Lithium battery silicon carbon negative electrode material coating device

Abstract

The invention relates to the field of lithium battery raw material processing, in particular to a lithium battery silicon-carbon negative electrode material coating device. The technical problems that in the mixing process of an existing device, part of material particles can float to the surface layer of the liquid level of a coating raw material, agglomeration is generated when the material particles and the coating raw material are stirred, mixing is not uniform enough, and the coating effect is poor are solved. A lithium battery silicon carbon negative electrode material coating device comprises a heating cylinder, two supports are fixedly connected to the lower portion of the heating cylinder, two electric heating plates are fixedly connected to the bottom of the heating cylinder, a cover plate is fixedly connected to the top of the heating cylinder, and a discharging hopper is fixedly connected to the cover plate. A push plate is driven by a connecting rod to move towards a direction close to a cavity, the push plate pushes material particles on the surface layer of a liquid level into the cavity and extrudes the material particles into a flow guide pipe, the material particles in the flow guide pipe return to the interior of a coating raw material through a one-way valve II, the floating material particles can be pushed into the coating raw material again, the mixing uniformity is improved, and the mixing efficiency is improved. And the coating effect is improved.

Description

Technical Field

[0001] The present invention relates to the field of lithium battery raw material processing, and in particular to a lithium battery silicon-carbon negative electrode material coating device. Background Art

[0002] Lithium batteries are divided into lithium metal batteries and lithium ion batteries. Lithium ion batteries generally use lithium metal oxide as the positive electrode material and graphite as the negative electrode material. However, graphite materials are easy to react with external substances and have poor compatibility with electrolytes. Therefore, graphite is modified during the production of negative electrode materials. Common modification methods include thermal polycondensation, which mixes and coats the negative electrode material broken into small particles with the coating material for modification (commonly asphalt, PAN and PVA, etc.) in a heating device to obtain a negative electrode material with better performance.

[0003] The existing coating device is generally a heated stirring barrel, which can enhance the fluidity and coating properties of the coating material by heating. However, when the existing coating device is mixing, due to the high viscosity of the coating raw material and the density of the material particles is less than the density of the coating raw material, some material particles will gradually float to the surface of the liquid of the coating raw material, resulting in uneven stirring. In addition, some material particles will agglomerate during the stirring process with the coating raw material, resulting in uneven mixing of the material particles and the coating raw material and poor coating effect. Summary of the invention

[0004] In order to overcome the shortcomings of existing devices in which some material particles gradually float to the surface of the liquid of the coating raw material during mixing, and some material particles agglomerate during the stirring process with the coating raw material, resulting in uneven mixing and poor coating effect, the present invention provides a lithium battery silicon-carbon negative electrode material coating device that can push the floating material particles back into the coating raw material and can refine the agglomerated material particles, thereby improving the uniformity of mixing and improving the coating effect.

[0005] The technical solution of the present invention is: a lithium battery silicon-carbon negative electrode material coating device, comprising a heating cylinder, the heating cylinder is hollow, one side of the heating cylinder is opened, the lower part of the heating cylinder is fixedly connected to two brackets, the bottom of the heating cylinder is fixedly connected to two electric heating plates, the two electric heating plates are symmetrically arranged, the top of the heating cylinder is fixedly connected to a cover plate, the cover plate is fixedly connected to a lower hopper, the lower hopper is connected to the space inside the heating cylinder, the top of the lower hopper is clamped with a sealing cover, the upper part of the heating cylinder is fixedly connected to a one-way valve 1, the upper part of the heating cylinder is fixedly connected to a safety valve, the bottom of the heating cylinder is fixedly connected to a discharge valve, the heating cylinder is provided with a stirring mechanism, the stirring mechanism is used to stir material particles and coating raw materials during heating, the heating cylinder is provided with a pushing mechanism, the pushing mechanism is used to push the floating material particles back into the coating raw materials.

[0006] Furthermore, the stirring mechanism includes a motor, wherein the motor is fixedly connected to one of the brackets, a rotating shaft 1 is rotatably connected to the lower portion of the inner wall of the heating tube, one end of the rotating shaft 1 is fixedly connected to the output shaft of the motor, a plurality of stirring blades are fixedly connected to the rotating shaft 1, the plurality of stirring blades are evenly spaced, and the plurality of stirring blades are all located inside the heating tube.

