Automatic bowl loading system for sodium ion battery positive electrode material

Abstract

The utility model discloses an automatic bowl loading system for a sodium ion battery positive electrode material, which comprises a conical mixer, an extruder arranged at the downstream of the conical mixer, a briquetting machine arranged at the downstream of the extruder, and a positive and negative pressure integrated air pump, the conical mixing machine comprises an inverted conical box body and an air intake and exhaust machine, one end part of the air intake and exhaust machine is communicated with the box body, the air intake and exhaust machine is used for extracting air from the box body or introducing air into the box body, and the positive and negative pressure integrated air pump is communicated with the other end of the air intake and exhaust machine. The positive and negative pressure integrated air pump and the air intake and exhaust machine remove air in gaps of raw materials, in addition, the materials can be further compacted through extrusion blanking of the blanking stirring shaft and the extrusion stirring shaft, moisture and air in the materials can be effectively discharged, the compactness of the positive electrode materials can be effectively improved, the blanking speed is stabilized, and the production efficiency is improved. The raw material loss is reduced.

Description

Technical Field

[0001] The utility model relates to the field of lithium ion battery material sintering equipment, in particular to an automatic filling system for sodium ion battery positive electrode materials. Background Art

[0002] In the production of powder materials, such as sodium-ion and lithium-ion battery cathode materials, the materials to be sintered are pre-mixed in a mixing device, then fed through a feeding device and loaded into saggers before being fed into a kiln for high-temperature sintering. To ensure the consistency and quality of the sintered materials, precise control is required over the loading volume and the surface smoothness within the saggers. In practice, powders can exhibit excessive flowability, high porosity, and high water absorption. This can lead to powder spraying during feeding, leakage during loading, and loose packing. This reduces production capacity, wastes raw materials, pollutes the production environment, significantly increases the frequency and scale of dust removal equipment, and increases costs. Investigations have shown that the primary cause of loose packing, spraying, and leakage is that the materials mixed in the mixing device are in powder form, have a high air content, exhibit good flowability, and are more susceptible to water absorption. However, after a period of degassing in the container, air and water vapor escape, the powder's flowability is significantly reduced, and the packing weight naturally increases significantly.

[0003] Because sodium-ion battery cathode materials are highly sensitive to humidity during production and processing, many companies maintain strict industrial environmental standards in their workshops. This, coupled with the need to increase cathode material production capacity, necessitates continued cost reduction and the transition to zero-carbon production. Therefore, cathode material companies must continue to focus on reducing production costs through increased production capacity, while also balancing material performance. Summary of the Invention

[0004] The purpose of the utility model is to provide an automatic filling system for sodium ion battery positive electrode materials, which can effectively increase the filling amount of sodium ion battery positive electrode materials, significantly reduce the water content of the materials before the sodium ion battery positive electrode materials are filled into the kiln, reduce the generation of waste and dust, and improve the environment of the production workshop; it can not only improve the production capacity of the production process and reduce production costs, but also greatly reduce the degree to which the materials are affected by environmental processes.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: an automatic filling system for sodium ion battery positive electrode materials, which includes a conical mixer, an extruder arranged downstream of the conical mixer, and a briquetting machine arranged downstream of the extruder. The automatic filling system also includes a positive and negative pressure integrated air pump, the conical mixer includes an inverted conical box, one end of which is connected to the box and is used to extract gas from or introduce gas into the box, and the positive and negative pressure integrated air pump is connected to the other end of the air intake and exhaust fan.

[0006] In another embodiment, the upper end cover of the box body is provided with a feed port and an air inlet and outlet, the air intake and exhaust fan includes a first mounting plate covered on the air inlet and outlet, and a guide cylinder whose upper end is fixed to the lower end surface of the first mounting plate and passes through the air inlet and outlet, the air intake and exhaust fan is installed on the first mounting plate, and the air intake and exhaust fan and the positive and negative pressure integrated air pump can each operate individually or synchronously and can extract air from or blow air into the box body. The exhaust speed is faster when exhausting air outwards synchronously, and the blowing speed is faster when blowing air inwards synchronously.

[0007] In another embodiment, the outer side wall of the guide cylinder is sealed to the inner side wall of the air inlet and outlet.

[0008] In another embodiment, the conical mixer includes a mixing motor provided on an upper end cover of the box body, and a spiral feeding stirring shaft provided in the box body and drivingly connected to an output shaft of the mixing motor.

[0009] In another embodiment, the unloading stirring shaft is provided with a scraping mechanism for promptly scraping off the material accumulated on the inner wall of the box body. The scraping mechanism includes a fixed ring fixedly mounted on the stirring shaft, a support rod whose proximal end is fixed to the fixed ring and extends radially along the box body, and a scraper fixed to the distal end of the support rod and extending along the inclined side wall of the box body. When the unloading stirring shaft rotates, the scraper adheres to the inner wall of the box body and rotates around the unloading stirring shaft.

