Powder cooling device and lithium battery processing equipment

Abstract

The utility model discloses a powder cooling device and lithium battery processing equipment, the powder cooling device comprises an upper scattering cone cylinder assembly with a feed port and a bottom gathering funnel assembly with a discharge port, the upper scattering cone cylinder assembly is a water-cooled cone cylinder assembly and is provided with an upper conical scattering surface, and the bottom gathering funnel assembly is provided with a lower conical scattering surface. The bottom gathering funnel assembly is a water-cooled funnel cooling assembly and is provided with a bottom funnel gathering surface, the upper conical dispersion surface and the bottom funnel gathering surface form a folded cooling channel, and high-temperature lithium battery negative electrode powder can enter the cooling channel from the feeding port and flow out of the cooling channel from the discharging port; the high-temperature lithium battery negative electrode powder is cooled in the process of passing through the cooling channel; the lithium battery processing equipment comprises the powder cooling device. According to the powder cooling device and the lithium battery processing equipment, the cooling efficiency can be improved, the occupied space volume is reduced, the energy consumption is reduced, and the production benefits of enterprises can be improved during practical application.

Description

Technical Field

[0001] The utility model relates to the field of lithium battery production, in particular to a powder cooling device and lithium battery processing equipment. Background Art

[0002] In the field of lithium battery production, lithium battery negative electrode materials need to be heated at high temperatures multiple times during the production process. After each heating, they need to be cooled. Lithium battery negative electrode materials are easily oxidized by air at high temperatures, so they can only be cooled using partition cooling devices. The mainstream lithium battery negative electrode material powders on the market are cooled using horizontal cooling kilns similar to rotary kilns, such as Figure 1 shown.

[0003] However, the negative electrode material powder is generally porous and contains a large amount of static gas inside. It has low thermal conductivity and is in a loose state with a certain degree of fluidity. It is easy to deposit at the bottom of the cooling kiln and has difficulty in fully contacting the cooling surface. The effective heat exchange area is small, resulting in a large cooling kiln size and low operating efficiency.

[0004] Reference Figure 1 An analysis of the structure and operating principles of horizontal cooling kilns reveals the low cooling efficiency. Lithium-ion battery anode material powders possess both solid and fluid properties, and are subject to both gravity and viscous forces. Similar to, but different from, liquids, the flow of powder within the kiln is primarily driven by gravity, not pressure differentials. Furthermore, due to operational stability requirements, the kiln's filling rate must be kept low, typically below 20%. This results in the high-temperature powder being confined to a small area at the bottom of the kiln, leaving minimal contact with the cooling wall, leading to low cooling efficiency.

[0005] Taking a step back, even if lower temperature chilled water is used in conjunction with a horizontal cooling kiln to cool high-temperature powders, the discharge temperature can be reduced to a temperature that can be used for subsequent processes. However, the production of chilled water requires a refrigeration system, which has high construction costs and consumes a large amount of electricity during operation, resulting in serious energy waste.

[0006] Therefore, the purpose of this utility model is to provide a new technical solution to solve the existing technical problems. Utility Model Content

[0007] In order to overcome the deficiencies of the prior art, the utility model provides a powder cooling device and lithium battery processing equipment, which effectively solve the technical defects of the prior art such as large space occupation, low cooling efficiency, and serious energy waste.

[0008] The technical solution adopted by the utility model to solve its technical problems is:

[0009] A powder cooling device comprises an upper dispersing cone assembly with a feed port and a bottom gathering funnel assembly with a discharge port, wherein the upper dispersing cone assembly is a water-cooled cone assembly and has an upper conical dispersing surface, and the bottom gathering funnel assembly is a water-cooled funnel cooling assembly and has a bottom funnel gathering surface, wherein the upper conical dispersing surface and the bottom funnel gathering surface form a folded cooling channel, and high-temperature lithium battery negative electrode powder can enter the cooling channel from the feed port and flow out of the cooling channel from the discharge port, and the high-temperature lithium battery negative electrode powder is cooled in the process of passing through the cooling channel.

[0010] As a further improvement of the above technical solution, the upper dispersion cone assembly includes an upper cooling cone outer cylinder and an upper cooling cone inner cylinder located inside the upper cooling cone outer cylinder and fixed to the upper cooling cone outer cylinder, the feed port is arranged at the upper inlet of the upper cooling cone outer cylinder, the upper cooling cone outer cylinder has an upper inner conical cooling surface, the outer surface of the upper cooling cone inner cylinder has the upper conical dispersion surface, the space between the upper conical dispersion surface and the upper inner conical cooling surface is used to pass the high-temperature lithium battery negative electrode powder that needs to be cooled and serves as a component of the cooling channel and is used to pass the lithium battery negative electrode powder.

[0011] As a further improvement of the above technical solution, the cooling channel formed between the upper inner conical cooling surface and the upper conical dispersion surface gradually narrows from top to bottom.

[0012] As a further improvement of the above technical solution, the upper cooling cone outer tube and the upper cooling cone inner tube are both hollow cylinders, the hollow space of the upper cooling cone outer tube and the hollow space of the upper cooling cone inner tube are connected by at least two upper cooling cone inner and outer tube connecting tubes, and the side of the upper cooling cone outer tube is provided with an upper cooling water inlet pipe and an upper cooling water outlet pipe connected to the hollow space of the upper cooling cone outer tube.