[0007] Furthermore, the pushing mechanism includes a cavity, the cavity is fixedly connected to one side of the heating tube, the cavity is hollow, the bottom of the cavity is gathered, the cavity covers the opening on one side of the heating tube, the bottom of the cavity is fixedly connected to a guide tube, the guide tube is connected to the heating tube through the cavity, a one-way valve 2 is fixedly connected to the bottom of the guide tube, the lower end of the one-way valve 2 is fixedly connected to the lower part of the heating tube, and a telescopic component is provided between the heating tube and the cavity.

[0008] Furthermore, the telescopic assembly includes a hydraulic push rod, which is fixedly connected between the heating tube and the cavity, and one end of the telescopic rod of the hydraulic push rod is fixedly connected to a connecting rod, and the connecting rod is slidably connected to the heating tube, and one end of the connecting rod located in the heating tube is fixedly connected to a push plate, and the push plate is arranged at an angle, and both sides of the push plate are respectively in contact with both sides of the inner wall of the heating tube.

[0009] Furthermore, it also includes a scraper mechanism, which is provided on the hydraulic push rod and is used for intermittently scraping off the coating raw material and material particles adhering to the inner wall of the heating cylinder when the coating raw material liquid level fluctuates up and down. The scraper mechanism includes a connecting frame, one end of the hydraulic push rod telescopic rod is fixedly connected to the connecting frame, the lower part of the connecting frame is fixedly connected to a guide frame, a sliding groove is opened on the guide frame, a limiting frame is fixedly connected to the heating cylinder, a rack is slidably connected in the sliding groove of the guide frame, the rack is slidably connected to the limiting frame, a reset spring is provided between the rack and the sliding groove of the guide frame, and a swing assembly is provided on the heating cylinder.

[0010] Furthermore, the swing assembly includes a second rotating shaft, the second rotating shaft is rotatably connected to the heating cylinder, a first gear is fixedly connected to the second rotating shaft, the rack is meshed with the first gear, a rotating groove frame is fixedly connected to the second rotating shaft, a long limit groove and a short limit groove are provided on the rotating groove frame, two scraper frames are slidably connected to the cover plate, the two scraper frames are staggered, the two scraper frames are respectively in contact with the two sides of the inner wall of the heating cylinder, the upper parts of the two scraper frames are fixedly connected to transmission frames, and the lower parts of the two transmission frames are respectively located in the long limit groove and the short limit groove of the rotating groove frame.

[0011] Furthermore, the ratio of the length of the short limiting groove to the long limiting groove of the rotating groove frame is 1:3.

[0012] Furthermore, it also includes a refining mechanism, the upper end of the one-way valve two is provided with the refining mechanism, the refining mechanism is used to refine the agglomerated material particles, the refining mechanism includes a spiral conveying frame, the upper end of the one-way valve two is rotatably connected to the spiral conveying frame, the lower part of the inner wall of the cavity is fixedly connected to a stabilizing frame, the upper part of the spiral conveying frame is rotatably connected to the stabilizing frame, the upper part of the inner wall of the one-way valve two is fixedly connected to a porous plate, the spiral conveying frame passes through the porous plate, the porous plate is located below the guide tube, the spiral conveying frame, the guide tube and the porous plate are located on the same axis, the one-way valve two is fixedly connected to a mounting frame, the mounting frame is rotatably connected to a rotating shaft three, the rotating shaft three is fixedly connected to a gear two, the bottom of the spiral conveying frame is fixedly connected to a gear three, the gear two is meshed with the gear three, and a transmission assembly is provided between the rotating shaft three and the rotating shaft one.

[0013] Furthermore, the transmission assembly includes a driving wheel, a driven wheel and a transmission belt, one end of the rotating shaft 1 is fixedly connected to the driving wheel, one end of the rotating shaft 3 is fixedly connected to the driven wheel, and a transmission belt is wound between the driving wheel and the driven wheel.

[0014] Furthermore, a scraper frame is also included. The scraper frame is fixedly connected to the rotating shaft, and the scraper frame is located in the heating tube. The scraper frame is in close contact with the lower part of the inner wall of the heating tube.

[0015] The beneficial effects of the present invention are as follows: 1. The horizontal movement of the telescopic rod of the hydraulic push rod drives the horizontal movement of the connecting rod, and the horizontal movement of the connecting rod drives the push plate to move in the direction close to the cavity. The push plate pushes the material particles that float to the surface of the liquid into the cavity and squeezes them into the guide tube. The material particles in the guide tube return to the interior of the coating raw material through the one-way valve 2, and the floating material particles can be pushed back into the coating raw material, thereby improving the uniformity of mixing and improving the coating effect.

