Preparation device of sodium ion battery negative electrode material

Abstract

The application relates to the technical field of battery preparation, in particular to a preparation device for a sodium-ion battery negative electrode material. The device comprises a frame, the frame is rotationally connected with a stirring barrel, the lower side of the stirring barrel is provided with a discharge pipe, the upper side of the stirring barrel is rotationally connected with a blocking cover, the blocking cover is provided with mirror image distributed feeding pipes, the blocking cover is fixedly connected with a first motor through a mounting frame, the stirring barrel and the blocking cover are jointly rotationally connected with a first rotating rod, the first rotating rod is fixedly connected with equidistantly distributed first sleeves and equidistantly distributed second sleeves, and the stirring barrel is fixedly connected with circumferentially arrayed measuring plates. The device can realize real-time monitoring of the viscosity of the material in the stirring barrel through cooperation of the measuring plates and the stirring barrel, can adjust the heating effect of the stirring barrel according to the viscosity of the material, can prevent excessive heating of the material caused by the combined action of stirring heat and external heating, and can ensure the output quality of the material.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of battery preparation, in particular to a preparation device for a negative electrode material of a sodium ion battery. BACKGROUND

[0002] The sodium ion battery is a kind of secondary battery, which mainly relies on the movement of sodium ions between the positive electrode and the negative electrode to work, and the working principle is similar to that of the lithium ion battery. In the prior art, when the negative electrode material is prepared, hard carbon powder, pitch powder and a solvent are usually heated and mixed, and a high-speed rotating stirring fan is used for stirring. As the pitch powder gradually melts, the viscosity of the mixed material in the stirring kettle gradually increases. When the high-speed rotating fan stirs the material, heat is generated between the material and the fan due to friction and impact between the material and the fan. When the heat source outside the stirring kettle is used to heat the material in the stirring kettle, the temperature of the material during stirring and mixing is too high. When the temperature is too high, the pitch is excessively softened or melted, and the structure stability is lost. This not only affects the viscosity of the pitch, but also changes the chemical properties of the pitch, thereby weakening the bonding force between the pitch and the hard carbon powder, and affecting the mixing effect of the material and the quality of the final electrode. SUMMARY

[0003] In order to overcome the problem of excessive heating of the material during stirring and affect the preparation quality of the material, the application provides a preparation device for a negative electrode material of a sodium ion battery, which can control the temperature.

[0004] The technical embodiment of the application is as follows: a preparation device for a negative electrode material of a sodium ion battery, comprising a frame, a stirring barrel rotatably connected to the frame, a discharge pipe arranged at the lower side of the stirring barrel, a blocking cover rotatably connected to the upper side of the stirring barrel, the blocking cover being provided with mirror image distributed feeding pipes, the blocking cover being fixedly connected to a first motor through a mounting frame, the stirring barrel and the blocking cover being rotatably connected to a first rotating rod, the output shaft of the first motor being fixedly connected to the first rotating rod, the first rotating rod being fixedly connected to equidistantly distributed first sleeves and equidistantly distributed second sleeves, the equidistantly distributed first sleeves and the equidistantly distributed second sleeves being staggered, the first sleeves and the second sleeves being fixedly connected to circumferentially arrayed stirring fan blades, the stirring barrel being fixedly connected to a heating pipe, a cavity being arranged in the side wall of the stirring barrel, the heating pipe being located in the cavity in the side wall of the stirring barrel, the stirring barrel being fixedly connected to circumferentially arrayed measuring plates, the stirring barrel being provided with a measuring mechanism for measuring the viscosity of the material in the stirring barrel and a temperature control mechanism for controlling the temperature of the heating pipe.

[0005] More preferably, a heat conducting medium is filled between the cavity in the side wall of the stirring barrel and the heating pipe, so as to uniformly distribute the heat.

[0006] More preferably, the measuring mechanism comprises a limiting ring, the limiting ring is fixed to the stirring barrel near one side of the rack, a first fixing frame is fixed in the rack, the stirring barrel is fixed with a first sliding plate, the first sliding plate is in sliding connection with the first fixing frame, and springs are arranged between the first sliding plate and the first fixing frame.

[0007] More preferably, a first fixed shell is fixed on the rack, a first piston rod is in sliding connection with the first fixed shell, an arc-shaped groove is arranged on the limiting ring, the depth of the groove on the limiting ring is gradually changed, the first piston rod is in extrusion connection with the arc-shaped groove on the limiting ring, the stirring barrel is fixed with mirror image distributed second fixed shells through mounting frames, the mirror image distributed second fixed shells are in communication with the first fixed shell through pipelines, and the second fixed shells are in sliding connection with second piston rods.

