dispersed, making subsequent stirring simple and time-saving. Therefore, this solution solves the problem of poor dispersion of graphene powder in slurry, avoiding the issue of large amounts of graphene powder being poured into all the slurry simultaneously without proper dispersion.

[0010] Preferably, as an improvement, it also includes a push plate and a pushing component for moving the push plate toward the grinding disc.

[0011] Therefore, the pushing component is used to move the pusher plate towards the grinding disc, which in turn moves the graphene block towards the grinding disc. This ensures that the graphene block remains in continuous contact with the grinding surface of the grinding disc during the grinding process, preventing the graphene block from becoming too small to maintain contact with the grinding disc after grinding. In this way, the grinding disc continuously grinds the graphene block, producing graphene powder.

[0012] Preferably, as an improvement, the grinding disc is a disc, and the driving mechanism includes a motor, a drive gear and a driven gear. The drive gear is coaxially fixed on the output shaft of the motor, the driven gear is coaxially fixed with the grinding disc, and the drive gear and the driven gear mesh.

[0013] Thus, the motor drives the drive gear to rotate, the drive gear drives the driven gear to rotate, and the driven gear drives the grinding disc to rotate, thereby realizing the movement of the grinding disc and grinding the graphene block.

[0014] Preferably, as an improvement, the grinding disc is vertically positioned. This vertical positioning prevents the graphene powder from being blocked by the grinding disc, allowing it to fall downwards more easily.

[0015] Preferably, as an improvement, the grinding disc has multiple air vents on the side facing the graphene block holder, the graphene block on the graphene block holder has a semi-circular cross-section, and the graphene block is opposite to the upper half of the grinding disc.

[0016] Therefore, during the rotation of the grinding disc, the upper part of the grinding disc grinds the graphene block. When the grinding disc rotates to the lower part, the lower part of the grinding disc no longer contacts the graphene block. Air is blown out through the air vent, which blows off the powder left on the grinding surface of the grinding disc. This achieves the cleaning of graphene powder on the surface of the grinding disc, preventing the accumulation of graphene powder on the surface of the grinding disc from affecting the roughness of the surface and ensuring the grinding effect of the grinding disc on the graphene block.

[0017] Preferably, as an improvement, the air outlet connects the left and right sides of the grinding disc, and the side of the grinding disc away from the graphene block fixing frame is provided with an air inlet pipe. The end of the air inlet pipe is attached to the lower half of the side of the grinding disc, and the end of the air inlet pipe is slidably connected to the grinding disc.

[0018] Therefore, the air intake pipe blows air into the grinding disc, and the air blown out through the air outlet, thus agitating the graphene powder on the surface of the grinding disc and blowing off any remaining graphene powder. Because the end of the air intake pipe is slidably connected to the grinding disc, the end of the air intake pipe and the grinding disc slide relative to each other during rotation, and the air intake pipe does not affect the rotation of the grinding disc. Simultaneously, during the rotation of the grinding disc, when it reaches the lower half of its rotation, the air outlet on the grinding disc automatically connects with the air intake pipe, allowing air to exit automatically without additional control.

[0019] To achieve the above objectives, the present invention also adopts the following technical solution: a graphene battery slurry dispersion method, wherein graphene blocks are polished, the surface of the graphene blocks is polished to produce graphene powder, and the graphene powder falls downwards. The slurry flows below the graphene block, and the graphene powder produced during grinding falls onto the flowing slurry below. The slurry containing graphene powder was collected using a container and stirred.

[0020] The following benefits can be obtained by adopting this solution: The graphene powder in this solution is produced by grinding graphene blocks. The powder is dispersed downwards onto a flowing slurry, thus incorporating a certain amount of graphene powder into the slurry. The slurry containing graphene powder is then collected. Because the slurry is flowing and the graphene powder is continuously dispersed downwards, the graphene powder is not added all at once. It is gradually added in small amounts to the flowing slurry, which facilitates uniform dispersion of the graphene powder. After collection, the slurry can be used directly or after simple stirring. Even if stirring is required after collection, the graphene powder is already dispersed, minimizing the time and effort required for subsequent stirring. The stirring process is simple and time-saving. Therefore, this solution solves the problem of poor dispersion of graphene powder in slurry, avoiding the issue of large amounts of graphene powder being poured into all the slurry simultaneously without proper dispersion.