[0016] 2. The gear 1 drives the rotating shaft 2 to rotate, the rotating shaft 2 drives the rotating trough frame to rotate, the rotating trough frame drives the two transmission frames to move upward or downward respectively, the two transmission frames drive the two scraper frames to move upward or downward respectively, the two scraper frames scrape two of the surfaces where the coating raw material liquid surface contacts the inner wall of the heating cylinder respectively, and the push plate scrapes the other two surfaces where the coating raw material liquid surface contacts the inner wall of the heating cylinder when moving, so that the coating raw materials and material particles adhering to the inner wall of the heating cylinder when the coating raw material liquid surface fluctuates up and down can be scraped off, thereby further improving the uniformity of mixing and further improving the coating effect.

[0017] 3. The rotation of shaft 1 drives shaft 3 to rotate through the transmission assembly, the rotation of shaft 3 drives gear 2 to rotate, the rotation of gear 2 drives gear 3 to rotate, the rotation of gear 3 drives the spiral conveyor to rotate, the spiral conveyor squeezes the material particles in the cavity and the guide tube downward, and the agglomerated material particles will disperse when moving downward through the porous plate, which can refine the agglomerated material particles, further improve the uniformity of mixing, and further improve the coating effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0019] Figure 2 It is a schematic diagram of the disassembled three-dimensional structure of the heating cylinder, bracket, electric heating plate, cover plate, lower hopper, sealing cover, one-way valve 1, safety valve and discharge valve of the present invention.

[0020] Figure 3 It is a three-dimensional structural schematic diagram of the material pushing mechanism and the material scraping mechanism of the present invention.

[0021] Figure 4 It is a schematic diagram of the disassembled three-dimensional structure of the scraping mechanism of the present invention.

[0022] Figure 5 It is a three-dimensional structural schematic diagram of the material pushing mechanism and the thinning mechanism of the present invention.

[0023] Figure 6 It is a schematic cross-sectional view of the material pushing mechanism, the material scraping mechanism and the thinning mechanism of the present invention.

[0024] Figure 7 It is a schematic diagram of the split three-dimensional structure of the stirring mechanism of the present invention.

[0025] Figure 8 It is a schematic cross-sectional structure diagram of the material pushing mechanism and the thinning mechanism of the present invention.

[0026] Fig. 9 It is a schematic diagram of the split three-dimensional structure of the refinement mechanism of the present invention.

[0027] In the above figures: 1: heating cylinder, 2: bracket, 3: electric heating plate, 4: cover plate, 5: lower hopper, 6: sealing cover, 7: one-way valve 1, 8: safety valve, 9: discharge valve, 101: motor, 102: rotating shaft 1, 103: stirring blade, 111: cavity, 112: guide tube, 113: one-way valve 2, 114: hydraulic push rod, 115: connecting rod, 116: push plate, 121: connecting frame, 122: Guide frame, 123: limit frame, 124: rack, 125: return spring, 126: rotating shaft two, 127: gear one, 128: rotating trough frame, 129: scraper frame, 1210: transmission frame, 131: spiral conveyor frame, 132: stabilizing frame, 133: perforated plate, 134: mounting frame, 135: rotating shaft three, 136: gear two, 137: gear three, 138: transmission assembly, 14: scraper frame. DETAILED DESCRIPTION

[0028] 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.

[0029] Embodiment 1: A lithium battery silicon-carbon negative electrode material coating device, such as Figure 1-Figure 3 and Figure 5-Figure 9 As shown, it includes a heating cylinder 1, which is hollow and has an opening on one side. Two brackets 2 are fixedly connected to the lower part of the heating cylinder 1, and the brackets 2 are used to support the heating cylinder 1. Two electric heating plates 3 are fixedly connected to the bottom of the heating cylinder 1, and the two electric heating plates 3 are symmetrically arranged. The electric heating plates 3 are used to heat the material particles and the coating raw materials in the heating cylinder 1. A cover plate 4 is fixedly connected to the top of the heating cylinder 1, and a lower hopper 5 is fixedly connected to the cover plate 4. The lower hopper 5 is used to add materials into the heating cylinder 1. The lower hopper 5 and the heating cylinder 1 The internal space is connected, a sealing cover 6 is clamped on the top of the lower hopper 5, a one-way valve 7 is fixedly connected to the upper part of the heating cylinder 1, and the one-way valve 7 is used to introduce protective gas into the heating cylinder 1, a safety valve 8 is fixedly connected to the upper part of the heating cylinder 1, and the safety valve 8 is used to stabilize the pressure in the heating cylinder 1, a discharge valve 9 is fixedly connected to the bottom of the heating cylinder 1, a stirring mechanism is provided on the heating cylinder 1, and the stirring mechanism is used to stir the material particles and the coating raw material during heating, and a pushing mechanism is provided on the heating cylinder 1, and the pushing mechanism is used to push the floating material particles back into the coating raw material.