[0008] More preferably, the temperature control mechanism comprises a second fixing frame, the second fixing frame is fixed to the stirring barrel, the second fixing frame is fixed with mirror image distributed oil supply pipes, the mirror image distributed oil supply pipes are in communication with a mixing pipe, the mixing pipe is in communication with the heating pipe, the mixing pipe is rotatably connected with mirror image distributed rotating plates, the communication position of the mixing pipe and the heating pipe is between the mirror image distributed rotating plates, and the rotating plates are in sealing connection with the mixing pipe.

[0009] More preferably, the second fixing frame is rotatably connected with mirror image distributed second rotating rods, gears are arranged on the second rotating rods, the second fixing frame is in sliding connection with mirror image distributed first sliding frames, a rack is arranged on one side of the first sliding frame near the stirring barrel, the gears on the second rotating rods are in meshing connection with the racks on the adjacent first sliding frames, the second piston rods are fixed to the adjacent first sliding frames through mounting plates, the second rotating rods are in spline connection with sleeves, transmission rods are fixed to one side of the sleeves near the mirror image distributed rotating plates, and the transmission rods are in transmission connection with the adjacent sleeves.

[0010] More preferably, a third fixed shell is fixed to the second fixing frame, a third piston rod is in sliding connection with the third fixed shell, a threaded rod is rotatably connected to the second fixing frame, a fixed plate is fixed to the third piston rod, the fixed plate is in threaded connection with the threaded rod, a cavity is arranged in the second rotating rod, a fourth piston rod is in sliding connection with the cavity in the second rotating rod, the fourth piston rod is fixed to the adjacent sleeve, and the cavities in the mirror image distributed second rotating rods are in communication with the third fixed shell through pipelines.

[0011] More preferably, it further includes a scraping mechanism for scraping off viscous material adhering to the side wall of the mixing tank. The scraping mechanism is disposed on the mixing tank and includes a scraping ring slidably connected inside the mixing tank. The measuring plates arranged in a circumferential array are all slidably connected to the scraping ring. The scraping ring is rotatably connected to a second sliding frame, which is slidably connected to the sealing cover. The sealing cover is fixedly connected to a third fixing frame, which is slidably connected to a second sliding plate. The second sliding plate is fixedly connected to the second sliding frame. The sealing cover is rotatably connected to a bidirectional lead screw, which is rotatably connected to the third fixing frame and threadedly connected to the second sliding plate.

[0012] More preferably, a second motor is fixedly connected to the sealing cover via a mounting bracket, and a first transmission wheel is fixedly connected to the output shaft of the second motor. A third rotating rod is rotatably connected to the sealing cover, and the bidirectional lead screw and the third rotating rod are driven by a pulley and a belt. A second transmission wheel is splined to the third rotating rod, and the second transmission wheel is in transmission cooperation with the first transmission wheel.

[0013] More preferably, a rotating frame is slidably connected to the sealing cover via a mounting rod, the rotating frame is rotatably connected to the second transmission wheel, a fourth fixed shell is fixedly connected to the sealing cover, the fourth fixed shell is connected to the first fixed shell via a pipe, a fifth piston rod is slidably connected to the fourth fixed shell, and the fifth piston rod is fixedly connected to the rotating frame.

[0014] Compared with the prior art, the present invention has the following advantages: 1. The present invention uses a measuring plate in conjunction with a mixing tank to monitor the viscosity of the material in the mixing tank in real time, and adjusts the heating effect of the mixing tank according to the viscosity of the material, so as to prevent the heat generated by stirring and the external heating from causing the material to be overheated, thus ensuring the quality of the material output.

[0015] 2. The deflection angle of the mixing tank is monitored in real time by the cooperation of the limiting ring and the first piston rod, so that the change in viscosity of the material in the mixing tank is specifically reflected, which provides convenience for subsequent adjustment;

[0016] 3. By adjusting the ratio of hot and cold heat transfer oil entering the heating tube through the mirror-distributed rotating plates, the heating tube can flexibly adjust the heating or cooling effect on the mixing tank, so that the material in the mixing tank is cooled evenly, thus improving the practicality of this device.

[0017] 4. By cooperating with the first drive wheel, the scraping speed of the scraping ring is adjusted according to the viscosity of the material (the efficiency of the material adhering to the inner wall of the mixing tank). This ensures that a material adhesion layer is difficult to form on the inner wall of the mixing tank throughout the process, thereby improving the heating efficiency of the material while ensuring the quality of the material. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a three-dimensional structural diagram of the internal structure of the mixing tank of the present invention;

[0020] Figure 3 This is a three-dimensional structural diagram showing the positional relationship between the first and second rings of the present invention;

[0021] Figure 4 This is a three-dimensional structural diagram of the measuring mechanism of the present invention;

[0022] Figure 5 This is an exploded view showing the fit between the limiting ring and the first piston rod of the present invention;

[0023] Figure 6 This is a three-dimensional structural cross-sectional view of the temperature control mechanism of the present invention;

[0024] Figure 7 This is a three-dimensional structural cross-sectional view of the cooperation relationship between the mixing tube and the rotating plate of the present invention;

[0025] Figure 8 This is a three-dimensional structural diagram illustrating the fit between the sleeve and the transmission rod of the present invention;

[0026] Figure 9 This is a three-dimensional structural diagram of the scraping mechanism of the present invention;

[0027] Figure 10 This is a three-dimensional structural cross-sectional view of the cooperation relationship between the first transmission wheel and the second transmission wheel of the present invention.

