Lithium battery graphite negative electrode material coating and granulating device

Abstract

The invention relates to the technical field of coating granulation, and discloses a lithium battery graphite negative electrode material coating granulation device which comprises a high-temperature kettle body, one side of the surface of the high-temperature kettle body is communicated with a discharging port for discharging, one side of the high-temperature kettle body is communicated with a feeding port for feeding, and the other side of the high-temperature kettle body is communicated with a discharging port for discharging. A machine shell is fixed to one side of the surface of the high-temperature kettle body, a motor is fixed to an inner cavity of the machine shell, a rotating rod is fixed to an output shaft of the motor, the first transmission mechanism is arranged on one side of the surface of the rotating rod in a transmission mode, and an extrusion mechanism used for extruding asphalt is arranged on one side of the surface of the first transmission mechanism; when graphite and asphalt are wrapped by the high-temperature kettle body, the asphalt conveyed by the auxiliary material conveying mechanism can be pressurized under the action of the first transmission mechanism and the extrusion mechanism, so that the asphalt is sprayed into the high-temperature kettle body and is mixed and wrapped with the graphite. According to the method, uniform distribution of the coating material can be realized, and the coating rate is improved.

Description

Technical Field

[0001] The invention relates to the technical field of coating and granulation, in particular to a coating and granulation device for graphite negative electrode materials of lithium batteries. Background Art

[0002] In the existing production process of lithium battery graphite negative electrode materials, granulation is a key step in the production of negative electrode materials. The coating granulation process is generally carried out in the kettle body. A resistance wire is installed outside the granulation kettle to transfer heat to the material in the kettle through the wall, so that the material is stirred and mixed below 650°C. The graphene powder and asphalt powder are repeatedly stirred and mixed by the stirring shaft to melt the asphalt powder and coat the outer surface of the graphene particles to obtain a semi-finished negative electrode material. The material is heated and stirred in the granulation kettle for a cycle of 8 to 10 hours. After the reaction time is reached, the material is discharged from the granulation kettle to the cooling kettle, and then the granulation kettle continues to feed a new round of granulation.

[0003] The coating uniformity of graphite negative electrode materials has a crucial influence on their electrochemical performance. If there is non-uniformity in the coating process, it will cause instability in the performance of the material during the charge and discharge cycle, thus having a negative effect on the overall performance of the battery system. At present, in the high-temperature coating process of graphite and asphalt, some equipment adopts the strategy of directly injecting asphalt into a high-temperature reactor, and then relies on stirring to cause the surface of the graphite particles to be coated with asphalt. However, it is difficult to fully activate the reaction activity of asphalt and graphite in a high-temperature environment by stirring alone, resulting in a limited effective contact area between the two, which in turn hinders the optimization of the coating process. Summary of the invention

[0004] The purpose of the present invention is to provide a lithium battery graphite negative electrode material coating granulation device to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a lithium battery graphite negative electrode material coating granulation device, comprising a high-temperature kettle body, the two ends of the high-temperature kettle body are respectively connected with a discharge port and a feed port, and a stirring mechanism is provided in the high-temperature kettle body; The invention is characterized in that the stirring mechanism comprises a transmission rod and a stirring blade, the transmission rod and the stirring blade are both hollow structures, and the hollow structures of the two are connected; The hollow structure of the transmission rod is provided with an auxiliary material conveying mechanism, and the auxiliary material conveying mechanism comprises: A conveying auger is arranged in the hollow structure of the transmission rod; A first transmission mechanism, which is transmission-connected to the conveying auger; An auxiliary material conveying pipe is connected to the hollow structure of the transmission rod; The auxiliary material discharge hole is arranged on the stirring blade and is communicated with the hollow structure of the stirring blade.