[0021] Preferably, as an improvement, the graphene blocks are polished using a graphene battery slurry dispersion device.

[0022] Preferably, as an improvement, the flow section is inclined, with a first container connected to the high end of the flow section and a second container connected to the bottom end of the flow section. The first container is used to hold the slurry, which is discharged from the first container and enters the flow section. Due to the inclined arrangement of the flow section, the slurry flows automatically within the flow section. After the graphene powder is sprinkled onto the slurry, the slurry containing the graphene powder flows towards the second container for collection.

[0023] Preferably, as an improvement, the flow rate of the slurry is 5-20 cm / s. Attached Figure Description

[0024] Figure 1 This is a front view schematic diagram of a graphene battery slurry dispersion device.

[0025] Figure 2 A three-dimensional schematic diagram of the graphene block fixing unit for grinding.

[0026] Figure 3 for Figure 2 A three-dimensional diagram from another perspective.

[0027] Figure 4 This is a schematic diagram of the polished surface. Detailed Implementation

[0028] The following detailed description illustrates the specific implementation method: The reference numerals in the accompanying drawings include: motor 1, driving gear 2, driven gear 3, bearing 4, air inlet pipe 5, grinding disc 6, graphene block holder 7, graphene block 8, push plate 9, cylinder 10, baffle 11, grinding surface 12, first container 13, flow part 14, second container 15, opening 16, grinding protrusion 17, air outlet 18, through hole 19, and circular groove 20.

[0029] The basic implementation examples are as follows: Figures 1-4 As shown: Graphene battery slurry dispersion equipment, including a frame (not shown in the figure), a grinding unit, and a flow unit located below the grinding unit.

[0030] The grinding unit includes a grinding disc 6, a drive mechanism for moving the grinding disc 6, and a graphene block holder 7, which is opposite to the grinding disc 6. In this embodiment, the graphene block holder 7 is fixed to the frame by bolts or welding. The graphene block holder 7 is arranged laterally, and a transverse through hole 19 is provided in the middle of the graphene block holder 7. The cross-section of the through hole 19 is semi-circular, so that a graphene block 8 with a semi-circular cross-section can be placed. A push plate 9 and a pushing component for pushing the push plate 9 to move towards the grinding disc 6 are slidably connected laterally within the through hole 19 of the graphene block holder 7. Figure 1 The push plate 9 can enter the through hole 19. The pushing component can be a cylinder 10, connected to the piston rod and push plate 9, so that the cylinder 10 pushes the push plate 9 to move, and the push plate 9 pushes the graphene block 8 inserted into the through hole 19. Alternatively, the pushing component can be a compression spring and a fixing block. The fixing block is located on the right side of the push plate 9 and is fixed to the frame. The compression spring connects the push plate 9 and the fixing block, compressing the push plate 9 and thus pushing it to move to the left. Of course, in other embodiments, the pushing component can be other structures, such as a hydraulic cylinder, a gear and rack drive structure, etc. Any structure capable of pushing the push plate 9 to move laterally to the left is acceptable. The method of pushing the push plate 9 to move is easy to implement, and will not be described in detail in this embodiment.

[0031] In this embodiment, the grinding disc 6 is cylindrical, with its right grinding surface 12 vertically positioned. The grinding disc 6 is rotatably connected to the frame via a bearing 4. The drive mechanism includes a motor 1, a driving gear 2, and a driven gear 3. The driving gear 2 is coaxially fixed to the output shaft of the motor 1 via a key. The driven gear 3 is coaxially fixed to the grinding disc 6 (e.g., via a key), and the driving gear 2 and driven gear 3 mesh. Thus, when the driving gear 2 of the motor 1 rotates, it drives the driven gear 3 to rotate, which in turn drives the grinding disc 6 to rotate. In this embodiment, the grinding disc 6 is located to the left of the graphene block holder 7, with its right side being the grinding surface 12, allowing for the grinding of the left end of the graphene block 8 (extending from the left end of the graphene block holder 7). Figure 4As shown, the grinding surface 12 of the grinding disc 6 is provided with a number of densely packed grinding protrusions 17, which can grind the graphene block 8.