[0028] The components in the attached diagram are labeled as follows: 1. Frame, 2. Mixing tank, 3. Sealing cap, 4. First motor, 5. First rotating rod, 6. First collar, 7. Second collar, 8. Mixing fan blade, 9. Heating tube, 10. Measuring plate, 11. Measuring mechanism, 1101. Limiting ring, 1102. First fixed frame, 1103. First sliding plate, 1104. First fixed shell, 1105. First piston rod, 1106. Second fixed shell, 1107. Second piston rod, 12. Temperature control mechanism, 1201. Second fixed frame, 1202. Oil supply pipe, 1203. Mixing pipe, 1204. Rotating plate, 1205. Second rotating rod 1206 Moving rod, 1207 First sliding frame, 1208 Sleeve, 1209 Transmission rod, 1210 Third fixed housing, 1211 Third piston rod, 1212 Threaded rod, 1213 Fixed plate, 1214 Fourth piston rod, 13 Scraping mechanism, 1301 Scraping ring, 1302 Second sliding frame, 1303 Third fixed frame, 1304 Second sliding plate, 1305 Bidirectional lead screw, 1306 Second motor, 1307 First transmission wheel, 1308 Third rotating rod, 1309 Second transmission wheel, 1310 Rotating frame, 1311 Fourth fixed housing, 1312 Fifth piston rod. Detailed Implementation

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] In existing technologies, the preparation of negative electrode materials typically involves heating and mixing hard carbon powder, asphalt powder, and solvent, along with a high-speed rotating agitator. As the asphalt powder gradually melts, the viscosity of the mixture inside the mixing vessel gradually increases. The high-speed rotating agitator generates heat due to friction and impact between the material and the blades. When combined with external heat sources to heat the material, the temperature during mixing becomes excessively high. This excessively high temperature can lead to over-softening or melting of the asphalt, resulting in a loss of structural stability. This not only affects the viscosity of the asphalt but may also alter its chemical properties, weakening its bond with the hard carbon powder, thus impacting the mixing effect and the final electrode quality.

[0031] Example 1: An apparatus for preparing a sodium-ion battery negative electrode material, such as... Figures 1-3As shown, the device includes a frame 1, which consists of a cylinder and two mirror-image legs. A mixing tank 2 is rotatably connected to the cylindrical portion of the frame 1. A discharge pipe is located on the lower side of the mixing tank 2 for discharging the prepared material. A sealing cap 3 is rotatably connected to the upper side of the mixing tank 2. Two feed pipes, mirror-image, are located on the upper side of the sealing cap 3. The right feed pipe injects solvent into the mixing tank 2, and the left feed pipe injects powder into the mixing tank 2. A first motor 4 is fixedly connected to the upper side of the sealing cap 3 via a mounting bracket. A first rotating rod 5, fixedly connected to the output shaft of the first motor 4, is rotatably connected to both the mixing tank 2 and the sealing cap 3. The portion of the first rotating rod 5 located inside the mixing tank 2 is fixedly connected to three first rings 6 and two second rings 7, equidistantly distributed vertically. The three first rings 6 and the two second rings 7 are staggered vertically. A circumferentially arrayed... The mixing blades 8 are arranged in a staggered pattern in the circumferential array of the first ring 6 and the second ring 7, thereby enhancing the mixing effect of the material in the mixing tank 2. The mixing tank 2 is fixedly connected to a heating pipe 9 for providing a heat source. The output port of the heating pipe 9 is connected to an external heat transfer oil system. An annular chamber is provided in the side wall of the mixing tank 2. The heating pipe 9 is located in the chamber in the side wall of the mixing tank 2. The part of the heating pipe 9 in the chamber in the side wall of the mixing tank 2 is spiral-shaped, which is used to provide uniform heating for the mixing tank 2. The annular chamber of the mixing tank 2 and the heating pipe 9 are filled with heat-conducting sand. Since the heat-conducting sand has a low specific heat capacity, it is used to distribute the heat of the heating pipe 9 evenly and transfer the heat quickly. A measuring plate 10 is fixedly connected to the inner side wall of the mixing tank 2 in a circumferential array. The mixing tank 2 is provided with a measuring mechanism 11 for judging the viscosity of the material inside and a temperature control mechanism 12 for controlling the temperature of the heating pipe 9.