[0006] Preferably, the first transmission mechanism comprises: A driving gear, fixedly sleeved on the surface of the rotating rod; A driven gear connected to the driving gear; A first timing wheel, drivingly connected to the driven gear via a rotating shaft; A second timing wheel, connected to the first timing wheel via a timing belt transmission; The second rotating shaft is coaxial with the rotating rod and is disposed in the hollow structure of the rotating rod. The second timing wheel is fixedly sleeved on the surface of the second rotating shaft. The second rotating shaft is a hollow circular column structure. The auxiliary material conveying pipe is connected to the interior of the second rotating shaft. A rotating platform is arranged at one end of the second rotating shaft close to the conveying auger; A plurality of connecting rods are evenly arranged at positions close to the circumference of the rotating table to connect the rotating table with the conveying auger.

[0007] Preferably, the auxiliary material conveying mechanism further comprises a crushing bin, and a crushing mechanism is provided in the crushing bin; The pulverizing mechanism comprises two pulverizing rollers which are connected by gear meshing transmission, and the pulverizing rollers are connected by transmission with the first timing wheel through a transmission shaft.

[0008] Preferably, the auxiliary material conveying mechanism further includes a vibration component, and the vibration component includes: A rotating disc is fixedly sleeved on the surface of the transmission shaft between the crushing roller and the first timing wheel; A plurality of protrusions are evenly arranged on the outer circumferential wall of the rotating disk; A force bearing block, one end of which is contactably connected to the protrusion; A first piston plate connected to the other end of the force bearing block; a first piston tube, slidably connected to the surface of the first piston plate; A first spring, disposed in the inner cavity of the first piston tube, connected to the bottom wall of the first piston tube and the first piston plate; a second piston tube, connected to the first piston tube through a fourth connecting air pipe; A second piston plate is slidably disposed with the inner cavity of the second piston tube; a vibrating head connected to the second piston plate; A second spring is arranged in the inner cavity of the second piston tube and sleeved on the connecting column between the second piston plate and the vibration head; The material guide plate is hinged to the crushing bin, and the lower side of the guide plate is in contact with the vibration head.

[0009] Preferably, the high-temperature kettle body is connected to a gas outlet mechanism, and the gas outlet mechanism comprises: The gas outlet plate is arranged inside the high temperature kettle body; An air outlet hole is provided on the air outlet plate; A first connecting air pipe is connected to the air outlet plate; The air delivery component is connected to the first connecting air pipe to input air into the high-temperature kettle body.

[0010] Preferably, the gas delivery assembly comprises: A flexible water pipe is connected to the first connecting air pipe, and a limiting pipe is provided on one side of the surface of the flexible water pipe; An extrusion wheel rotatably disposed on one side of the flexible water pipe; The extrusion block is arranged on the outer circumference of the extrusion wheel. When the extrusion wheel rotates, the flexible water pipe is intermittently squeezed, so that the first connecting air pipe intermittently passes air into the high-temperature kettle body.

[0011] Preferably, the gas delivery assembly further comprises: A third transmission shaft, drivingly connected to the extrusion wheel; The second transmission shaft is transmission-connected to the third transmission shaft via a bevel gear set; The first transmission shaft has two ends connected to the second transmission shaft and the rotating shaft of the first timing wheel through bevel gear sets.

[0012] Preferably, the air delivery assembly is connected to an air heating device, an air inlet end of the air heating device is provided with a filter plate, and an air outlet end of the air heating device is connected to the first connecting air pipe.

[0013] Preferably, there are a plurality of gas outlet plates which are evenly arranged inside the high-temperature kettle body, and second connecting air pipes are connected between adjacent gas outlet plates.

[0014] Preferably, a plurality of limit blocks are provided on both sides of the inner cavity of the crushing bin, and the guide plate is in contact with the surface of the limit blocks when stationary.