[0010] In another embodiment, the extruder includes an extrusion frame, an extrusion box mounted on the extrusion frame and having a feed port connected to a discharge port below the box body, an extrusion stirring shaft rotatably connected to the extrusion box and having a spiral shape, and an extrusion motor mounted on the extrusion frame and used to drive the extrusion stirring shaft.

[0011] In another embodiment, the briquetting machine includes a briquetting machine frame, a feeding pipe connected to the discharge port on the extrusion box and with the lower end mounted on the briquetting machine frame, a reduction scale provided on the feeding pipe, a feeding mechanism provided below the briquetting machine frame, a forming bowl box, and a pressing part. The feeding mechanism drives the forming bowl box to move from below the feeding pipe to below the pressing part. After the pressure head of the pressing part moves downward, it compacts the material in the forming bowl box, and then the material is clamped by a robot and transferred to the kiln feeding procedure.

[0012] In another embodiment, the pressing part includes a hydraulic press installed on the briquetting machine frame and an upper pressing head installed on the lower end of the telescopic rod of the hydraulic press.

[0013] In another embodiment, the feeding mechanism includes a feeding frame, a base installed on the feeding frame, a rotary table rotatably connected to the base, a rotating motor driving the rotary table to rotate, a worm gear assembly and a pulley assembly installed on the base for transmission, the rotating motor drives the pulley assembly to move, the rotating motor drives the pulley assembly to move, and then drives the worm gear to move, and finally drives the rotary table to rotate, the lower pressing head includes a lifting cylinder fixed on the feeding frame, a fixing rod distributed around the jacking cylinder and fixed on the feeding frame, and a lower pressure plate sleeved on the fixing rod, the upper end portion of the jacking cylinder can rise to the bottom of the lower pressure plate and lift the lower pressure plate to the bottom of the rotary table, so that the lower pressure plate is in contact with the lower end surface of the rotary table for cooperating with the upper pressing head to complete the pressing.

[0014] In another embodiment, the worm gear assembly includes a worm wheel fixedly connected to and coaxially arranged with the rotating table, and a worm rotatably connected to the base and engaged with the worm wheel, and the pulley assembly is connected between the worm and the output shaft of the rotating motor.

[0015] Due to the application of the above-mentioned technical scheme, the utility model has the following advantages compared with the prior art: the positive and negative pressure integrated air pump and the air intake and exhaust fan remove the gas between the gaps of the raw materials. In addition, the material can be further compacted by the feeding stirring shaft and the extrusion stirring shaft, so that the moisture and gas in the material can be effectively discharged, which can effectively improve the compactness of the positive electrode material, stabilize the feeding speed, and reduce the loss of raw materials; at the same time, the material filling amount is accurately controlled by the reduction scale, and the material compaction degree is further improved by multiple compaction filling processes; the degassing, extrusion and compaction processes increase the weight of the filling, reduce the degree of contact between the material and the external environment, avoid moisture absorption after the front end of the sodium positive electrode material contacts the air before entering the furnace, inhibit the segregation of elements, and ensure that the chemical properties of the ternary material are not lost; reduce the pores of the raw materials, increase the compactness of the raw materials before sintering in the furnace, greatly improve the production capacity, and there is no powder spraying and powder leakage during the whole process, reduce the use of dust removal equipment, and greatly reduce production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Attachment Figure 1 It is a structural diagram of the present utility model. DETAILED DESCRIPTION

[0017] like Figure 1 As shown, the automatic loading system for positive electrode materials of sodium ion batteries includes a conical mixer 1, an extruder 2 arranged downstream of the conical mixer 1, and a briquetting machine 3 arranged downstream of the extruder 2. The automatic loading system also includes a positive and negative pressure integrated air pump 4. The conical mixer 1 includes an inverted conical box 11, one end of which is connected to the box 11 and is used to extract gas from or introduce gas into the box 11. The positive and negative pressure integrated air pump 4 is connected to the other end of the air pump 12.

[0018] Specifically, the upper end cover of the housing 11 is provided with a feed port 13 and an air inlet and outlet 14. The air intake and exhaust fan 12 includes a first mounting plate 15 covering the air inlet and outlet 14, a guide cylinder 16 having an upper end fixed to the lower end surface of the first mounting plate 15 and extending through the air inlet and outlet 14, and a filter 111 provided at the lower end of the guide cylinder 16. The air intake and exhaust fan 12 is mounted on the first mounting plate 15. The air intake and exhaust fan 12 and the positive and negative pressure integrated air pump 4 can both be operated independently or synchronously to extract air from or blow air into the housing 11. The extraction speed is faster when the air is extracted synchronously, and the blowing speed is faster when the air is blown synchronously. The outer wall of the guide cylinder 16 is sealed with the inner wall of the air inlet and outlet 14.