[0032] like Figure 2 , Figure 4 and Figure 5As shown, the measuring mechanism 11 includes a limiting ring 1101, which is fixed to the lower part of the outer wall of the mixing tank 2. An arc-shaped groove is provided in the middle of the left side of the limiting ring 1101, and the depth of the arc-shaped groove gradually decreases from front to back. A first fixing frame 1102 is fixed to the inner side of the cylindrical part of the frame 1. The first fixing frame 1102 consists of a rectangular plate and an arc-shaped rod. A first sliding plate 1103 is fixed to the lower part of the outer wall of the mixing tank 2. The first sliding plate 1103 is slidably connected to the arc-shaped rod part of the first fixing frame 1102. The end of the arc-shaped rod of the first fixing frame 1102 is inclined away from the axis of the mixing tank 2 to limit the first sliding plate 1103. A spring is provided between the rectangular plate portion of the first fixed frame 1102 and the frame 03, and the spring is initially compressed. The front side of the cylindrical portion of the frame 1 is fixedly connected to the first fixed shell 1104, which is filled with hydraulic oil. The first fixed shell 1104 is slidably connected to the first fixed shell 1105, which is pressed and engaged with the arc-shaped groove on the limiting ring 1101. The left side of the mixing tank 2 is fixedly connected to two second fixed shells 1106 distributed in a front-to-back mirror shape via a mounting bracket. The second fixed shells 1106 are filled with hydraulic oil. The two second fixed shells 1106 are connected to the first fixed shell 1104 through a pipe. The second fixed shell 1106 is slidably connected to the second piston rod 1107.

[0033] like Figure 1 and Figure 6 As shown, the temperature control mechanism 12 includes a second fixed frame 1201, which is fixed to the left side of the mixing tank 2. The second fixed frame 1201 is fixed to two oil pipes 1202 that are distributed in a front-to-back mirror image. The front oil pipe 1202 is used to transport hot heat transfer oil, and the rear oil pipe 1202 is used to transport cold heat transfer oil. The right end ports of the two oil pipes 1202 are connected to a mixing pipe 1203 for mixing hot and cold heat transfer oil. The right side of the middle part of the mixing pipe 1203 is connected to the heating pipe 9. The mixing pipe 1203 is rotatably connected to two rotating plates 1204 that are distributed in a front-to-back mirror image. The connection between the mixing pipe 1203 and the heating pipe 9 is located in the middle of the two rotating plates 1204. Both rotating plates 1204 are sealed to the mixing pipe 1203.

[0034] like Figure 6 and Figure 7As shown, two second rotating rods 1205, arranged in a front-to-back mirror distribution, are rotatably connected to the upper side of the second fixed frame 1201. Each of the two second rotating rods 1205 is equipped with a gear. Two first sliding frames 1206, arranged in a front-to-back mirror distribution, are slidably connected to the second fixed frame 1201. The first sliding frame 1206 is an L-shaped plate. A rack that meshes with the gear on the second rotating rod 1205 is provided on the right side of the first sliding frame 1206. The second piston rod 1107 is fixedly connected to the adjacent first sliding frame 1206 through a mounting plate. A sleeve 1207 is splinedly connected to the upper side of the second rotating rod 1205. A splined groove is provided inside the sleeve 1207. A transmission rod 1208 is fixedly connected to the lower side of the rotating plate 1204. A spline is provided on the lower part of the transmission rod 1208. The splined part on the lower side of the transmission rod 1208 is in transmission engagement with the splined groove on the adjacent sleeve 1207.

[0035] like Figures 6-8 As shown, a third fixed shell 1209 is fixedly connected to the upper side of the second fixed frame 1201. The third fixed shell 1209 is filled with hydraulic oil. The third fixed shell 1209 is slidably connected to a third piston rod 1210. A threaded rod 1211 is rotatably connected to the upper side of the second fixed frame 1201. A fixed plate 1212, which is threadedly connected to the threaded rod 1211, is fixedly connected to the third piston rod 1210. A cylindrical cavity is provided in the middle of the inner side of the second rotating rod 1205. The cylindrical cavity is filled with hydraulic oil. A fourth piston rod 1213, which is fixedly connected to the adjacent sleeve 1207, is slidably connected to the inner cavity of the second rotating rod 1205. The inner cavities of the two second rotating rods 1205 are connected to the third fixed shell 1209 through pipes.

[0036] When this device is used to prepare sodium-ion battery anode materials, the user first determines the ratio of hard carbon powder to asphalt powder and premixes the powders. Then, the user determines the required temperature for mixing the powders and solvents. The user rotates the two rotating plates 1204 counterclockwise. The front rotating plate 1204 controls the flow rate of the hot heat-conducting oil, and the rear rotating plate 1204 controls the flow rate of the cold heat-conducting oil. The user adjusts the ratio of hot and cold heat-conducting oil to achieve the required temperature for mixing the powders and solvents. At this point, the heat-conducting oil ratio is adjusted.