[0013] As a further improvement of the above technical solution, the bottom gathering funnel assembly includes a bottom cooling funnel cylinder, the discharge port is arranged at the bottom outlet of the bottom cooling funnel cylinder, the bottom cooling funnel cylinder has the bottom funnel gathering surface, and the surface space of the bottom funnel gathering surface is a component of the cooling channel and is used to pass the lithium battery negative electrode powder.

[0014] As a further improvement of the above technical solution, the bottom cooling funnel tube is a hollow cylinder, and a bottom cooling water inlet pipe and a bottom cooling water outlet pipe are provided on the side of the bottom cooling funnel tube. The bottom cooling water inlet pipe and the bottom cooling water outlet pipe are both connected to the hollow space of the bottom cooling funnel tube.

[0015] As a further improvement of the above technical solution, at least one intermediate gathering and dispersing module is arranged between the upper dispersing cone assembly and the bottom gathering funnel assembly, and the intermediate gathering and dispersing module includes an intermediate gathering funnel assembly and an intermediate dispersing cone assembly. The intermediate gathering funnel assembly is a water-cooled funnel cooling assembly and has an intermediate funnel gathering surface. The intermediate dispersing cone assembly is a water-cooled cone assembly and has an intermediate conical dispersing surface. The intermediate funnel gathering surface and the intermediate conical dispersing surface are folded back and serve as the middle part of the cooling channel.

[0016] As a further improvement of the above technical solution, the intermediate gathering funnel assembly includes an intermediate jacket outer cylinder and an intermediate cooling funnel inner cylinder fixedly arranged inside the intermediate jacket outer cylinder, the intermediate cooling funnel inner cylinder has the intermediate funnel gathering surface, and the surface space of the intermediate funnel gathering surface serves as a component of the cooling channel and is used to pass the lithium battery negative electrode powder.

[0017] As a further improvement of the above technical solution, the intermediate jacket outer tube and the intermediate cooling funnel inner tube are both hollow cylinders, the intermediate jacket outer tube has a jacket inner cavity, the intermediate cooling funnel inner tube has a hollow space, and at least two connecting ports are provided between the intermediate jacket outer tube and the intermediate cooling funnel inner tube, and the connecting ports connect the jacket inner cavity of the intermediate jacket outer tube with the hollow space of the intermediate cooling funnel inner tube, and the outer wall of the intermediate jacket outer tube is provided with an intermediate funnel cooling water inlet pipe and an intermediate funnel cooling water outlet pipe, and the intermediate funnel cooling water inlet pipe and the intermediate funnel cooling water outlet pipe are both connected to the jacket inner cavity of the intermediate jacket outer tube.

[0018] As a further improvement of the above technical solution, the intermediate dispersion cone assembly includes an intermediate cooling cone inner cylinder, the outer surface of the intermediate cooling cone inner cylinder is the intermediate conical dispersion surface, and the intermediate conical dispersion surface is a component of the cooling channel and is used to pass high-temperature lithium battery negative electrode powder.

[0019] As a further improvement of the above technical solution, the intermediate cooling cone inner cylinder is a hollow cylinder, and the intermediate cooling cone inner cylinder is connected to an intermediate cone cooling water inlet pipe and an intermediate cone cooling water outlet pipe. The intermediate cone cooling water inlet pipe and the intermediate cone cooling water outlet pipe are both connected to the hollow space of the intermediate cooling cone inner cylinder.

[0020] As a further improvement of the above technical solution, the internal outlet of the intermediate cone cooling water inlet pipe is arranged at the top of the hollow space of the intermediate cooling cone inner cylinder.

[0021] As a further improvement of the above technical solution, the bottom of the interior of the intermediate gathering funnel assembly has an opening, the top of the intermediate dispersion cone assembly extends upward through the bottom opening of the intermediate gathering funnel assembly, and the top of the intermediate gathering funnel assembly is higher than the bottom opening of the intermediate gathering funnel assembly in the vertical direction.

[0022] As a further improvement of the above technical solution, a nitrogen purge device is provided at the discharge port, and the nitrogen purge device includes a plurality of nitrogen purge pipes uniformly arranged circumferentially.

[0023] As a further improvement of the above technical solution, the upper dispersion cone assembly, the middle gathering funnel assembly, the middle dispersion cone assembly and the bottom gathering funnel assembly are a combined water-cooled circulation cooling device connected in series;

[0024] Alternatively, the upper dispersing cone assembly, the middle gathering funnel assembly, the middle dispersing cone assembly and the bottom gathering funnel assembly are cooling devices that independently provide water cooling circulation.

[0025] The utility model also provides:

[0026] A lithium battery processing device comprises the powder cooling device.

[0027] The utility model also provides:

[0028] A lithium battery negative electrode powder cooling process, the lithium battery negative electrode powder cooling process forms a cooling channel for passing high-temperature lithium battery negative electrode powder through the upper conical dispersing surface of the upper dispersing cone cylinder assembly and the bottom funnel gathering surface of the bottom gathering funnel assembly. In the process of the high-temperature lithium battery negative electrode powder passing through the cooling channel along the upper conical dispersing surface and the bottom funnel gathering surface, the upper conical dispersing surface and the bottom funnel gathering surface respectively disperse and gather the lithium battery negative electrode powder; at the same time, a water cooling circulation is provided for the upper dispersing cone cylinder assembly and the bottom gathering funnel assembly, and the high-temperature lithium battery negative electrode powder is cooled by using the upper conical dispersing surface of the upper dispersing cone cylinder assembly and the bottom funnel gathering surface of the bottom gathering funnel assembly.