[0015] Compared with the prior art, the present invention has the following beneficial effects: (1) When the high-temperature kettle body is wrapping graphite and asphalt, the asphalt delivered by the auxiliary material conveying mechanism can be pressurized through the conveying auger under the action of the first transmission mechanism, so that the asphalt is sprayed into the high-temperature kettle body and mixed with the graphite for coating. This method can achieve uniform distribution of the coating material and improve the coating rate; (2) The auxiliary material conveying mechanism of the present invention is also provided with a crushing mechanism and a vibration component, which can further crush the input asphalt to avoid the presence of large particles in the asphalt that affect the operation of the device; (3) The present invention provides an air outlet mechanism to form air flow in the inner cavity of the high-temperature reactor body, thereby increasing the activity of asphalt and graphite inside the high-temperature reactor body, increasing the effective contact area, and further optimizing the coating process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the lithium battery graphite negative electrode material coating and granulation device of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the lithium battery graphite negative electrode material coating granulation device of the present invention from another side perspective; Figure 3 It is a schematic diagram of the three-dimensional structure of the high-temperature kettle body after being cut open in the present invention; Figure 4 It is a schematic diagram of the partial three-dimensional structure after the high-temperature kettle body is removed in the present invention; Figure 5 It is a partial and partially cutaway three-dimensional structural schematic diagram of the auxiliary material conveying mechanism in the present invention; Figure 6 Another partial and partially cutaway three-dimensional structural schematic diagram of the auxiliary material conveying mechanism of the present invention; Figure 7 It is a partial and partially cutaway three-dimensional structural schematic diagram of the pulverizing mechanism in the present invention; Figure 8 For the present invention Figure 7 Schematic diagram of the enlarged local three-dimensional structure at B in the middle; Fig. 9 It is a schematic diagram of the partial three-dimensional structure of the vibration component in the present invention.

[0017] Fig.10 It is a schematic diagram of a partial three-dimensional structure from another perspective after removing the high-temperature kettle body in the present invention; Fig.11 It is a partial three-dimensional structural schematic diagram of the air outlet mechanism in the figure of the present invention; Fig.12 It is a schematic diagram of the partial three-dimensional structure of the gas delivery component in the figure of the present invention.

[0018] In the figure: 1-High temperature kettle body; 2-Discharge port; 3-feeding port; 4- housing; 5- Motor; 6-stirring mechanism; 61-transmission rod; 62-stirring blade; 7- auxiliary material conveying mechanism; 71- conveying auger; 72-first transmission mechanism; 721-driving gear; 722-driven gear; 723-first timing wheel; 724-second timing wheel; 725-second rotating shaft; 726-rotating table; 727-connecting rod; 728-first rotating shaft; 729-timing belt; 73- auxiliary material conveying pipe; 74- auxiliary material discharge hole; 75- crushing bin; 76-crushing mechanism; 761-crushing roller; 762-crushing transmission rod; 763-first meshing transmission tooth; 764-second meshing transmission tooth; 77-vibration assembly; 771-rotating disk; 772-bump; 773-force block; 774-first piston plate; 775-first piston tube; 776-first spring; 777-second piston tube; 778-second piston plate; 779-vibration head; 7710-material guide plate; 7711-second spring; 8-air outlet mechanism; 81-air outlet plate; 82-air outlet hole; 83-first connecting air pipe; 84-gas delivery assembly; 841-flexible water pipe; 842-extrusion wheel; 843-extrusion block; 844-third transmission shaft; 845-second transmission shaft; 846-first transmission shaft; 847-limiting pipe; 85- second connecting air pipe; 9- Air heating device; 10- Filter plate. DETAILED DESCRIPTION

[0019] 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.