[0037] After the hot oil ratio is adjusted, the user rotates the threaded rod 1211. The threaded rod 1211 drives the fixed plate 1212 to move downwards. The fixed plate 1212 drives the third piston rod 1210 to move downwards. At the same time, the hydraulic oil in the third fixed shell 1209 is squeezed into the internal chambers of the two second rotating rods 1205 through the front and rear pipes. After the hydraulic oil enters the internal chambers of the second rotating rods 1205, the hydraulic oil squeezes and drives the two fourth piston rods 1213 to move upwards. The fourth piston rods 1213 drive the adjacent sleeves 1207 to move upwards until the transmission rod 1208 is embedded in the adjacent sleeves 1207. The user stops rotating the threaded rod 1211. At this time, the temperature control process is ready.

[0038] After the temperature control process is completed, the user injects hot heat transfer oil into the front oil supply pipe 1202 and cold heat transfer oil into the rear oil supply pipe 1202. The heat transfer oils from both sides are mixed in the middle of the mixing pipe 1203 through the gap between the two rotating plates 1204 and the mixing pipe 1203. The mixed hydraulic oil flows into the heating pipe 9 and the heat is evenly distributed by the heat-conducting sand in the side wall cavity of the mixing tank 2 before heating the mixing tank 2. The heated heat transfer oil flows to the left through the heating pipe 9 into the external heat transfer oil system. Then, the user feeds the oil through the feed port on the right side of the sealing cover 3. Sufficient solvent is injected into the mixing tank 2 through the tube. The mixing tank 2 heats the solvent until it reaches the temperature required for the powder and solvent to be mixed and stirred. The user adds the mixed powder in batches through the feed pipe on the left side of the sealing cap 3 into the mixing tank 2. At the same time, the user starts the first motor 4. The output shaft of the first motor 4 drives the first rotating rod 5 to rotate. The first rotating rod 5 drives the three first rings 6 and the two second rings 7 to rotate together. The three first rings 6 and the two second rings 7 together drive all the stirring blades 8 to rotate, thereby mixing and stirring the powder and solvent.

[0039] During the above mixing process, the stirring blade 8 drives the powder and solvent to rotate together and mix them. As the asphalt powder gradually melts and mixes, the viscosity of the mixture of powder and solvent (hereinafter referred to as material) in the mixing tank 2 will gradually increase. When the stirring blade 8 rotates, the stirring blade 8 drives the circumferentially arrayed measuring plate 10 and the mixing tank 2 to rotate together through the material extrusion. As the viscosity of the material increases, the deflection angle of the circumferentially arrayed measuring plate 10 and the mixing tank 2 relative to the frame 1 becomes larger.

[0040] When the mixing tank 2 rotates under the combined action of the mixing blades 8, the material, and the measuring plate 10, the mixing tank 2 drives the limiting ring 1101 and the first sliding plate 1103 to rotate synchronously. At the same time, it compresses the spring between the first sliding plate 1103 and the first fixed frame 1102. When the limiting ring 1101 rotates, the arc-shaped limiting groove on the limiting ring 1101 compresses and drives the first piston rod 1105 to move forward, while simultaneously compressing the spring between the first piston rod 1105 and the first fixed shell 1104. The hydraulic oil in the first fixed shell 1104 is compressed by the first piston rod 1105. The hydraulic oil flows through pipes into the two second fixed housings 1106, compressing and driving the two second piston rods 1107 to move in opposite directions. The two second piston rods 1107 drive the two first sliding frames 1206 to move in opposite directions. The rack on the front first sliding frame 1206 meshes with the gear on the front second rotating rod 1205, causing the front second rotating rod 1205 to rotate clockwise. The front second rotating rod 1205 drives the front rotating plate 1204 to rotate clockwise through the front sleeve 1207 and the front transmission rod 1208, thereby reducing the speed of the front rotating plate. The gap between the mixing tube 1204 and the mixing tube 1203 is reduced (i.e., the flow rate of the heat transfer oil is decreased). Conversely, the rack on the first sliding frame 1206 meshes with the gear on the second rotating rod 1205, causing the second rotating rod 1205 to rotate counterclockwise. The second rotating rod 1205, through the rear sleeve 1207 and the rear transmission rod 1208, causes the rear rotating plate 1204 to rotate counterclockwise, thereby increasing the gap between the rear rotating plate 1204 and the mixing tube 1203 (i.e., increasing the flow rate of the cold heat transfer oil). At this time, the temperature of the mixed heat transfer oil in the mixing tube 1203 gradually increases. The heating element 9 is used to reduce the temperature of the material inside the mixing tank 2, thereby preventing overheating of the material inside the mixing tank 2. The deflection angle of the mixing tank 2 is monitored in real time by the limiting ring 1101 and the first piston rod 1105, so that the change in viscosity of the material inside the mixing tank 2 is specifically reflected, which provides convenience for subsequent adjustment. The viscosity of the material inside the mixing tank 2 is monitored in real time by the measuring plate 10 and the mixing tank 2, and the heating effect of the mixing tank 2 is adjusted according to the viscosity of the material, so as to prevent the heat generated by stirring and the external heating from causing overheating of the material and ensuring the quality of the output material.