[0019] The conical mixer 1 includes a mixing motor 17 mounted on the upper end cover of the housing 11, and a spiral feed stirring shaft 18 disposed within the housing 11 and drivingly connected to the output shaft of the mixing motor 17. A scraping mechanism is provided on the feed stirring shaft 18 for promptly scraping off material accumulated on the inner wall of the housing 11. The scraping mechanism includes a fixed ring 19 fixedly mounted on the stirring shaft, a support rod 10 whose proximal end is fixed to the fixed ring 19 and extends radially along the housing 11, and a scraper 110 fixed to the distal end of the support rod 10 and extending along the inclined side wall of the housing 11. When the feed stirring shaft 18 rotates, the scraper 110 adheres to the inner wall of the housing 11 and rotates around the feed stirring shaft 18.

[0020] The extruder 2 includes an extrusion frame 25, an extrusion box 21 installed on the extrusion frame 25 and with the feed port 13 connected to the discharge port below the box body 11, an extrusion stirring shaft 22 rotatably connected to the extrusion box 21 and in a spiral shape, and an extrusion motor 23 installed on the extrusion frame 25 and connected to the extrusion stirring shaft 22 through a gear assembly 24.

[0021] The briquetting machine 3 includes a briquetting frame 31, a feed pipe 32 connected to the discharge port on the extrusion box 21 and with its lower end mounted on the briquetting frame 31, a reduction scale 315 provided on the feed pipe 32, a feed mechanism provided below the briquetting frame 31, a forming bowl 33, and a pressing section. The feed mechanism drives the forming bowl 33 from below the feed pipe 32 to below the pressing section. The pressing head of the pressing section moves downward to compact the material in the forming bowl 33, which is then picked up by a robot and transferred to the kiln feeding process. The pressing section includes a hydraulic press 34 mounted on the briquetting frame 31 and an upper pressing head 35 mounted on the lower end of the telescopic rod of the hydraulic press 34. The feeding mechanism includes a feeding frame 36, a base 37 mounted on the feeding frame 36, a rotating table 38 rotatably connected to the base 37, a rotating motor 310 driving the rotating table 38 to rotate, a worm gear assembly and a pulley assembly 311 mounted on the base 37 for transmission, the rotating motor 310 drives the pulley assembly 311 to move, and then drives the worm gear to move, and finally drives the rotating table to rotate, and delivers the unpressed formed bowl box 33 to the bottom of the upper pressing head 35, and at the same time delivers The pressed forming bowl box 33 is produced. The lower pressing head includes a lifting cylinder 312 fixed to the feeding frame, a fixing rod 313 distributed around the lifting cylinder 312 and fixed to the feeding frame 36, and a lower pressing plate 314 sleeved on the fixing rod 313. The upper end of the lifting cylinder 312 can rise below the lower pressing plate 314 and lift the lower pressing plate 314 to the bottom of the rotating table 38, so that the lower pressing plate 314 and the lower end surface of the rotating table 38 are in contact with each other to cooperate with the upper pressing head 35 to complete the pressing. The worm gear assembly includes a worm wheel fixedly connected to the rotating table 38 and coaxially arranged, and a worm 30 rotatably connected to the base 37 and meshing with the worm wheel. The pulley assembly is connected between the worm 30 and the output shaft of the rotating motor 310.

[0022] The positive and negative pressure integrated air pump 4 and the air intake and exhaust fan 12 degas the material sent to the box body 11 by the high-speed mixer in time, reducing the degree of contact between the material and the external environment, avoiding moisture absorption after the front end of the sodium positive electrode material comes into contact with the air before entering the furnace, and inhibiting the segregation of elements; the material is preliminarily compacted by the extrusion of the unloading stirring shaft 18, the pores of the material are reduced, and the compactness of the raw materials before entering the furnace for sintering is increased. The scraper 110 scrapes off the material on the inner wall of the box body 11 in time to prevent material accumulation; the briquetting machine further increases the weight of the bowl, ensuring that the chemical properties of the ternary material are not lost; the pores of the raw materials are reduced, the compactness of the raw materials before entering the furnace for sintering is increased, and the production capacity is greatly improved. There is no powder spraying and powder running during the whole process, which reduces the use of dust removal equipment and greatly reduces the production cost (the high-speed mixer, manipulator and kiln are not the focus of the application and will not be described here).

[0023] The above embodiments are intended only to illustrate the technical concepts and features of the present invention. Their purpose is to enable those familiar with the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications based on the spirit of the present invention are intended to be included in the scope of protection of the present invention.