[0020] See also Figure 1-5As shown, the coating granulation device for graphite negative electrode materials of lithium batteries includes a high-temperature kettle body 1, one side of the surface of the high-temperature kettle body 1 is connected to a discharge port 2 for discharging materials, one side of the high-temperature kettle body 1 is connected to a feed port 3 for feeding materials, and a stirring mechanism 6 is arranged inside the high-temperature kettle body 1. The stirring mechanism includes a transmission rod 61 and a stirring blade 62, and the transmission rod 61 and the stirring blade 62 are both hollow structures, and the hollow structures of the two are connected. A housing 4 is fixed on one side of the surface of the high-temperature kettle body 1, and a motor 5 is fixed to the inner cavity of the housing 4, and the output shaft of the motor 5 is drivingly connected to the rotating rod 61. An auxiliary material conveying mechanism 7 is arranged in the hollow structure of the transmission rod 61, and the auxiliary material conveying mechanism 7 includes a conveying auger 71, a first transmission mechanism 72, an auxiliary material conveying pipe 73 and an auxiliary material discharge hole 74. Among them: the conveying auger 71 is arranged in the hollow structure of the transmission rod 61; the first transmission mechanism 72 is transmission-connected to the conveying auger 71; the auxiliary material conveying pipe 73 is connected to the hollow structure of the transmission rod 61; the auxiliary material discharge hole 74 is arranged on the stirring blade 62 and is connected to the hollow structure of the stirring blade 62.

[0021] Specifically, Figure 5 , Figure 6 As shown, the first transmission mechanism 72 includes a driving gear 721 fixed to the surface of the rotating rod 61, the surface of the driving gear 721 is meshed with a driven gear 722, the inner cavity of the driven gear 722 is fixed with a first rotating shaft 728, the surface of the first rotating shaft 728 is fixed with a first timing wheel 723, the surface of the first timing wheel 723 is meshed with a timing belt 729, the other end of the timing belt 729 is meshed with a second timing wheel 724, the second timing wheel 724 is fixedly sleeved on the surface of the second rotating shaft 725, the second rotating shaft 725 is a hollow annular column structure, the auxiliary material conveying pipe 73 is connected to the inside of the second rotating shaft 725, and a rotating table 726 is provided at one end of the second rotating shaft 725 close to the conveying auger 71, and a plurality of connecting rods 727 are evenly arranged near the circumference of the rotating table 726, and the connecting rods 727 connect the rotating table 726 with the conveying auger 71.

[0022] In this embodiment, by setting the driving gear 721, the driven gear 722, the first rotating shaft 728, the first timing wheel 723, the timing belt 729 and the second timing wheel 724, when the rotating rod 61 rotates, the driving gear 721 fixed to the surface of the rotating rod 61 can mesh with the driven gear 722, and then under the action of the driven gear 722, the first rotating shaft 728 drives the first timing wheel 723 to rotate, and the timing belt 729 meshed with the surface of the first timing wheel 723 is engaged. The gauge belt 729 can drive the second gauge wheel 724 to rotate. When the second gauge wheel 724 rotates, it drives the second rotating shaft 725 to rotate in the hollow structure of the rotating rod 61. The second rotating shaft 725 drives the conveying auger 71 to rotate through the rotating table 726 and the connecting rod 727 to pressurize and convey the asphalt auxiliary material, so that it is sprayed into the high-temperature kettle body 1 from the auxiliary material discharge hole 74, so that the asphalt and graphite are mixed and coated. This method can achieve uniform distribution of the coating material and improve the coating rate.

[0023] like Figure 6-Figure 8 As shown, the auxiliary material conveying mechanism 7 also includes a crushing bin 75, in which a crushing mechanism 76 is arranged; the crushing mechanism 76 includes two crushing rollers 761 connected by gear meshing transmission, and the crushing roller 761 is connected to the first timing wheel 723 by transmission shaft. Specifically, the crushing mechanism 76 includes a crushing transmission rod 762 fixed to one end of the first rotating shaft 728 and a guide plate 7710 arranged on both sides of the inner cavity of the crushing bin 75, the crushing transmission rod 762 is connected to the first meshing transmission tooth 763, the crushing transmission rod 762 is connected to the crushing roller 761, the surface of the first meshing transmission tooth 763 is meshed with the second meshing transmission tooth 764, and the second meshing transmission tooth 764 is also connected to the crushing transmission rod 762 and the crushing roller 761, and a plurality of limit blocks 11 are arranged on both sides of the inner cavity of the crushing bin 75, and the guide plate 7710 is attached to the surface of the limit block 11 when stationary.