[0032] In this embodiment, the graphene block 8 is positioned opposite the upper half of the grinding disc 6. This ensures that only the upper half of the grinding disc 6 grinds the graphene block 8.

[0033] Combination Figure 3 As shown, the left side of the grinding disc 6 has a circular groove 20. An air inlet pipe 5 is fixedly connected to the frame. The air inlet pipe 5 is semi-circular in shape, and its diameter is equal to the diameter of the circular groove 20. The right end of the air inlet pipe 5 is inserted into the circular groove 20 and fits against the lower half of the right end of the grinding disc 6 (the right end of the circular groove 20 fits against it). The right end of the air inlet pipe 5 and the right end of the grinding disc 6 are slidably connected (the right end of the air inlet pipe 5 and the right end face of the circular groove 20 are clearance-fitted, and the clearance can be 0.1-1mm). The pipe hole of the air inlet pipe 6 is semi-circular. The frame is equipped with an inflation device for inflating the air inlet pipe 5, such as an air pump. Figure 4 As shown, the right end of the grinding disc 6 has multiple densely packed air vents 18, which are connected to the right end of the grinding disc 6. Figure 2 The left end of the upper air vent is connected to the inside of the circular groove 20, and the right end of the air vent is connected to the outer side of the right side of the grinding disc 6. The air vent 18 is located between the gaps of the grinding protrusions 17.

[0034] The flow unit includes a flow section 14, which in this embodiment is a flow channel or a flow tube. The top of the flow section 14 has an opening 16, located at least below the grinding disc 6. The flow section 14 is vertically inclined, with its left end being a high end connected to a first container 13. The bottom of the first container 13 is connected to the high end of the flow section 14, and the first container 13 has a valve for controlling whether slurry flows into the flow section 14. The bottom end of the flow section 14 is connected to a second container 15.

[0035] This embodiment discloses a method for dispersing graphene battery slurry, as detailed below: Graphene block 8 (prepared by mixing graphene powder, binder, and water, then pouring the mixture into a mold (a semi-circular cylindrical structure) for molding; the graphene powder accumulates in the mold, and then it is dried (e.g., by self-heating). After drying into a block, the mold is removed. Because graphene block 8 is formed by the natural accumulation of graphene powder in the mold without compression during the molding process, the bonding strength between the graphene powder particles in the formed graphene block 8 is low, facilitating subsequent grinding to form stone. The graphene block 8 (which falls off) is placed into the through hole 19 of the graphene block holder 7. The right end of the graphene block 8 abuts against the push plate 9, and the left end of the graphene block 8 abuts against the grinding surface 12 of the grinding disc 6. The motor 1 is started, and the motor 1 drives the drive gear 2 to rotate. The drive gear 2 drives the driven gear 3 to rotate, and the driven gear 3 drives the grinding disc 6 to rotate. The upper half (semi-circular) of the grinding disc 6 grinds the semi-circular graphene block 8. The surface of the graphene block 8 is ground to produce graphene powder, which falls downwards.

[0036] Meanwhile, the first container 13 contains a slurry (excluding graphene powder). After the slurry in the first container 13 is stirred, the valve is opened, and the slurry flows into the flow section 14. Because the flow section 14 is inclined, the slurry flows downward along the flow section 14 under the action of gravity; the flow velocity of the slurry is 5-20 cm / s. As the slurry flows to the right, the graphene powder produced by grinding falls into the flow section 14 through the opening 16, and the graphene powder falls onto the slurry flowing below. In this way, as the slurry continues to flow and passes through the opening 16, graphene powder continuously falls onto the slurry, thus gradually spreading the graphene powder onto the slurry flowing to the right. After falling onto the slurry, the graphene powder moves to the right with the slurry and enters the second container 15.