[0029] The beneficial effects of the present invention are as follows: the present invention provides a powder cooling device and lithium battery processing equipment, wherein the powder cooling device and lithium battery processing equipment form a folded cooling channel through the upper conical dispersion surface of the upper dispersion cone assembly and the bottom funnel gathering surface of the bottom gathering funnel assembly, and cool the high-temperature lithium battery negative electrode powder through the cooling channel. In combination with the water cooling circulation function of the cooling cone, the cooling efficiency of the high-temperature lithium battery negative electrode powder can be greatly improved, the cooling device occupies less space, and can also reduce the demand for chilled water, thereby reducing energy waste. Specifically, the advantages of the present technical solution include:

[0030] 1. The flow of high-temperature lithium battery negative electrode powder in the cooling device relies on gravity and does not require additional power drive, which can save energy;

[0031] 2. The high-temperature lithium battery negative electrode powder is in full contact with the upper conical dispersion surface of the upper dispersion cone assembly and the bottom funnel gathering surface of the bottom gathering funnel assembly, which can improve the heat exchange efficiency. The powder accumulation thickness is small, the thermal resistance is small, and the heat exchange efficiency is high.

[0032] 3. The high-temperature lithium battery negative electrode powder is turned back and forth many times in the cooling device. The low-temperature powder on the surface and the high-temperature powder in the center are mixed with each other. The heat conduction heat transfer in the powder is converted to convection heat transfer, the thermal resistance is further reduced, and the heat transfer efficiency is further improved.

[0033] In summary, this powder cooling device and lithium battery processing equipment effectively solve the technical defects of the existing technology, such as large space occupation, low cooling efficiency, and serious energy waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0035] Figure 1 It is a structural diagram of a horizontal cooling kiln in the prior art;

[0036] Figure 2 This is a schematic diagram of the assembly of the powder cooling device in Example 1 of the present utility model;

[0037] Figure 3 This is a cross-sectional view of the structure of the powder cooling device in Example 1 of the present utility model;

[0038] Figure 4 This is a schematic diagram of the flow of high-temperature lithium battery negative electrode powder in the channel when the powder cooling device in Example 1 of the present utility model is working;

[0039] Figure 5 This is a schematic diagram of the flow of cooling water when the powder cooling device in Example 1 of the present utility model is working;

[0040] Figure 6 This is a partial sectional axonometric view of the powder cooling device in Example 1 of the present invention. DETAILED DESCRIPTION

[0041] The following will clearly and completely describe the concept, specific structure and technical effects of the present invention in combination with the embodiments and drawings, so as to fully understand the purpose, characteristics and effects of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by technical personnel in this field without creative work are within the scope of protection of the present invention. In addition, all the connection / connection relationships involved in the patent do not refer to the direct connection of components, but refer to the formation of a better connection structure by adding or reducing connection accessories according to the specific implementation situation. The various technical features in the creation of the present utility model can be combined interactively without conflicting with each other, refer to Figure 2-6 .

[0042] Example 1: Specific reference Figure 2-6 ,

[0043] A powder cooling device comprises an upper dispersing cone assembly 1 having a feed port 51 and a bottom gathering funnel assembly 4 having a discharge port 52, wherein the upper dispersing cone assembly 1 is a water-cooled cone assembly and has an upper conical dispersing surface 121, and the bottom gathering funnel assembly 4 is a water-cooled funnel cooling assembly and has a bottom funnel gathering surface 411. The upper conical dispersing surface 121 and the bottom funnel gathering surface 411 form a folded cooling channel, and high-temperature lithium battery negative electrode powder can enter the cooling channel from the feed port 51 and flow out of the cooling channel from the discharge port 52, and the high-temperature lithium battery negative electrode powder is cooled in the process of passing through the cooling channel.

[0044] In this embodiment, an intermediate gathering and dispersion module is arranged between the upper dispersing cone assembly 1 and the bottom gathering funnel assembly 4. The intermediate gathering and dispersion module includes an intermediate gathering funnel assembly 2 and an intermediate dispersing cone assembly 3. The intermediate gathering funnel assembly 2 is a water-cooled funnel cooling assembly and has an intermediate funnel gathering surface 221. The intermediate dispersing cone assembly 3 is a water-cooled cone assembly and has an intermediate conical dispersing surface 311. The intermediate funnel gathering surface 221 and the intermediate conical dispersing surface 311 are folded back and serve as the middle part of the cooling channel.

[0045] In the present invention, the conical dispersing surface of the dispersing cone assembly and the funnel gathering surface of the gathering funnel assembly are connected in sequence from top to bottom and folded back and forth, so that the cooling channel formed is roughly in a repeated Z-shape in cross section. It should be noted that the connection between adjacent conical dispersing surfaces and funnel gathering surfaces is not a contact connection. It is only necessary to set a suitable distance according to needs so that the high-temperature lithium battery negative electrode powder can slide out from the lower outlet of the previous conical dispersing surface or funnel gathering surface and fall into the upper position of the next conical dispersing surface or funnel gathering surface. In addition, when specifically set, the taper of the conical dispersing surface or funnel gathering surface should be designed according to the angle of repose of the powder to ensure that the high-temperature lithium battery negative electrode powder can slide down by its own gravity on the conical dispersing surface or funnel gathering surface to avoid accumulation.