[0024] In this embodiment, through the arrangement of the first meshing transmission tooth 761, the crushing transmission rod 762, the crushing roller 761, the guide plate 7710 and the second meshing transmission tooth 764, when the first rotating shaft 728 rotates, the crushing transmission rod 762 fixed on the surface of the first rotating shaft 728 can make the crushing roller 761 rotate, and under the action of the second meshing transmission tooth 764, the crushing transmission rod 762 and the crushing roller 761 on the other side are rotated. Under the action of the crushing rollers 761 on both sides, the input asphalt can be subjected to secondary crushing treatment to avoid the presence of large particle blocks in the asphalt and affect the operation of the device.

[0025] In order to prevent asphalt from being retained on the surface of the guide plate 7710, Fig. 9As shown, the auxiliary material conveying mechanism 7 also includes a vibration component 77, which includes a rotating disk 771 fixed to the surface of the pulverizing transmission rod 762, a plurality of protrusions 772 are fixed to the surface of the rotating disk 771, and a force block 773 is meshed on the surface of the protrusion 772. A first piston plate 774 is fixed to one side of the surface of the force block 773, and a first piston tube 775 is slidably provided on the surface of the first piston plate 774. A first spring 776 is fixed to the inner cavity of the first piston tube 775, and the other end of the first spring 776 is fixed to the surface of the first piston plate 774.

[0026] The vibration assembly 77 also includes a fourth connecting air pipe 7712 connected to the surface of the first piston tube 775, the other end of the fourth connecting air pipe 7712 is connected to the second piston tube 777, the inner cavity of the second piston tube 777 is slidably provided with a second piston plate 778, a vibration head 779 is fixed to one side of the surface of the second piston plate 778, the inner cavity of the second piston tube 777 is fixed with a second spring 7711, the other end of the second spring 7711 is fixed to the surface of the second piston plate 778, the guide plate 7710 is hinged to the inner wall of the crushing bin 75, and the lower side is in contact with the vibration head 779.

[0027] In this embodiment, through the arrangement of the rotating disk 771, the protrusion 772, the force block 773, the first piston tube 775, the first piston plate 774 and the first spring 776, when the pulverizing transmission rod 762 rotates, the rotating disk 771 fixed to the surface of the pulverizing transmission rod 762 can drive the protrusion 772 to rotate, so that the protrusion 772 can squeeze the force block 773. Under the action of the force block 773, the first piston plate 774 can slide in the inner cavity of the first piston tube 775, thereby causing the pressure in the inner cavity of the first piston tube 775 to change. Through the arrangement of the fourth connecting air pipe 7712, the second piston tube 775, the second piston plate 778, the second spring 7711 and the vibration head 779, when the pressure in the inner cavity of the first piston tube 775 changes, under the action of the fourth connecting air pipe 7712, the pressure in the inner cavity of the second piston tube 775 also changes, so that the second piston plate 778 drives the vibration head 779 to work, and under the action of the vibration head 779, the material guide plate 7710 can be knocked, so that the material guide plate 7710 vibrates, thereby preventing asphalt from being retained on the surface of the material guide plate 7710.

[0028] Further, such as Figure 1 , Figure 10-12As shown in the figure, the high temperature kettle body 1 is connected with an air outlet mechanism 8, and the air outlet mechanism 8 includes an internal air outlet plate 81 arranged on the high temperature kettle body 1, and an air outlet hole 82 is arranged on the air outlet plate 81, and the air outlet plate 81 is connected with a first connecting air pipe 83, and the first connecting air pipe 83 is connected with an air delivery component 84 for inputting air into the high temperature kettle body 1. Specifically, the air delivery component 84 includes a flexible water pipe 841 connected to the first connecting air pipe 83, and a limit pipe 847 is arranged on one side of the surface of the flexible water pipe 841, and an extrusion wheel 842 is rotatably arranged on one side of the flexible water pipe 841, and an extrusion block 843 is arranged on the outer circumference of the extrusion wheel 842. When the extrusion wheel 842 rotates, the flexible water pipe 841 is intermittently squeezed, so that the first connecting air pipe 83 intermittently passes air into the high temperature kettle body 1.