[0030] The stirring mechanism includes a motor 101, wherein the motor 101 is connected to one of the brackets 2 by bolts, a rotating shaft 102 is rotatably connected to the lower portion of the inner wall of the heating tube 1, one end of the rotating shaft 102 is fixedly connected to the output shaft of the motor 101, a plurality of stirring blades 103 are fixedly connected to the rotating shaft 102, the plurality of stirring blades 103 are evenly spaced, and the plurality of stirring blades 103 are located in the heating tube 1, and the motor 101 drives the rotating shaft 102 to rotate, thereby driving the plurality of stirring blades 103 to rotate.

[0031] The pushing mechanism includes a cavity 111, the cavity 111 is welded to one side of the heating tube 1, the cavity 111 is hollow, the bottom of the cavity 111 is gathered, the cavity 111 covers the opening on one side of the heating tube 1, a guide tube 112 is fixedly connected to the bottom of the cavity 111, the guide tube 112 is connected to the heating tube 1 through the cavity 111, a second check valve 113 is fixedly connected to the bottom of the guide tube 112, the lower end of the second check valve 113 is fixedly connected to the lower part of the heating tube 1, the cavity 111 introduces material particles into the second check valve 113 through the guide tube 112, and then re-introduces the material particles into the heating tube 1 through the second check valve 113, and a telescopic component is provided between the heating tube 1 and the cavity 111.

[0032] The telescopic assembly includes a hydraulic push rod 114, and the hydraulic push rod 114 is connected between the heating tube 1 and the cavity 111 by bolts. A connecting rod 115 is fixedly connected to one end of the telescopic rod of the hydraulic push rod 114, and the connecting rod 115 is slidably connected to the heating tube 1. One end of the connecting rod 115 located in the heating tube 1 is fixedly connected to a push plate 116, and the push plate 116 is used to push the floating material particles. The hydraulic push rod 114 drives the connecting rod 115 to move, thereby driving the push plate 116 to move. The push plate 116 is arranged at an angle, and the inclined arrangement is used to prevent the coating material from accumulating in one place when the push plate 116 is reset. The two sides of the push plate 116 are respectively in contact with the two sides of the inner wall of the heating tube 1.

[0033] Initially, the electric heating plate 3, the discharge valve 9 and the motor 101 are in a closed state. The staff opens the sealing cover 6 and pours the material particles and the coating raw materials into the heating cylinder 1 through the lower hopper 5. When the coating raw material liquid level is flush with the opening on one side of the heating cylinder 1, the staff stops adding the material particles and the coating raw materials and covers the sealing cover 6. Then the staff continuously introduces protective gas into the heating cylinder 1 through the one-way valve 7. The one-way valve 7 can prevent the protective gas from flowing back. The safety valve 8 can release the pressure in time when there is too much gas in the heating cylinder 1 and the pressure is too high during the heating process to prevent an explosion. After the heating cylinder 1 is filled with protective gas, the staff starts the electric heating plate 3 and the motor 101. After the electric heating plate 3 is powered on, it heats the heating cylinder 1, and then the inside of the heating cylinder 1 is heated. The material particles and the coating raw materials are heated, the output shaft of the motor 101 rotates to drive the rotating shaft 102 to rotate, the rotating shaft 102 rotates to drive a plurality of stirring blades 103 to rotate, and the rotation of the plurality of stirring blades 103 stirs the material particles and the coating raw materials in the heating process, so that the material particles and the coating raw materials are heated more evenly. During the stirring process, due to the high viscosity of the coating raw materials and the density of the material particles is lower than that of the coating raw materials, some of the material particles will gradually float to the surface of the liquid surface of the coating raw materials, resulting in uneven stirring. After the heating starts, the staff starts the telescopic rod of the hydraulic push rod 114 to retract, and the telescopic rod of the hydraulic push rod 114 moves horizontally to drive the connecting rod 115 to move horizontally, and the connecting rod 115 moves horizontally to drive The push plate 116 moves in the direction close to the cavity 111, and the push plate 116 pushes the material particles floating on the surface of the liquid into the cavity 111 and squeezes them into the guide tube 112. The material particles in the guide tube 112 will return to the inside of the coated raw material through the one-way valve 113. Through the above operation, the floating material particles can be pushed back into the coated raw material to improve the uniformity of mixing and the coating effect. After the push plate 116 contacts the inner wall of one side of the cavity 111, the staff adjusts the extension of the telescopic rod of the hydraulic push rod 114, and the telescopic rod of the hydraulic push rod 114 moves in the reverse direction to drive the connecting rod 115 to move in the reverse direction. The connecting rod 115 moves in the reverse direction to drive the push plate 116 to move in the direction away from the cavity 111, and the push plate 116 moves in the reverse direction. During movement, the scraped material particles and coating raw materials will move upward along the inclined surface of the push plate 116 and then fall down again, preventing the material particles and coating raw materials from moving in the opposite direction and accumulating to one side when the push plate 116 moves in the opposite direction. Then the staff adjusts the hydraulic push rod 114 to reciprocate and extend and contract until the mixing is completed. After the mixing time reaches the requirement, the staff opens the discharge valve 9. Under the action of gravity, the material particles and coating raw materials in the heating cylinder 1 will flow downward. The staff uses a container under the discharge valve 9 to hold the mixed material particles and coating raw materials. After the material particles and coating raw materials in the heating cylinder 1 are exhausted, the staff turns off the electric heating plate 3, the discharge valve 9 and the motor 101, and stops introducing protective gas into the heating cylinder 1 to facilitate the next work.