[0037] The slurry containing graphene powder is collected using the second container 15. Since the slurry is in a flowing state during the graphene powder's dispensing process, the graphene powder is dispersed within it, making the slurry in the second container 15 usable. Alternatively, the slurry in the second container 15 can be stirred using a stirring rod to ensure a more uniform mixture of slurry and graphene powder. Even if the slurry in the second container 15 needs stirring, since the graphene powder is already dispersed during the dispensing process, prolonged stirring is unnecessary; simple stirring suffices, making the operation simple and convenient.

[0038] Furthermore, during the grinding process of the graphene block 8, the graphene powder that is ground off by the grinding disc 6 may adhere to the grinding surface 12 of the grinding disc 6. This can fill the gaps between the grinding protrusions 17 on the grinding surface 12, reducing the roughness of the grinding surface 12 and lowering the grinding quality. Therefore, in this embodiment, during rotation, the grinding disc 6 rotates to the air inlet pipe 5 in its lower half. Figure 2 Gas is blown out from the right end of the central air intake pipe 5, and the gas exits through the air outlet 18, thereby blowing off the graphene powder on the grinding surface 12, thus cleaning the graphene powder on the grinding surface 12. After the grinding surface 12 is cleaned, it rotates with the grinding disc 6 to the graphene block 8 to continue grinding the graphene block 8. Figure 2 As shown, a baffle 11 is welded to the bottom of the graphene block holder. The baffle 11 can block the blown graphene powder, preventing the powder from drifting to the right. The blocked graphene powder falls downward into the opening 16. The distance between the baffle 11 and the polishing surface 12 is less than the opening degree of the opening 16.

[0039] In addition, during implementation, a receiving hopper can be connected above the opening to receive the scattered graphene powder. The graphene powder falls down into the opening along the hopper, making the entry of the graphene powder into the opening more precise.

[0040] Of course, in other embodiments, the grinding surface can also be fixed with sandpaper to grind the graphene block 8.

[0041] The above descriptions are merely embodiments of the present invention, and common knowledge such as specific technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solutions of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A graphene battery slurry dispersion device, characterized in that: Includes a polishing unit and a flow unit located below the polishing unit; The polishing unit includes a polishing disc, a driving mechanism for moving the polishing disc, and a graphene block fixing frame, wherein the graphene block fixing frame and the polishing disc are opposite to each other. The flow unit includes a flow section, the top of which has an opening located at least below the grinding disc.

2. The graphene battery slurry dispersion equipment according to claim 1, characterized in that: It also includes a push plate and a pushing component for moving the push plate toward the grinding disc.

3. The graphene battery slurry dispersion equipment according to claim 1, characterized in that: The grinding disc is a disc, and the driving mechanism includes a motor, a drive gear and a driven gear. The drive gear is coaxially fixed on the output shaft of the motor, and the driven gear is coaxially fixed with the grinding disc. The drive gear and the driven gear mesh.

4. The graphene battery slurry dispersion equipment according to claim 3, characterized in that: The grinding disc is set vertically.

5. The graphene battery slurry dispersion equipment according to claim 4, characterized in that: The grinding disc has multiple air vents on its side facing the graphene block holder. The graphene block on the graphene block holder has a semi-circular cross-section and is opposite to the upper half of the grinding disc.

6. The graphene battery slurry dispersion equipment according to claim 5, characterized in that: The air outlet connects to the left and right sides of the grinding disc. An air inlet pipe is provided on the side of the grinding disc away from the graphene block fixing frame. The end of the air inlet pipe is attached to the lower half of the side of the grinding disc, and the end of the air inlet pipe is slidably connected to the grinding disc.

7. A method for dispersing graphene battery slurry, characterized in that: The graphene block is polished, and the surface of the graphene block is polished to produce graphene powder, which falls downwards. The slurry flows below the graphene block, and the graphene powder produced during grinding falls onto the flowing slurry below. The slurry containing graphene powder was collected using a container and stirred.

8. The graphene battery slurry dispersion method according to claim 7, characterized in that: The graphene blocks are polished using the graphene battery slurry dispersion equipment according to any one of claims 1-6.

9. The graphene battery slurry dispersion method according to claim 7, characterized in that: The flow section is inclined, with a first container connected to its high end and a second container connected to its bottom end.

10. The graphene battery slurry dispersion method according to claim 7, characterized in that: The flow rate of the slurry is 5-20 cm / s.

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