[0029] Furthermore, the air delivery assembly 84 also includes a third transmission shaft 844 transmission connected to the extrusion wheel 842, a second transmission shaft 845 transmission connected to the third transmission shaft 844 through a bevel gear set, and a first transmission shaft 846 transmission connected to the second transmission shaft 845 and the rotating shaft of the first timing wheel 723 through a bevel gear set at both ends, and the extrusion wheel 842 is transmission connected to the third transmission shaft 844.

[0030] In this embodiment, by setting the first transmission shaft 846, the second transmission shaft 845, the third transmission shaft 844, the extrusion wheel 842, the extrusion block 843, the first connecting air pipe 83, the flexible water pipe 841 and the limiting pipe 847; when the first rotating shaft 728 rotates, the first transmission shaft 846 transmitted on the surface of the first rotating shaft 728 can drive the second transmission shaft 845 and the third transmission shaft 844 to rotate, and then under the action of the extrusion wheel 842 and the extrusion block 843, the flexible water pipe 841 can be squeezed, and under the continuous squeezing action of the extrusion block 843, air flow is generated in the air outlet plate 81 and the air outlet hole 82, and then the material body in the inner cavity of the high-temperature kettle body 1 is blown, so that air flow is formed in the inner cavity of the high-temperature kettle body 1, so that asphalt and graphite flow, thereby improving the activity of asphalt and graphite inside the high-temperature kettle body 1, increasing the effective contact area, further optimizing the coating process, and improving the encapsulation of asphalt on graphite.

[0031] There may be a plurality of gas outlet plates 81 which are evenly arranged inside the high-temperature reactor body 1 , and adjacent gas outlet plates 81 are connected via second connecting gas pipes 85 .

[0032] The air delivery component 84 is connected to the air heating device 9 to prevent the asphalt from cooling and solidifying and blocking the first connecting air pipe 83 and the air outlet 82. The air inlet end of the air heating device 9 is provided with a filter plate 10 for filtering the incoming air. The air outlet end of the air heating device 9 is connected to the first connecting air pipe 83.

[0033] The working principle of the lithium battery graphite negative electrode material coating granulation device of the present application is: when graphite is used as the negative electrode material, in order to make up for the defects of the material itself, it is necessary to wrap asphalt on the graphite surface. When the device is used, the material can be transported through the discharge port 2 and the feed port 3. The high temperature of the high-temperature kettle body 1 itself can make the asphalt wrapped on the graphite surface. Under the action of the crushing bin 75, the auxiliary material conveying pipe 73, the conveying auger 71 and the auxiliary material discharge hole 74, the asphalt can be transported.

[0034] Under the action of the motor 5, the rotating rod 61 can be rotated, and when the rotating rod 61 rotates, the asphalt and graphite are stirred, so that the asphalt is wrapped around the graphite surface. In addition, when the rotating rod 61 rotates, the driving gear 721 fixed on the surface of the rotating rod 61 can engage with the driven gear 722, so that the first rotating shaft 728 fixed in the inner cavity of the driven gear 722 can make the first timing wheel 723, the timing belt 729 and the second timing wheel 724 work.

[0035] The second rotating shaft 725 fixed to the inner cavity of the second timing wheel 724 can rotate the conveying auger 71 through the connecting rod 727, thereby pressurizing the asphalt delivered by the auxiliary material conveying mechanism 7, so that the asphalt is sprayed out from the auxiliary material discharge hole 74, thereby increasing the intensity of the asphalt spraying, and further making the asphalt act on the inner cavity of the high-temperature kettle body 1 in the form of fine particles, thereby improving the ability of the asphalt to wrap the graphite.