[0046] Reference Figure 3 、 Figure 4 In this embodiment, the upper dispersing cone assembly 1, the middle gathering funnel assembly 2, the middle dispersing cone assembly 3 and the bottom gathering funnel assembly 4 are connected in sequence from top to bottom and form a cylinder with a cooling inner cavity. The feed port 51 is arranged at the uppermost part of the cylinder, and the discharge port 52 is arranged at the bottommost position of the cylinder. The upper dispersing cone assembly 1, the middle gathering funnel assembly 2, the middle dispersing cone assembly 3 and the bottom gathering funnel assembly 4, the entire cylinder forms a vertical cooling device, which can save space.

[0047] In the above scheme, the upper dispersing cone assembly 1 includes an upper cooling cone outer cylinder 11 and an upper cooling cone inner cylinder 12 located inside the upper cooling cone outer cylinder 11 and fixed to the upper cooling cone outer cylinder 11. The feed port 51 is arranged at the upper entrance of the upper cooling cone outer cylinder 11. The upper cooling cone outer cylinder 11 has an upper inner conical cooling surface 111, and the upper cooling cone inner cylinder 12 has an upper conical dispersing surface 121. The space between the upper conical dispersing surface 121 and the upper inner conical cooling surface 111 is used to pass the high-temperature lithium battery negative electrode powder that needs to be cooled and serves as a component of the channel.

[0048] Reference Figure 4During use, high-temperature lithium battery negative electrode powder enters the cooling device from the feed port 51. Under the action of gravity, the high-temperature lithium battery negative electrode powder flows from top to bottom and from inside to outside along the upper conical dispersion surface 121 of the upper cooling cone inner cylinder 12. During this process, the high-temperature lithium battery negative electrode powder in contact with the wall of the upper conical dispersion surface 121 conducts heat transfer with the wall, and the outer layer of the high-temperature lithium battery negative electrode powder conducts heat exchange with the upper inner conical cooling surface 111 of the upper cooling cone outer cylinder 11. Heat transfer is carried out simultaneously through the upper conical dispersion surface 121 and the upper inner conical cooling surface 111, thereby improving cooling efficiency. Finally, the powder flows out of the lower edge of the upper conical dispersion surface 121 of the upper cooling cone inner cylinder 12 and enters the middle gathering funnel assembly 2.

[0049] In addition, in the above scheme, the cooling channel formed between the upper inner conical cooling surface 111 and the upper conical dispersion surface 121 gradually narrows from top to bottom. This structural setting can prevent the lithium battery negative electrode powder from piling up at the feed port 51, thereby improving the stability of the equipment.

[0050] In this embodiment, the upper cooling cone outer tube 11 and the upper cooling cone inner tube 12 are both hollow cylinders, and the hollow space of the upper cooling cone outer tube 11 and the hollow space of the upper cooling cone inner tube 12 are connected by at least two upper cooling cone inner and outer tube connecting pipes 13, wherein at least one upper cooling cone inner and outer tube connecting pipe 13 is for cooling water to flow from the hollow space of the upper cooling cone outer tube 11 to the hollow space of the upper cooling cone inner tube 12, and at least one upper cooling cone inner and outer tube connecting pipe 13 is for cooling water to flow back from the hollow space of the upper cooling cone inner tube 12 to the hollow space of the upper cooling cone outer tube 11. An upper cooling water inlet pipe 14 and an upper cooling water outlet pipe 15 connected to the hollow space of the upper cooling cone outer tube 11 are provided on the side of the upper cooling cone outer tube 11.

[0051] Reference Figure 5 When the upper dispersion cone assembly 1 is cooling, cooling water enters the hollow space of the upper cooling cone outer cylinder 11 from the upper cooling water inlet pipe 14. The cooling water in the hollow space of the upper cooling cone outer cylinder 11 passes through at least one upper cooling cone inner and outer cylinder connecting pipe 13 and enters the hollow space of the upper cooling cone inner cylinder 12. The cooling water that has entered the hollow space of the upper cooling cone inner cylinder 12 flows back into the hollow space of the upper cooling cone outer cylinder 11 through at least one upper cooling cone inner and outer cylinder connecting pipe 13. The cooling water that has flowed back into the hollow space of the upper cooling cone outer cylinder 11 flows out through the upper cooling water outlet pipe 15. At this point, the water cooling cycle of the upper dispersion cone assembly 1 is completed. This water cooling cycle can remove the heat conducted by the upper conical dispersion surface 121 and the upper inner conical cooling surface 111 during operation, thereby improving cooling efficiency.

[0052] In some other embodiments, the upper cooling water inlet pipe 14 may also be configured to be directly connected to the internal space of the upper cooling cone inner cylinder 12, and the specific configuration may be selected according to needs.

[0053] In this embodiment, the intermediate gathering funnel assembly 2 includes an intermediate jacket outer cylinder 21 and an intermediate cooling funnel inner cylinder 22 fixedly arranged inside the intermediate jacket outer cylinder 21. The intermediate cooling funnel inner cylinder 22 has an intermediate funnel gathering surface 221. The surface space of the intermediate funnel gathering surface 221 is used to cool the high-temperature lithium battery negative electrode powder and serves as a component of the channel.

[0054] Reference Figure 4 During use, high-temperature lithium battery negative electrode powder enters the intermediate gathering funnel assembly 2 from the upper dispersion cone assembly 1 and falls onto the upper surface of the intermediate funnel gathering surface 221 of the intermediate cooling funnel inner cylinder 22. Under the action of gravity, the lithium battery negative electrode powder flows from top to bottom and from outside to inside along the intermediate funnel gathering surface 221 of the intermediate cooling funnel inner cylinder 22. During this process, the lithium battery negative electrode powder in contact with the wall of the intermediate funnel gathering surface 221 undergoes heat conduction and heat exchange with the wall. Finally, the powder flows out of the lower edge of the intermediate funnel gathering surface 221 of the intermediate cooling funnel inner cylinder 22 and enters the intermediate dispersion cone assembly 3.