[0034] Embodiment 2: Based on embodiment 1, Figure 1 and Figure 3-Figure 6 As shown, it also includes a scraping mechanism, which is provided on the hydraulic push rod 114. The scraping mechanism is used to intermittently scrape off the coating raw materials and material particles adhering to the inner wall of the heating cylinder 1 when the coating raw material liquid level fluctuates up and down. The scraping mechanism includes a connecting frame 121, and one end of the telescopic rod of the hydraulic push rod 114 is welded with the connecting frame 121. The lower part of the connecting frame 121 is fixedly connected to a guide frame 122, and a sliding groove is opened on the guide frame 122. The heating cylinder 1 is fixedly connected to a limited The guide frame 122 has a sliding groove in which a rack 124 is slidably connected. The hydraulic push rod 114 drives the guide frame 122 to move through the connecting frame 121, thereby driving the rack 124 to move. The rack 124 is slidably connected to the limiting frame 123. The limiting frame 123 is used to limit the rack 124. A reset spring 125 is provided between the rack 124 and the sliding groove of the guide frame 122. The heating tube 1 is provided with a swing assembly.

[0035] The swing assembly includes a second rotating shaft 126, the second rotating shaft 126 is rotatably connected to the heating cylinder 1, a gear 127 is fixedly connected to the second rotating shaft 126, the rack 124 is meshed with the gear 127, a rotating slot frame 128 is fixedly connected to the second rotating shaft 126, the rack 124 drives the second rotating shaft 126 to rotate through the gear 127, and then drives the rotating slot frame 128 to rotate, a long limit slot and a short limit slot are opened on the rotating slot frame 128, and the cover plate 4 is slidably connected to the cover plate 4. Two scraper frames 129 are connected, and the two scraper frames 129 are staggered. The two scraper frames 129 are in contact with the inner wall of the heating cylinder 1 on both sides respectively. The upper parts of the two scraper frames 129 are fixed with transmission frames 1210, and the lower parts of the two transmission frames 1210 are respectively located in the long limit groove and the short limit groove of the rotating groove frame 128. The rotating groove frame 128 drives the scraper frames 129 to move through the transmission frame 1210, thereby scraping off the coating raw materials and material particles remaining on the upper part of the heating cylinder 1.

[0036] The ratio of the length of the short limiting groove to the length of the long limiting groove of the rotating groove frame 128 is 1:3.