[0036] In addition, when the first rotating shaft 728 rotates, the first transmission shaft 846 transmitted to the surface of the first rotating shaft 728 can make the second transmission shaft 845 and the third transmission shaft 844 rotate, and the extrusion block 843 on the extrusion wheel 842 fixed on the surface of the third transmission shaft 844 can squeeze the first connecting air pipe 83, so that the pressure in the inner cavity of the first connecting air pipe 83 changes, and then under the action of the second connecting air pipe 85 and the air outlet plate 813, the gas heated by the air heating device 9 flows out from the air outlet 82, thereby improving the flow ability of asphalt and graphite in the inner cavity of the high-temperature kettle body 1, and further improving the wrapping ability of asphalt on graphite.

[0037] In addition, when the first rotating shaft 728 rotates, the crushing transmission rod 762 fixed on the surface of the first rotating shaft 728 can drive the crushing roller 761 to rotate, and under the action of the second meshing transmission teeth 764, the crushing rollers 761 on both sides perform secondary crushing on the asphalt to avoid incomplete crushing of the asphalt, which affects the asphalt's ability to wrap graphite.

[0038] When the crushing transmission rods 762 on both sides are working, the rotating disk 771 fixed on the surface of the crushing transmission rod 762 can make the force block 773 work through the protrusion 772. Under the action of the force block 773, the first piston plate 774 slides in the inner cavity of the first piston tube 775, thereby making the vibration component 77 work. Under the action of the vibration head 779, the guide plate 7710 can be knocked to make the guide plate 7710 vibrate, thereby preventing asphalt from remaining on the surface of the guide plate 7710.

[0039] After the asphalt has finished wrapping the graphite, the material can be transported to the next step through the discharge port 2.

[0040] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lithium battery graphite negative electrode material coating and granulation device, comprising a high-temperature kettle body (1), wherein two ends of the high-temperature kettle body (1) are respectively connected to a discharge port (2) and a feed port (3), and a stirring mechanism (6) is provided inside the high-temperature kettle body (1); Features The stirring mechanism (6) comprises a transmission rod (61) and a stirring blade (62), wherein the transmission rod (61) and the stirring blade (62) are both hollow structures, and the hollow structures of the two are connected; An auxiliary material conveying mechanism (7) is arranged in the hollow structure of the transmission rod (61), and the auxiliary material conveying mechanism (7) comprises: A conveying auger (71) is disposed in the hollow structure of the transmission rod (61); A first transmission mechanism (72) is transmission-connected to the conveying auger (71); An auxiliary material conveying pipe (73) is communicated with the hollow structure of the transmission rod (61); The auxiliary material discharge hole (74) is provided on the stirring blade (62) and is communicated with the hollow structure of the stirring blade (62).

2. The lithium battery graphite negative electrode material coating and granulation device according to claim 1, characterized in that: The first transmission mechanism (72) comprises: A driving gear (721) is fixedly sleeved on the surface of the rotating rod (61); A driven gear (722) connected to the driving gear (721); A first timing wheel (723) is transmission-connected to the driven gear (722) via a rotating shaft; A second timing wheel (724) is connected to the first timing wheel (723) via a timing belt transmission; The second rotating shaft (725) is coaxial with the rotating rod (61) and is disposed in the hollow structure of the rotating rod (61); the second timing wheel (724) is fixedly sleeved on the surface of the second rotating shaft (725); the second rotating shaft (725) is a hollow circular column structure; the auxiliary material conveying pipe (73) is connected to the interior of the second rotating shaft (725); A rotating platform (726) is disposed at one end of the second rotating shaft (725) close to the conveying auger (71); A plurality of connecting rods (727) are evenly arranged at positions close to the circumference of the rotating platform (726) to drively connect the rotating platform (726) and the conveying auger (71).