[0055] In this embodiment, the intermediate jacket outer cylinder 21 and the intermediate cooling funnel inner cylinder 22 are both hollow cylinders. The intermediate jacket outer cylinder 21 has a jacket inner cavity, and the intermediate cooling funnel inner cylinder 22 has a hollow space. At least two communication ports 23 are provided between the intermediate jacket outer cylinder 21 and the intermediate cooling funnel inner cylinder 22, at least one of which is for cooling water to flow from the jacket cavity of the intermediate jacket outer cylinder 21 into the hollow space of the intermediate cooling funnel inner cylinder 22, and at least one communication port 23 is for cooling water to flow from the jacket cavity of the intermediate jacket outer cylinder 21 into the hollow space of the intermediate cooling funnel inner cylinder 22. The cooling water flows back from the hollow space of the intermediate cooling funnel inner tube 22 to the jacket inner cavity of the intermediate jacket outer tube 21. The connecting port 23 connects the jacket inner cavity of the intermediate jacket outer tube 21 with the hollow space of the intermediate cooling funnel inner tube 22. The outer wall of the intermediate jacket outer tube 21 is provided with an intermediate funnel cooling water inlet pipe 24 and an intermediate funnel cooling water outlet pipe 25. The intermediate funnel cooling water inlet pipe 24 and the intermediate funnel cooling water outlet pipe 25 are both connected to the jacket inner cavity of the intermediate jacket outer tube 21.

[0056] Reference Figure 5When the intermediate gathering funnel assembly 2 is cooling, cooling water enters the jacket cavity of the intermediate jacket outer tube 21 through the intermediate funnel cooling water inlet pipe 24. The cooling water in the jacket cavity of the intermediate jacket outer tube 21 enters the hollow space of the intermediate cooling funnel inner tube 22 through at least one connecting port 23. The cooling water entering the hollow space of the intermediate cooling funnel inner tube 22 flows back into the jacket cavity of the intermediate jacket outer tube 21 through at least one connecting port 23. The cooling water that has returned to the jacket cavity of the intermediate jacket outer tube 21 flows out through the intermediate funnel cooling water outlet pipe 25. This completes the water cooling cycle of the intermediate gathering funnel assembly 2. This water cooling cycle removes heat conducted from the central intermediate funnel gathering surface 221 during operation, improving cooling efficiency.

[0057] In another embodiment, the intermediate funnel cooling water inlet pipe 24 may also be configured to be directly connected to the internal space of the intermediate cooling funnel inner tube 22 , and the specific configuration may be selected according to needs.

[0058] Reference Figure 3-5 In this embodiment, the intermediate dispersion cone assembly 3 includes an intermediate cooling cone inner cylinder 31, the outer surface of the intermediate cooling cone inner cylinder 31 is the intermediate conical dispersion surface 311, and the intermediate conical dispersion surface 311 is a component of the cooling channel and is used to pass high-temperature lithium battery negative electrode powder.

[0059] During use, after the high-temperature lithium battery negative electrode powder enters the intermediate dispersion cone assembly 3 from the intermediate gathering funnel assembly 2, the lithium battery negative electrode powder falls onto the upper surface of the intermediate conical dispersion surface 311 of the intermediate cooling cone inner cylinder 31. Under the action of gravity, the lithium battery negative electrode powder disperses and flows from top to bottom and from inside to outside along the intermediate conical dispersion surface 311 of the intermediate cooling cone inner cylinder 31. During this process, the lithium battery negative electrode powder in contact with the wall of the intermediate conical dispersion surface 311 conducts heat conduction and heat exchange with the wall. Finally, the powder flows out of the lower edge of the intermediate conical dispersion surface 311 of the intermediate cooling cone inner cylinder 31 and enters the bottom gathering funnel assembly 4.

[0060] Preferably, the intermediate cooling cone inner cylinder 31 is a hollow cylinder, and the intermediate cooling cone inner cylinder 31 is connected to an intermediate cone cooling water inlet pipe 32 and an intermediate cone cooling water outlet pipe 33, and the intermediate cone cooling water inlet pipe 32 and the intermediate cone cooling water outlet pipe 33 are both connected to the hollow space of the intermediate cooling cone inner cylinder 31.

[0061] Reference Figure 5When the intermediate dispersion cone assembly 3 is water-cooled, the external cooling water flows into the intermediate cooling cone inner cylinder 31 which is a hollow cylinder through the intermediate cone cooling water inlet pipe 32. The cooling water entering the intermediate cooling cone inner cylinder 31 which is a hollow cylinder absorbs heat and finally flows out from the intermediate cone cooling water outlet pipe 33, completing the water cooling cycle of the intermediate dispersion cone assembly 3.

[0062] In this embodiment, the internal outlet of the intermediate cone cooling water inlet pipe 32 is located at the top of the hollow space of the intermediate cooling cone inner tube 31. In actual use, liquid entering the inner cavity of the intermediate cooling cone inner tube 31 will flow downward along the inner wall along the top, improving heat dissipation efficiency. Simultaneously, the inlet of the intermediate cone cooling water outlet pipe 33 is located near the bottom of the hollow space of the intermediate cooling cone inner tube 31.