[0037] Initially, one of the scraper racks 129 is located above the liquid surface of the coated raw material, and the other scraper rack 129 is located below the liquid surface of the coated raw material. The lower part of the transmission frame 1210 on the scraper rack 129 located above the liquid surface of the coated raw material is located in the short limit groove of the rotating groove frame 128, and the lower part of the transmission frame 1210 on the scraper rack 129 located below the liquid surface of the coated raw material is located in the long limit groove of the rotating groove frame 128. The reset spring 125 presses against the rack 124, and the rack 124 clamps the gear 127, and then clamps the rotating shaft 126, the rotating groove frame 128, the transmission frame 1210 and the scraper rack 129. During the stirring process, the liquid surface of the coated raw material will fluctuate up and down with the rotation of the stirring blade 103, and then the residual liquid will remain on the upper part of the inner wall of the heating cylinder 1. A part of the coating raw materials and material particles result in uneven mixing, the telescopic rod of the hydraulic push rod 114 contracts and drives the connecting frame 121 to move horizontally, the connecting frame 121 moves horizontally and drives the guide frame 122 to move horizontally, the guide frame 122 moves horizontally and drives the rack 124 and the reset spring 125 to move horizontally, the rack 124 moves horizontally and drives the gear 127 to rotate, the gear 127 rotates and drives the shaft 2 126 to rotate, the shaft 2 126 rotates and drives the rotating groove frame 128 to rotate, the rotating groove frame 128 rotates and drives the two transmission frames 1210 to move upward or downward respectively, the two transmission frames 1210 drive the two scraper frames 129 to move upward or downward respectively, the two scraper frames 129 respectively scrape the coating raw material liquid surface and the inner wall of the heating cylinder 1. When the push plate 116 moves, the other two surfaces where the coating raw material liquid surface contacts the inner wall of the heating cylinder 1 are scraped off. Through the above operation, the coating raw material and material particles adhering to the inner wall of the heating cylinder 1 when the coating raw material liquid surface fluctuates up and down can be scraped off, thereby further improving the uniformity of mixing and the coating effect. After the two scraper racks 129 reach the highest point and the lowest point respectively, the meshing teeth of the rack 124 contact the limiting rack 123, and the limiting rack 123 limits the rack 124. The rack 124 always clamps the gear 127, so that the two scraper racks 129 remain stationary, preventing the scraper racks 129 from blocking the path of the push plate 116 entering the cavity 111, and the connecting frame 121 continues to move horizontally to drive the guide frame 122 to continue When the push plate 116 moves horizontally, the return spring 125 is compressed, and the telescopic rod of the hydraulic push rod 114 moves in the opposite direction, driving the connecting frame 121 to move in the opposite direction. The connecting frame 121 moves in the opposite direction, driving the guide frame 122 to move in the opposite direction. At this time, the return spring 125 will rebound, so that the rack 124 remains stationary. After the push plate 116 leaves the cavity 111, the return spring 125 rebounds to the initial state, and the guide frame 122 continues to move in the opposite direction, driving the return spring 125 and the rack 124 to move in the opposite direction. The rack 124 moves in the opposite direction, driving the gear 127 to rotate in the opposite direction, and the gear 127 rotates in the opposite direction, driving the shaft 2 126 to rotate in the opposite direction, and the shaft 2 126 rotates in the opposite direction, driving the rotating slot frame 128 to rotate in the opposite direction, and the rotating slot frame 128 rotates in the opposite direction, driving the two transmission frames 1210 to reset.The two transmission frames 1210 are reset to drive the two scraper frames 129 to reset.

[0038] Embodiment 3: Based on embodiment 2, Figure 1 , Figure 3 and Figure 5-Figure 9 As shown, it also includes a refinement mechanism, the upper end of the one-way valve 113 is provided with the refinement mechanism, the refinement mechanism is used to refine the agglomerated material particles, the refinement mechanism includes a spiral conveying frame 131, the upper end of the one-way valve 113 is rotatably connected to the spiral conveying frame 131, the lower part of the inner wall of the cavity 111 is welded with a stabilizing frame 132, the upper part of the spiral conveying frame 131 is rotatably connected to the stabilizing frame 132, the upper part of the inner wall of the one-way valve 113 is fixedly connected with a porous plate 133, the porous plate 133 is used to disperse the agglomerated material particles, the spiral conveying frame 131 passes through the porous plate 133, the porous plate 133 is located below the guide pipe 112, the spiral conveying frame 131, ... The flow tube 112 and the porous plate 133 are located on the same axis. A mounting frame 134 is fixedly connected to the one-way valve 113. A rotating shaft 135 is rotatably connected to the mounting frame 134. A gear 2 136 is fixedly connected to the rotating shaft 135. A gear 3 137 is fixedly connected to the bottom of the spiral conveying frame 131. The gear 3 137 drives the spiral conveying frame 131 to rotate, thereby squeezing the agglomerated material particles downward. The gear 2 136 is meshed with the gear 3 137. A transmission assembly 138 is provided between the rotating shaft 3 135 and the rotating shaft 1 102. The rotating shaft 1 102 drives the rotating shaft 3 135 to rotate through the transmission assembly 138, and then drives the gear 3 137 to rotate through the gear 2 136.

[0039] The transmission assembly 138 includes a driving wheel, a driven wheel and a transmission belt. One end of the rotating shaft 102 is fixedly connected to the driving wheel, one end of the rotating shaft 3 135 is fixedly connected to the driven wheel, and a transmission belt is wound between the driving wheel and the driven wheel.