3. The lithium battery graphite negative electrode material coating and granulation device according to claim 2, characterized in that: The auxiliary material conveying mechanism (7) further comprises a crushing bin (75), wherein a crushing mechanism (76) is provided in the crushing bin (75); The pulverizing mechanism (76) comprises two pulverizing rollers (761) connected by gear meshing transmission, and the pulverizing rollers (761) are connected by transmission to the first timing wheel (723) via a transmission shaft.

4. The lithium battery graphite negative electrode material coating and granulation device according to claim 3, characterized in that: The auxiliary material conveying mechanism (7) further comprises a vibration component (77), wherein the vibration component (77) comprises: A rotating disk (771) is fixedly sleeved on the surface of the transmission shaft between the crushing roller (761) and the first timing wheel (723); A plurality of protrusions (772) are evenly arranged on the outer circumferential wall of the rotating disk (771); A force bearing block (773), one end of which is contactably connected to the protrusion (772); A first piston plate (774) connected to the other end of the force bearing block (773); A first piston tube (775) slidably connected to the surface of the first piston plate (175); A first spring (776) is disposed in the inner cavity of the first piston tube (174) and is connected to the bottom wall of the first piston tube (174) and the first piston plate (774); The second piston tube (777) is connected to the first piston tube (775) via a fourth connecting air pipe (7712); A second piston plate (778) slidably disposed with the inner cavity of the second piston tube (182); A vibration head (779) connected to the second piston plate (778); A second spring (7711) is disposed in the inner cavity of the second piston tube (777) and sleeved on a connecting column between the second piston plate (778) and the vibration head (779); The material guide plate (7710) is hinged to the crushing bin (75), and the lower side thereof is in contact with the vibration head (779).

5. The battery graphite negative electrode material coating and granulation device according to claim 2, characterized in that: The high-temperature kettle body (1) is connected to a gas outlet mechanism (8), and the gas outlet mechanism (8) comprises: An air outlet plate (81) is arranged inside the high-temperature kettle body (1); An air outlet hole (82) is provided on the air outlet plate (81); A first connecting air pipe (83) connected to the air outlet plate (81); The air supply assembly (84) is connected to the first connecting air pipe (83) to supply air into the high-temperature kettle body (1).

6. The battery graphite negative electrode material coating and granulation device according to claim 5, characterized in that: The gas delivery assembly (84) comprises: A flexible water pipe (841) is connected to the first connecting air pipe (83), and a limiting pipe (847) is provided on one side of the surface of the flexible water pipe (841); An extrusion wheel (842) rotatably disposed on one side of the flexible water pipe (841); The extrusion block (843) is arranged on the outer circumference of the extrusion wheel (842), and when the extrusion wheel (842) rotates, it intermittently squeezes the flexible water pipe (841), so that the first connecting air pipe (83) intermittently passes air into the high-temperature kettle body (1).

7. The battery graphite negative electrode material coating and granulation device according to claim 6, characterized in that: The gas delivery assembly (84) further comprises: A third transmission shaft (844) is transmission-connected to the extrusion wheel (842); The second transmission shaft (845) is transmission-connected to the third transmission shaft (844) via a bevel gear set; The first transmission shaft (846) has two ends respectively connected to the second transmission shaft (845) and the rotating shaft of the first timing wheel (723) through bevel gear sets.

8. The battery graphite negative electrode material coating and granulation device according to claim 6, characterized in that: The air delivery assembly (84) is connected to an air heating device (9), an air inlet end of the air heating device (9) is provided with a filter plate (10), and an air outlet end of the air heating device (9) is in communication with a first connecting air pipe (83).

9. The battery graphite negative electrode material coating and granulation device according to claim 5, characterized in that: There are a plurality of gas outlet plates (81) which are evenly arranged inside the high-temperature kettle body (1), and second connecting gas pipes (85) are connected between adjacent gas outlet plates (81).

10. The battery graphite negative electrode material coating and granulation device according to claim 4, characterized in that: A plurality of limit blocks (10) are provided on both sides of the inner cavity of the crushing bin (75), and the guide plate (7710) is in contact with the surface of the limit blocks (10) when at rest.

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