[0063] Furthermore, in this embodiment, the bottom of the intermediate gathering funnel assembly 2 has an opening, and the top of the intermediate dispersion cone assembly 3 extends upward through the bottom opening of the intermediate gathering funnel assembly 2. The top of the intermediate gathering funnel assembly 2 is vertically higher than the bottom opening of the intermediate gathering funnel assembly 2. This structural setting can prevent lithium battery negative electrode powder from piling up in the intermediate gathering funnel assembly 2 and the intermediate dispersion cone assembly 3, thereby improving the reliability and stability of the equipment.

[0064] Reference Figure 3-5 In this embodiment, the bottom gathering funnel assembly 4 includes a bottom cooling funnel tube 41, the discharge port 52 is arranged at the bottom outlet of the bottom cooling funnel tube 41, and the bottom cooling funnel tube 41 has the bottom funnel gathering surface 411. The surface space of the bottom funnel gathering surface 411 is a component of the cooling channel and is used to pass the lithium battery negative electrode powder.

[0065] During application, after the high-temperature lithium battery negative electrode powder enters the middle bottom gathering funnel assembly 4 from the middle dispersion cone assembly 3, the lithium battery negative electrode powder falls on the upper surface of the bottom funnel gathering surface 411 of the bottom cooling funnel tube 41. Under the action of gravity, the lithium battery negative electrode powder flows from top to bottom and from outside to inside along the bottom funnel gathering surface 411 of the bottom cooling funnel tube 41. In this process, the lithium battery negative electrode powder in contact with the wall of the bottom funnel gathering surface 411 conducts heat conduction and heat exchange with the wall. Finally, the powder flows out of the lower edge of the bottom funnel gathering surface 411 of the bottom cooling funnel tube 41 and enters the discharge port 52 and flows out of the entire cooling device through the discharge port, completing the cooling work.

[0066] Furthermore, the bottom cooling funnel tube 41 is a hollow cylinder, and a bottom cooling water inlet pipe and a bottom cooling water outlet pipe 43 are provided on the side of the bottom cooling funnel tube 41. The bottom cooling water inlet pipe and the bottom cooling water outlet pipe 43 are both connected to the hollow space of the bottom cooling funnel tube 41.

[0067] When the bottom gathering funnel assembly 4 is water-cooled, the cooling water flows into the bottom cooling water outlet pipe 43 which is a hollow cylinder through the bottom cooling water inlet pipe. The cooling water in the hollow cylinder of the bottom cooling funnel cylinder 41 absorbs heat and finally flows out from the bottom cooling water outlet pipe 43, completing the water cooling circulation work of the bottom gathering funnel assembly 4.

[0068] In this embodiment, the bottom cooling water inlet pipe is directly connected to the cavity of the intermediate cooling cone inner cylinder 31, and the bottom cooling water inlet pipe and the intermediate cone cooling water outlet pipe 33 are integrated. This is because the temperature of the lithium battery negative electrode powder has dropped to a certain extent after entering the intermediate dispersion cone assembly 3 and the bottom gathering funnel assembly 4. At this time, the temperature of the cooling water flowing out of the intermediate cone cooling water outlet pipe 33 is not high, which meets the cooling requirements of the bottom gathering funnel assembly 4, thereby saving cooling costs.

[0069] In this embodiment, in the upper dispersion cone assembly 1, since the temperature of the lithium battery negative electrode powder is the highest, the high-temperature powder is cooled simultaneously on both sides of the upper inner conical cooling surface 111 and the upper conical dispersion surface 121. The upper cooling cone outer cylinder 11 and the upper cooling cone inner cylinder 12 corresponding to the upper inner conical cooling surface 111 and the upper conical dispersion surface 121 both have cooling cavities, that is, in the upper dispersion cone assembly 1, the powder is cooled by two cooling cavities on both sides, which can greatly improve the cooling efficiency; when the lithium battery negative electrode powder enters the middle gathering funnel assembly 2 and the middle dispersion cone assembly 3, the powder is cooled on one side by a cooling cavity with a larger volume; when the lithium battery negative electrode powder enters the bottom gathering funnel assembly 4, it is cooled on one side by a cooling cavity with a smaller volume. This is because the temperature of the powder gradually decreases during the flow from top to bottom, and the cooling cavity becomes smaller to meet the cooling requirements. Of course, the size of the cooling cavity can be set according to actual needs.

[0070] In this embodiment, a nitrogen purge device 6 is provided at the discharge port 52. The nitrogen purge device 6 includes a plurality of nitrogen purge pipes evenly arranged circumferentially. A high-speed nitrogen flow can be sprayed upward through the nitrogen purge pipes at regular intervals to prevent the lithium battery negative electrode powder from accumulating in the cooling device and causing blockage.

[0071] In this embodiment, the upper dispersion cone assembly 1, the middle gathering funnel assembly 2, the middle dispersion cone assembly 3 and the bottom gathering funnel assembly 4 are a combined water-cooled cycle cooling device connected in series; Figure 5The middle cone cooling water inlet pipe 32 is connected to an external cooling water source, the bottom cooling water outlet pipe 43 is connected to the middle funnel cooling water inlet pipe 24 via a first pipe 71, and the middle funnel cooling water outlet pipe 25 is connected to the upper cooling water inlet pipe 14 via a second pipe 72. Thus, cooling water flows from the middle cone cooling water inlet pipe 32 into the middle dispersion cone assembly 3, then flows into the bottom convergence funnel assembly 4 through the middle cone cooling water outlet pipe 33. The cooling water in the bottom convergence funnel assembly 4 then enters the middle convergence funnel assembly 2 through the bottom cooling water outlet pipe 43, the first pipe 71, and the middle cooling water inlet 24. Furthermore, the cooling water enters the upper dispersion cone assembly 1 through the middle funnel cooling water outlet pipe 25, the second pipe 72, and the upper cooling water inlet pipe 14. Finally, the cooling water in the upper cooling cone 1 flows out through the upper cooling water outlet pipe 15.