Claims

1. An automatic loading system for sodium ion battery cathode materials, comprising a conical mixer, an extruder located downstream of the conical mixer, and a briquetting machine located downstream of the extruder, characterized in that: The automatic bowl filling system also includes a positive and negative pressure integrated air pump, the conical mixer includes an inverted conical box, one end of which is connected to the box and is used to extract gas from or introduce gas into the box, and the positive and negative pressure integrated air pump is connected to the other end of the air intake and exhaust fan.

2. The automatic loading system for sodium ion battery positive electrode materials according to claim 1, characterized in that: The upper end cover of the box body is provided with a feed port and an air inlet and an air outlet. The air intake and exhaust fan includes a first mounting plate covered on the air inlet and outlet, and a guide cylinder whose upper end is fixed to the lower end surface of the first mounting plate and passes through the air inlet and outlet. The air intake and exhaust fan is installed on the first mounting plate. The air intake and exhaust fan and the positive and negative pressure integrated air pump can extract air from or blow air into the box body when operating separately or synchronously. The exhaust speed is faster when exhausting air outwards synchronously, and the blowing speed is faster when blowing air inwards synchronously.

3. The automatic loading system for sodium ion battery positive electrode materials according to claim 2, characterized in that: The outer side wall of the guide cylinder is sealed with the inner side wall of the air inlet and outlet.

4. The automatic loading system for sodium ion battery positive electrode materials according to claim 2, characterized in that: The conical mixer comprises a mixing motor arranged on the upper end cover of the box body, and a spiral feeding stirring shaft arranged in the box body and drivingly connected to the output shaft of the mixing motor.

5. The automatic loading system for sodium ion battery positive electrode materials according to claim 4, characterized in that: The unloading stirring shaft is provided with a scraping mechanism for promptly scraping off the material accumulated on the inner wall of the box body. The scraping mechanism includes a fixed ring fixedly mounted on the stirring shaft, a support rod whose proximal end is fixed to the fixed ring and extends radially along the box body, and a scraper fixed to the distal end of the support rod and extending along the inclined side wall of the box body. When the unloading stirring shaft rotates, the scraper adheres to the inner wall of the box body and rotates around the unloading stirring shaft.

6. The automatic loading system for sodium ion battery positive electrode materials according to claim 1, characterized in that: The extruder includes an extrusion frame, an extrusion box installed on the extrusion frame and having a feed port connected to a discharge port below the box body, a spiral extrusion stirring shaft rotatably connected to the extrusion box, and an extrusion motor installed on the extrusion frame and used to drive the extrusion stirring shaft.

7. The automatic loading system for sodium ion battery positive electrode materials according to claim 6, characterized in that: The briquetting machine includes a briquetting machine frame, a feeding pipe connected to the discharge port on the extrusion box and with the lower end mounted on the briquetting machine frame, a reduction scale provided on the feeding pipe, a feeding mechanism provided below the briquetting machine frame, a forming bowl box, and a pressing part. The feeding mechanism drives the forming bowl box to move from under the feeding pipe to under the pressing part. After the pressure head of the pressing part moves downward, it compacts the material in the forming bowl box, and then the material is taken away by a robot and transferred to the kiln feeding procedure.

8. The automatic loading system for sodium ion battery positive electrode materials according to claim 7, characterized in that: The pressing part includes a hydraulic press installed on the briquetting machine frame, an upper pressing head installed on the lower end of the telescopic rod of the hydraulic press, and a lower pressing head arranged below the feeding mechanism and below the upper pressing head.

9. The automatic loading system for sodium ion battery positive electrode materials according to claim 8, characterized in that: The feeding mechanism includes a feeding frame, a base installed on the feeding frame, a rotary table rotatably connected to the base, a rotating motor driving the rotary table to rotate, a worm gear assembly and a pulley assembly installed on the base for transmission, the rotating motor drives the pulley assembly to move, and then drives the worm gear to move, and finally drives the rotary table to rotate, the lower pressing head includes a lifting cylinder fixed on the feeding frame, a fixing rod distributed around the lifting cylinder and fixed on the feeding frame, and a lower pressing plate sleeved on the fixing rod, the upper end portion of the jacking cylinder can rise to the bottom of the lower pressing plate and lift the lower pressing plate to the bottom of the rotary table, so that the lower pressing plate is in contact with the lower end surface of the rotary table for cooperating with the upper pressing head to complete the pressing.

10. The automatic loading system for sodium ion battery positive electrode materials according to claim 9, characterized in that: The worm gear assembly includes a worm wheel fixedly connected to the rotating table and coaxially arranged, and a worm rotatably connected to the base and meshing with the worm wheel. The pulley assembly is connected between the worm and the output shaft of the rotating motor.

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