[0041] The user repeats the above steps to mix the material in the mixing tank 2 until the mixing time is over. At this point, the material needs to be cooled. The user rotates the threaded rod 1211 in the reverse direction. The threaded rod 1211 drives the third piston rod 1210 to reset. The oil flow back causes the two sleeves 1207 to move downwards and reset. Then, the user rotates the rear rotating plate 1204 to the maximum flow position (i.e., the angle deviation from the initial position is 90°), and at the same time resets the front rotating plate 1204 (i.e., the closed state). At this time, the cold heat transfer oil uniformly cools the material in the mixing tank 2 through the heating pipe 9 and the heat transfer sand. Meanwhile, the user gradually slows down the rotation speed of the output shaft of the first motor 4 until... Once the material in the mixing tank 2 has cooled completely, the user turns off the first motor 4, and the spring between the first sliding plate 1103 and the first fixed frame 1102 drives the mixing tank 2 and the material inside to reset. Then, the user discharges the cooled material through the discharge pipe on the lower side of the mixing tank 2. The user then repeats the above steps to continue preparing the sodium-ion battery negative electrode material until all materials are prepared. At this point, the device is no longer in use. The rotating plate 1204, which is distributed in a mirror image, is used to adjust the ratio of hot and cold heat transfer oil entering the heating tube 9, so that the heating tube 9 can flexibly adjust the heating or cooling effect on the mixing tank 2, so that the material in the mixing tank 2 is cooled evenly, thus improving the practicality of the device.

[0042] When the mixing tank 2 and its parts are reset, the mixing tank 2 drives the limiting ring 1101 to reset and loses its pressure on the first piston rod 1105. The spring between the first piston rod 1105 and the first fixed shell 1104 drives the first piston rod 1105 to reset. The oil circuit return drives the second piston rod 1107 and the first sliding frame 1206 to reset.

[0043] In the existing technology, when preparing negative electrode materials, because they are viscous fluids, these viscous fluids adhere to the inner wall of the stirred tank, thereby affecting the heat transfer effect of the external heat transfer oil, which in turn leads to uneven temperature distribution of the material in the stirred tank (i.e., local overheating), affecting the quality of the negative electrode material.

[0044] Example 2: Based on Example 1, such as Figure 1 and Figure 9As shown, it also includes a scraping mechanism 13 for scraping off viscous material adhering to the side wall of the mixing tank 2. The scraping mechanism 13 is disposed on the mixing tank 2 and includes a scraping ring 1301. The upper and lower sides of the scraping ring 1301 are provided with inclined surfaces to guide the material to move towards the center of the mixing tank 2. The scraping ring 1301 is slidably connected to the inner side of the mixing tank 2. The measuring plates 10 distributed in a circumferential array are all slidably connected to the scraping ring 1301. The inner ring of the scraping ring 1301 is rotatably connected to a second sliding frame 1302 that is slidably connected to the sealing cover 3. 1302 consists of a ring and a cylindrical rod. A third fixing frame 1303 is fixedly connected to the upper side of the sealing cover 3. The third fixing frame 1303 consists of a cylinder and a rectangular plate. A second sliding plate 1304 is slidably connected to the cylindrical part of the third fixing frame 1303. The second sliding plate 1304 is fixedly connected to the cylindrical rod part of the second sliding frame 1302. A bidirectional screw 1305 is rotatably connected to the upper side of the sealing cover 3 and threadedly connected to the second sliding plate 1304. The upper side of the bidirectional screw 1305 is rotatably connected to the rectangular plate part of the third fixing frame 1303.

[0045] like Figure 1 , Figure 2 , Figure 9 and Figure 10 As shown, a second motor 1306 is fixedly connected to the upper side of the sealing cover 3 via a mounting bracket. The output shaft of the second motor 1306 is fixedly connected to a first transmission wheel 1307, which is a frustum-shaped friction wheel with a diameter that gradually decreases from top to bottom. A third rotating rod 1308 is rotatably connected to the upper side of the sealing cover 3. A two-way lead screw 1305 and the third rotating rod 1308 are driven by a pulley and a belt. The third rotating rod 1308 is splinedly connected to a second transmission wheel 1309, which is a disc-shaped wheel. The friction wheel, the second transmission wheel 1309 and the first transmission wheel 1307 are driven by friction. The upper side of the sealing cover 3 is slidably connected to the rotating frame 1310 which is rotatably connected to the second transmission wheel 1309 via the mounting rod. The upper side of the sealing cover 3 is fixedly connected to the fourth fixed shell 1311, which is filled with hydraulic oil. The fourth fixed shell 1311 is connected to the first fixed shell 1104 via a pipe. The fourth fixed shell 1311 is slidably connected to the fifth piston rod 1312 which is fixedly connected to the rotating frame 1310.