[0040] It also includes a scraper frame 14, which is fixedly connected to the rotating shaft 102. The scraper frame 14 is located in the heating tube 1. The scraper frame 14 is in close contact with the lower part of the inner wall of the heating tube 1. The rotating shaft 102 drives the scraper frame 14 to rotate, thereby continuously scraping the raw material at the lower part of the inner wall of the heating tube 1.

[0041] During the mixing process, due to the high viscosity and low fluidity of the coating raw material, and the small volume of the material particles, some material particles will agglomerate during the mixing process with the coating raw material, resulting in uneven mixing of the material particles and the coating raw material. The agglomerated material particles will be squeezed to the surface of the liquid layer of the coating raw material under the action of buoyancy, and pushed into the cavity 111 by the push plate 116. The rotation of the shaft 102 drives the shaft 3 135 to rotate through the transmission component 138. The rotation of the shaft 3 135 drives the gear 2 136 to rotate. The rotation of the gear 2 136 drives the gear 3 137 to rotate. The rotation of the gear 3 137 drives the spiral conveyor 131 to rotate. The spiral conveyor 131 squeezes the material particles in the cavity 111 and the guide tube 112 downward. The agglomerated material particles will disperse when moving downward through the porous plate 133. Through the above operation, the agglomerated material particles can be refined, the uniformity of mixing can be further improved, and the coating effect can be further improved.

[0042] When the rotating shaft 102 rotates, the scraper frame 14 is driven to rotate. The scraper frame 14 rotates to continuously scrape the bottom of the inner wall of the heating tube 1 to reduce the probability of sticking to the bottom.

[0043] Those skilled in the art should understand that the above embodiments do not limit the present invention in any form, and any technical solutions obtained by equivalent replacement or equivalent transformation shall fall within the protection scope of the present invention.

Claims

1. A lithium battery silicon-carbon negative electrode material coating device, characterized in that: The invention comprises a heating cylinder (1), the heating cylinder (1) being hollow, one side of the heating cylinder (1) being open, the lower part of the heating cylinder (1) being fixedly connected to two brackets (2), the bottom of the heating cylinder (1) being fixedly connected to two electric heating plates (3), the two electric heating plates (3) being symmetrically arranged, the top of the heating cylinder (1) being fixedly connected to a cover plate (4), the cover plate (4) being fixedly connected to a lower hopper (5), the lower hopper (5) being connected to the space inside the heating cylinder (1), the lower hopper (5) being connected to the space inside the heating cylinder (1), and the lower hopper (5) being connected to the space inside the heating cylinder (1). A sealing cover (6) is clamped on the top of the hopper (5), a one-way valve (7) is fixedly connected to the upper part of the heating cylinder (1), a safety valve (8) is fixedly connected to the upper part of the heating cylinder (1), and a discharge valve (9) is fixedly connected to the bottom of the heating cylinder (1). A stirring mechanism is provided on the heating cylinder (1), and the stirring mechanism is used to stir the material particles and the coating raw material during heating. A pushing mechanism is provided on the heating cylinder (1), and the pushing mechanism is used to push the floating material particles back into the coating raw material.

2. A lithium battery silicon-carbon negative electrode material coating device as claimed in claim 1, characterized in that: The stirring mechanism comprises a motor (101), wherein the motor (101) is fixedly connected to one of the brackets (2), a rotating shaft (102) is rotatably connected to the lower part of the inner wall of the heating tube (1), one end of the rotating shaft (102) is fixedly connected to the output shaft of the motor (101), and a plurality of stirring blades (103) are fixedly connected to the rotating shaft (102), the plurality of stirring blades (103) are evenly spaced, and the plurality of stirring blades (103) are all located in the heating tube (1).

3. A lithium battery silicon-carbon negative electrode material coating device as claimed in claim 2, characterized in that: The pushing mechanism comprises a cavity (111), one side of the heating tube (1) is fixedly connected to the cavity (111), the cavity (111) is hollow, the bottom of the cavity (111) is gathered, the cavity (111) covers the opening on one side of the heating tube (1), the bottom of the cavity (111) is fixedly connected to a guide tube (112), the guide tube (112) is connected to the heating tube (1) through the cavity (111), the bottom of the guide tube (112) is fixedly connected to a second one-way valve (113), the lower end of the second one-way valve (113) is fixedly connected to the lower part of the heating tube (1), and a telescopic component is provided between the heating tube (1) and the cavity (111).