[0072] In other embodiments, the upper dispersing cone assembly 1, the middle gathering funnel assembly 2, the middle dispersing cone assembly 3 and the bottom gathering funnel assembly 4 are cooling devices that independently provide water cooling circulation.

[0073] Based on the above powder cooling device, the utility model also provides:

[0074] A lithium battery processing device comprises the powder cooling device.

[0075] The utility model also provides:

[0076] A lithium battery negative electrode powder cooling process, the lithium battery negative electrode powder cooling process forms a cooling channel for passing high-temperature lithium battery negative electrode powder through the upper conical dispersing surface of the upper dispersing cone cylinder assembly and the bottom funnel gathering surface of the bottom gathering funnel assembly. In the process of the high-temperature lithium battery negative electrode powder passing through the cooling channel along the upper conical dispersing surface and the bottom funnel gathering surface, the upper conical dispersing surface and the bottom funnel gathering surface respectively disperse and gather the lithium battery negative electrode powder; at the same time, a water cooling circulation is provided for the upper dispersing cone cylinder assembly and the bottom gathering funnel assembly, and the high-temperature lithium battery negative electrode powder is cooled by using the upper conical dispersing surface of the upper dispersing cone cylinder assembly and the bottom funnel gathering surface of the bottom gathering funnel assembly.

[0077] Example 2: This example is basically the same as the example, with the difference being that, in this example, no intermediate gathering and dispersing module is provided between the upper dispersing cone assembly 1 and the bottom gathering funnel assembly 4, that is, the bottom of the upper dispersing cone assembly 1 is connected to the upper part of the bottom gathering funnel assembly 4. The specific structure of the upper dispersing cone assembly 1 and the bottom gathering funnel assembly 4 is the same as that in Example 1. In this example, the high-temperature lithium battery negative electrode powder passes through the upper dispersing cone assembly 1 and the bottom gathering funnel assembly 4 in sequence and then flows out directly. The specific solution provided in this example can be used for applications where cooling requirements are not high and temperature reduction is not high. The specific implementer can make judgments based on needs and select it if it meets the use requirements.

[0078] Example 3: This example is basically the same as the example, and the difference is that, in this example, a plurality of intermediate gathering and dispersing modules are provided between the upper dispersing cone assembly 1 and the bottom gathering funnel assembly 4, wherein the plurality of intermediate gathering and dispersing modules are connected up and down. The specific structures of the upper dispersing cone assembly 1, the bottom gathering funnel assembly 4 and the intermediate gathering and dispersing modules are the same as the specific structures of Example 1. During application, after the powder enters the upper dispersing cone assembly 1 through the feed port 51, the powder passes through the cooling operations of the plurality of intermediate gathering and dispersing modules in turn, and finally the powder enters the bottom gathering funnel assembly 4 and flows out through the discharge port 52. This example is suitable for situations where high cooling requirements are required, and the specific implementer can make judgments based on the specific needs and select it if it meets the requirements.

[0079] The above is a specific description of the preferred implementation of the present invention, but the invention of the present invention is not limited to the embodiments. Those skilled in the art can make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A powder cooling device, characterized in that: The invention comprises an upper dispersing cone assembly (1) having a feed port (51) and a bottom gathering funnel assembly (4) having a discharge port (52), wherein the upper dispersing cone assembly (1) is a water-cooled cone assembly and has an upper conical dispersing surface (121), and the bottom gathering funnel assembly (4) is a water-cooled funnel cooling assembly and has a bottom funnel gathering surface (411). The upper conical dispersing surface (121) and the bottom funnel gathering surface (411) form a folded cooling channel, and high-temperature lithium battery negative electrode powder can enter the cooling channel from the feed port (51) and flow out of the cooling channel from the discharge port (52), and the high-temperature lithium battery negative electrode powder is cooled in the process of passing through the cooling channel.

2. A powder cooling device according to claim 1, characterized in that: The upper dispersion cone assembly (1) comprises an upper cooling cone outer cylinder (11) and an upper cooling cone inner cylinder (12) located inside the upper cooling cone outer cylinder (11) and fixed to the upper cooling cone outer cylinder (11); the feed port (51) is arranged at the upper entrance of the upper cooling cone outer cylinder (11); the upper cooling cone outer cylinder (11) has an upper inner conical cooling surface (111); the outer surface of the upper cooling cone inner cylinder (12) has an upper conical dispersion surface (121); the space between the upper conical dispersion surface (121) and the upper inner conical cooling surface (111) is used for passing high-temperature lithium battery negative electrode powder that needs to be cooled and serves as a component of the cooling channel and is used for passing lithium battery negative electrode powder.

3. A powder cooling device according to claim 2, characterized in that: The cooling channel formed between the upper inner conical cooling surface (111) and the upper conical dispersion surface (121) gradually narrows from top to bottom.

4. The powder cooling device according to claim 2, characterized in that: The upper cooling cone outer tube (11) and the upper cooling cone inner tube (12) are both hollow cylinders. The hollow space of the upper cooling cone outer tube (11) and the hollow space of the upper cooling cone inner tube (12) are connected through at least two upper cooling cone inner and outer tube connecting tubes (13). An upper cooling water inlet pipe (14) and an upper cooling water outlet pipe (15) connected to the hollow space of the upper cooling cone outer tube (11) are provided on the side of the upper cooling cone outer tube (11).