[0046] During the mixing process, the user turns on the second motor 1306. The output shaft of the second motor 1306 drives the first transmission wheel 1307 to rotate. The first transmission wheel 1307 drives the second transmission wheel 1309 to rotate by friction. The second transmission wheel 1309 drives the third rotating rod 1308 to rotate. The third rotating rod 1308 drives the bidirectional lead screw 1305 to rotate through the pulley and belt. The bidirectional lead screw 1305 drives the second sliding plate 1304 to move up and down reciprocally. The second sliding plate 1304 drives the scraping ring 1301 to move up and down reciprocally through the second sliding frame 1302 and scrapes off the material adhering to the side wall of the mixing tank 2, thereby preventing the material adhering to the side wall of the mixing tank 2 from affecting heat conduction. The scraped material moves towards the axis of the mixing tank 2 after being guided by the scraping ring 1301, thereby mixing the material inside and outside the mixing tank 2.

[0047] During the material preparation process, the viscosity of the material gradually increases, so the adhesion efficiency of the material to the side wall of the mixing tank also increases accordingly. To ensure the heat conduction efficiency of the side wall of the mixing tank, the following operations are required:

[0048] When the viscosity of the material inside the mixing tank 2 increases, some of the hydraulic oil in the first fixed shell 1104 is squeezed and flows through the pipe to the fourth fixed shell 1311. The hydraulic oil squeezes and drives the fifth piston rod 1312 to move upward. The fifth piston rod 1312 drives the rotating frame 1310 to move upward. The rotating frame 1310 drives the second transmission wheel 1309 to move upward, thereby increasing the transmission ratio between the second transmission wheel 1309 and the first transmission wheel 1307, and thus increasing the rotation speed of the bidirectional screw 1305 (i.e., the speed at which the scraping ring 1301 moves up and down), thereby removing the residue adhering to the inner wall of the mixing tank 2. The material is scraped off in a timely manner. The scraping speed of the scraping ring 1301 is adjusted according to the viscosity of the material (the efficiency of the material adhering to the inner wall of the mixing tank 2) to ensure that the inner wall of the mixing tank 2 is difficult to form a material adhesion layer throughout the process. This improves the heating efficiency of the material while ensuring the quality of the material. After the device is used, the user cleans the mixing tank 2. After cleaning, the user drives the scraping ring 1301 to reset by rotating the second motor 1306 and then turns off the second motor 1306.

[0049] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. An apparatus for preparing a sodium-ion battery negative electrode material, characterized in that, The machine includes a frame (1), a mixing tank (2) rotatably connected to the frame (1), a discharge pipe on the lower side of the mixing tank (2), a sealing cover (3) rotatably connected to the upper side of the mixing tank (2), a feed pipe with mirror-distributed on the sealing cover (3), a first motor (4) fixedly connected to the sealing cover (3) via a mounting bracket, a first rotating rod (5) rotatably connected to the mixing tank (2) and the sealing cover (3), the output shaft of the first motor (4) fixedly connected to the first rotating rod (5), and a first set of rings (6) and a second set of rings (7) equidistantly distributed on the first rotating rod (5). The first ring (6) of the cloth is staggered with the second ring (7) which are equally distributed. Both the first ring (6) and the second ring (7) are fixed with stirring blades (8) arranged in a circumferential array. The stirring tank (2) is fixed with a heating tube (9). A chamber is provided in the side wall of the stirring tank (2). The heating tube (9) is located in the chamber in the side wall of the stirring tank (2). A measuring plate (10) arranged in a circumferential array is fixed in the stirring tank (2). The stirring tank (2) is provided with a measuring mechanism (11) for judging the viscosity of the material inside and a temperature control mechanism (12) for controlling the temperature of the heating tube (9). The measuring mechanism (11) includes a limiting ring (1101), which is fixed to the side of the mixing tank (2) near the frame (1). A first fixed frame (1102) is fixed inside the frame (1), and a first sliding plate (1103) is fixed to the mixing tank (2). The first sliding plate (1103) is slidably connected to the first fixed frame (1102), and a spring is provided between the first sliding plate (1103) and the first fixed frame (1102). A first fixed shell (1104) is fixedly connected to the frame (1). A first piston rod (1105) is slidably connected to the first fixed shell (1104). An arc-shaped groove is provided on the limiting ring (1101), and the groove depth is gradually changing. The first piston rod (1105) is pressed into the arc-shaped groove on the limiting ring (1101). A second fixed shell (1106) is fixedly connected to the mixing tank (2) by a mounting bracket. The mirror-distributed second fixed shells (1106) are connected to the first fixed shell (1104) through a pipe. A second piston rod (1107) is slidably connected to the second fixed shell (1106). The temperature control mechanism (12) includes a second fixed frame (1201), which is fixed to the stirring tank (2). The second fixed frame (1201) is fixed to a mirror-distributed oil supply pipe (1202). The mirror-distributed oil supply pipe (1202) is connected to a mixing pipe (1203). The mixing pipe (1203) is connected to the heating pipe (9). The mixing pipe (1203) is rotatably connected to a mirror-distributed rotating plate (1204). The connection between the mixing pipe (1203) and the heating pipe (9) is located between the mirror-distributed rotating plates (1204). The rotating plate (1204) and the mixing pipe (1203) are sealed together.