4. A lithium battery silicon-carbon negative electrode material coating device as claimed in claim 3, characterized in that: The telescopic assembly comprises a hydraulic push rod (114), the hydraulic push rod (114) being fixedly connected between the heating tube (1) and the cavity (111), a connecting rod (115) being fixedly connected to one end of the telescopic rod of the hydraulic push rod (114), the connecting rod (115) being slidably connected to the heating tube (1), and a push plate (116) being fixedly connected to one end of the connecting rod (115) located inside the heating tube (1), the push plate (116) being arranged in an inclined manner, and two sides of the push plate (116) respectively contact two sides of the inner wall of the heating tube (1).

5. A lithium battery silicon-carbon negative electrode material coating device as claimed in claim 3, characterized in that: The invention also comprises a scraping mechanism, the scraping mechanism being provided on the hydraulic push rod (114), the scraping mechanism being used for intermittently scraping off the coating raw material and material particles adhering to the inner wall of the heating cylinder (1) when the coating raw material liquid level fluctuates up and down, the scraping mechanism comprising a connecting frame (121), one end of the telescopic rod of the hydraulic push rod (114) being fixedly connected to the connecting frame (121), the lower part of the connecting frame (121) being fixedly connected to a guide frame (122), the guide frame (122 being provided with a sliding groove, the limiting frame (123) being fixedly connected to the heating cylinder (1), the sliding groove of the guide frame (122) being slidably connected to a rack (124), the rack (124) being slidably connected to the limiting frame (123), a return spring (125) being provided between the rack (124) and the sliding groove of the guide frame (122), and the heating cylinder (1) being provided with a swinging assembly.

6. A lithium battery silicon-carbon negative electrode material coating device as claimed in claim 5, characterized in that: The swing assembly comprises a second rotating shaft (126), the second rotating shaft (126) is rotatably connected to the heating tube (1), a first gear (127) is fixedly connected to the second rotating shaft (126), the rack (124) is meshed with the first gear (127), a rotating slot frame (128) is fixedly connected to the second rotating shaft (126), a long limit slot and a short limit slot are formed on the rotating slot frame (128), two scraper frames (129) are slidably connected to the cover plate (4), the two scraper frames (129) are staggered, the two scraper frames (129) are respectively in contact with two sides of the inner wall of the heating tube (1), the upper parts of the two scraper frames (129) are fixedly connected to a transmission frame (1210), and the lower parts of the two transmission frames (1210) are respectively located in the long limit slot and the short limit slot of the rotating slot frame (128).

7. A lithium battery silicon-carbon negative electrode material coating device as claimed in claim 6, characterized in that: The ratio of the length of the short limiting groove to the length of the long limiting groove of the rotating groove frame (128) is 1:

3.

8. A lithium battery silicon-carbon negative electrode material coating device as claimed in claim 5, characterized in that: The invention also comprises a refinement mechanism, wherein the refinement mechanism is provided at the upper end of the second one-way valve (113), and the refinement mechanism is used to refine the agglomerated material particles, and the refinement mechanism comprises a spiral conveying frame (131), and the upper end of the second one-way valve (113) is rotatably connected to the spiral conveying frame (131), and the lower part of the inner wall of the cavity (111) is fixedly connected to a stabilizing frame (132), and the upper part of the spiral conveying frame (131) is rotatably connected to the stabilizing frame (132), and the upper part of the inner wall of the second one-way valve (113) is fixedly connected to a porous plate (133), and the spiral conveying frame (131) passes through the porous plate (133), and the porous plate (133) is located below the guide tube (112), the spiral conveying frame (131), the guide tube (112) and the porous plate (133) are located on the same axis, the one-way valve second (113) is fixedly connected to a mounting frame (134), the mounting frame (134) is rotatably connected to a rotating shaft three (135), the rotating shaft three (135) is fixedly connected to a gear two (136), the bottom of the spiral conveying frame (131) is fixedly connected to a gear three (137), the gear two (136) is meshed with the gear three (137), and a transmission assembly (138) is provided between the rotating shaft three (135) and the rotating shaft one (102).

9. A lithium battery silicon-carbon negative electrode material coating device as claimed in claim 8, characterized in that: The transmission assembly (138) comprises a driving wheel, a driven wheel and a transmission belt, one end of the rotating shaft 1 (102) is fixedly connected to the driving wheel, one end of the rotating shaft 3 (135) is fixedly connected to the driven wheel, and a transmission belt is wound between the driving wheel and the driven wheel.

10. A lithium battery silicon-carbon negative electrode material coating device as claimed in claim 2, characterized in that: It also includes a scraper frame (14), the scraper frame (14) being fixedly connected to the rotating shaft (102), the scraper frame (14) being located inside the heating tube (1), and the scraper frame (14) being in close contact with the lower part of the inner wall of the heating tube (1).

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