5. The powder cooling device according to claim 1, characterized in that: The bottom gathering funnel assembly (4) comprises a bottom cooling funnel cylinder (41), the discharge port (52) is arranged at the bottom outlet of the bottom cooling funnel cylinder (41), the bottom cooling funnel cylinder (41) has a bottom funnel gathering surface (411), and the surface space of the bottom funnel gathering surface (411) is a component of the cooling channel and is used for passing lithium battery negative electrode powder.

6. The powder cooling device according to claim 5, characterized in that: The bottom cooling funnel tube (41) is a hollow cylinder. A bottom cooling water inlet pipe and a bottom cooling water outlet pipe (43) are provided on the side of the bottom cooling funnel tube (41). The bottom cooling water inlet pipe and the bottom cooling water outlet pipe (43) are both connected to the hollow space of the bottom cooling funnel tube (41).

7. The powder cooling device according to claim 1, characterized in that: At least one intermediate gathering and dispersing module is provided between the upper dispersing cone assembly (1) and the bottom gathering funnel assembly (4), the intermediate gathering and dispersing module comprising an intermediate gathering funnel assembly (2) and an intermediate dispersing cone assembly (3), the intermediate gathering funnel assembly (2) being a water-cooled funnel cooling assembly and having an intermediate funnel gathering surface (221), the intermediate dispersing cone assembly (3) being a water-cooled cone assembly and having an intermediate conical dispersing surface (311), the intermediate funnel gathering surface (221) and the intermediate conical dispersing surface (311) being folded back and serving as the intermediate portion of the cooling channel.

8. The powder cooling device according to claim 7, characterized in that: The intermediate gathering funnel assembly (2) comprises an intermediate jacket outer cylinder (21) and an intermediate cooling funnel inner cylinder (22) fixedly arranged inside the intermediate jacket outer cylinder (21); the intermediate cooling funnel inner cylinder (22) has the intermediate funnel gathering surface (221); the surface space of the intermediate funnel gathering surface (221) serves as a component of the cooling channel and is used for passing lithium battery negative electrode powder.

9. The powder cooling device according to claim 8, characterized in that: The intermediate jacket outer tube (21) and the intermediate cooling funnel inner tube (22) are both hollow cylinders. The intermediate jacket outer tube (21) has a jacket inner cavity, and the intermediate cooling funnel inner tube (22) has a hollow space. At least two connecting ports (23) are provided between the intermediate jacket outer tube (21) and the intermediate cooling funnel inner tube (22). The connecting ports (23) connect the jacket inner cavity of the intermediate jacket outer tube (21) with the hollow space of the intermediate cooling funnel inner tube (22). The outer wall of the intermediate jacket outer tube (21) is provided with an intermediate funnel cooling water inlet pipe (24) and an intermediate funnel cooling water outlet pipe (25). The intermediate funnel cooling water inlet pipe (24) and the intermediate funnel cooling water outlet pipe (25) are both connected with the jacket inner cavity of the intermediate jacket outer tube (21).

10. The powder cooling device according to claim 7, characterized in that: The intermediate dispersion cone assembly (3) comprises an intermediate cooling cone inner cylinder (31), the outer surface of the intermediate cooling cone inner cylinder (31) being the intermediate conical dispersion surface (311), the intermediate conical dispersion surface (311) being a component of the cooling channel and being used for passing high-temperature lithium battery negative electrode powder.

11. The powder cooling device according to claim 10, characterized in that: The intermediate cooling cone inner cylinder (31) is a hollow cylinder. The intermediate cooling cone inner cylinder (31) is connected to an intermediate cone cooling water inlet pipe (32) and an intermediate cone cooling water outlet pipe (33). Both the intermediate cone cooling water inlet pipe (32) and the intermediate cone cooling water outlet pipe (33) are in communication with the hollow space of the intermediate cooling cone inner cylinder (31).

12. The powder cooling device according to claim 11, characterized in that: The inner outlet of the intermediate cone cooling water inlet pipe (32) is arranged at the top of the hollow space of the intermediate cooling cone inner cylinder (31).

13. The powder cooling device according to claim 7, characterized in that: The bottom of the middle gathering funnel assembly (2) has an opening, the top of the middle dispersion cone assembly (3) extends upward through the bottom opening of the middle gathering funnel assembly (2), and the top of the middle gathering funnel assembly (2) is higher than the bottom opening of the middle gathering funnel assembly (2) in the vertical direction.

14. A powder cooling device according to any one of claims 1 to 13, characterized in that: A nitrogen purge device (6) is provided at the discharge port (52), and the nitrogen purge device (6) comprises a plurality of nitrogen purge pipes uniformly arranged in the circumferential direction.

15. The powder cooling device according to claim 1, characterized in that: The upper dispersion cone assembly (1), the middle gathering funnel assembly (2), the middle dispersion cone assembly (3) and the bottom gathering funnel assembly (4) are a combined water-cooled circulation cooling device connected in series; Alternatively, the upper dispersing cone assembly (1), the middle gathering funnel assembly (2), the middle dispersing cone assembly (3) and the bottom gathering funnel assembly (4) are cooling devices that independently provide water cooling circulation.

16. A lithium battery processing device, characterized in that: The lithium battery processing equipment includes the powder cooling device according to any one of claims 1 to 15.

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