2. The apparatus for preparing a sodium-ion battery negative electrode material according to claim 1, characterized in that, The chamber inside the side wall of the mixing tank (2) and the heating tube (9) are filled with a heat-conducting medium to distribute heat evenly.

3. The apparatus for preparing a sodium-ion battery negative electrode material according to claim 2, characterized in that, The second fixed frame (1201) is rotatably connected to a mirror-distributed second rotating rod (1205). A gear is provided on the second rotating rod (1205). The second fixed frame (1201) is slidably connected to a mirror-distributed first sliding frame (1206). A rack is provided on the side of the first sliding frame (1206) near the mixing tank (2). The gear on the second rotating rod (1205) meshes with the rack on the adjacent first sliding frame (1206). The second piston rod (1107) is fixedly connected to the adjacent first sliding frame (1206) through a mounting plate. A sleeve (1207) is splined connected to the second rotating rod (1205). A transmission rod (1208) is fixedly connected on the side of the rotating plate (1204) near the mirror-distributed sleeve (1207). The transmission rod (1208) is in transmission engagement with the adjacent sleeve (1207).

4. The apparatus for preparing a sodium-ion battery negative electrode material according to claim 3, characterized in that, A third fixed shell (1209) is fixedly connected to the second fixed frame (1201). A third piston rod (1210) is slidably connected to the third fixed shell (1209). A threaded rod (1211) is rotatably connected to the second fixed frame (1201). A fixed plate (1212) is fixedly connected to the third piston rod (1210). The fixed plate (1212) is threadedly connected to the threaded rod (1211). A cavity is provided inside the second rotating rod (1205). A fourth piston rod (1213) is slidably connected to the internal cavity of the second rotating rod (1205). The fourth piston rod (1213) is fixedly connected to the adjacent sleeve (1207). The internal cavities of the mirror-distributed second rotating rods (1205) are all connected to the third fixed shell (1209) through pipes.

5. The apparatus for preparing a sodium-ion battery negative electrode material according to claim 4, characterized in that, It also includes a scraping mechanism (13) for scraping off viscous material adhering to the side wall of the mixing tank (2). The scraping mechanism (13) is disposed on the mixing tank (2). The scraping mechanism (13) includes a scraping ring (1301). The scraping ring (1301) is slidably connected to the mixing tank (2). The measuring plates (10) distributed in a circumferential array are all slidably connected to the scraping ring (1301). The scraping ring (1301) is rotatably connected to a second sliding frame (1302). The second sliding frame (1302) The sealing cover (3) is slidably connected to the sealing cover (3), the sealing cover (3) is fixedly connected to the third fixing frame (1303), the third fixing frame (1303) is slidably connected to the second sliding plate (1304), the second sliding plate (1304) is fixedly connected to the second sliding frame (1302), the sealing cover (3) is rotatably connected to the bidirectional screw (1305), the bidirectional screw (1305) is rotatably connected to the third fixing frame (1303), and the bidirectional screw (1305) is threadedly connected to the second sliding plate (1304).

6. The apparatus for preparing a sodium-ion battery negative electrode material according to claim 5, characterized in that, The sealing cover (3) is fixedly connected to a second motor (1306) by a mounting bracket. The output shaft of the second motor (1306) is fixedly connected to a first transmission wheel (1307). The sealing cover (3) is rotatably connected to a third rotating rod (1308). The bidirectional lead screw (1305) and the third rotating rod (1308) are driven by a pulley and a belt. The third rotating rod (1308) is splinedly connected to a second transmission wheel (1309). The second transmission wheel (1309) is in transmission cooperation with the first transmission wheel (1307).

7. The apparatus for preparing a sodium-ion battery negative electrode material according to claim 6, characterized in that, A rotating frame (1310) is slidably connected to the sealing cover (3) via an installation rod. The rotating frame (1310) is rotatably connected to the second transmission wheel (1309). A fourth fixed shell (1311) is fixedly connected to the sealing cover (3). The fourth fixed shell (1311) is connected to the first fixed shell (1104) via a pipe. A fifth piston rod (1312) is slidably connected to the fourth fixed shell (1311). The fifth piston rod (1312) is fixedly connected to the rotating frame (1310).

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