High-voltage lithium cobalt oxide material preparation mixing device
By setting an external heat exchange cylinder and a central heat exchange unit in the high-voltage lithium cobalt oxide material mixing device, combined with low-speed and high-speed stirring units, the problem of temperature rise during the mixing process is solved, achieving a rapid and uniform cooling effect, and ensuring the stability and mixing uniformity of the material.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANDONG CHUANGLU ADVANCED BATTERY TECH CO LTD
- Filing Date
- 2025-05-16
- Publication Date
- 2026-04-21
AI Technical Summary
During the mixing process of high-voltage lithium cobalt oxide materials, high-speed shear stirring may lead to problems such as increased slurry temperature, solvent evaporation, uncontrolled slurry viscosity, and thermal decomposition of binders or active materials.
A high-voltage lithium cobalt oxide material preparation mixing device was designed, comprising a vessel body, an outer heat exchange cylinder, and a central heat exchange unit. The heat exchange medium channel formed by the liquid inlet and liquid outlet exchanges heat with the raw materials inside and outside the vessel body. Combined with low-speed and high-speed stirring units, the inner and outer sides of the vessel body are cooled simultaneously, the fluid boundary layer is destroyed, and the heat exchange efficiency is improved.
This method enables rapid and uniform cooling of the raw materials inside the vessel, improves the heat exchange efficiency of the mixing process, avoids solvent evaporation and material decomposition caused by temperature rise, and ensures mixing uniformity.
Smart Images
Figure CN224141955U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of mixing device technology, specifically a mixing device for preparing high-voltage lithium cobalt oxide materials. Background Technology
[0002] High-voltage lithium cobalt oxide typically refers to materials that can operate at voltages higher than the conventional 4.2V. The mixing process of high-voltage lithium cobalt oxide usually refers to the uniform dispersion of active materials (LCO), conductive agents (such as Super P, CNT), binders (PVDF), etc., to form an electrode slurry.
[0003] When processing high-voltage lithium cobalt oxide materials using a high-speed shear mixer, the heat generated by high-speed shear friction may cause the slurry temperature to rise (especially at high solid content), causing solvents (such as NMP) to evaporate, slurry viscosity to run out of control, and binders or active materials to thermally decompose. Therefore, cooling of the raw materials is required during the mixing process. Based on this, a mixing device for preparing high-voltage lithium cobalt oxide materials is provided. Utility Model Content
[0004] The purpose of this invention is to provide a high-voltage lithium cobalt oxide material preparation and mixing device in order to solve the problems mentioned above.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a mixing device for preparing high-voltage lithium cobalt oxide materials, comprising a stirred tank assembly consisting of a vessel body, an outer heat exchange cylinder, a liquid inlet, and a liquid outlet. The outer heat exchange cylinder is fixed to the outside of the vessel body and completely encloses the bottom of the vessel body. The liquid inlet is fixed to one side of the top of the outer heat exchange cylinder, and the liquid outlet is fixed to one side of the bottom of the outer heat exchange cylinder. The liquid inlet and the liquid outlet are connected to the inner cavity of the outer heat exchange cylinder. The heat exchange medium channel formed by the liquid inlet, the outer heat exchange cylinder, and the liquid outlet is used to exchange heat for the raw materials near the inner wall of the vessel body. The interior of the vessel body is also provided with a central heat exchange unit, which is used to exchange heat for the raw materials distributed in the middle of the vessel body.
[0006] The central heat exchange unit includes an inner heat exchange cylinder, an inlet pipe, and an outlet pipe;
[0007] The inner heat exchange cylinder is fixed to the bottom middle of the inner wall of the vessel and penetrates the vessel body and the outer heat exchange cylinder to the bottom of the outer heat exchange cylinder. The top of the inner heat exchange cylinder is close to the top of the inner wall of the vessel body.
[0008] The liquid inlet pipe and liquid outlet pipe are fixed to the bottom of the inner heat exchange cylinder and extend into the interior of the inner heat exchange cylinder. The liquid inlet pipe is distributed in the middle of the inner heat exchange cylinder and the top of the liquid inlet pipe extends close to the top of the inner wall of the inner heat exchange cylinder. The top port of the liquid outlet pipe is flush with the bottom of the inner wall of the inner heat exchange cylinder.
[0009] The heat exchange medium channel, consisting of an inlet pipe, an inner heat exchange cylinder, and an outlet pipe, is used to exchange heat for the raw material near the inner heat exchange cylinder.
[0010] The top, interior and inner heat exchange cylinder of the vessel are also provided with a stirring assembly, which includes a low-speed stirring unit and a high-speed stirring unit.
[0011] The low-speed stirring unit is used to stir the raw materials inside the vessel and the heat exchange medium inside the inner heat exchange cylinder at a low speed.
[0012] The high-speed stirring unit is used to perform high-speed stirring of the raw materials inside the vessel.
[0013] As a further embodiment of this utility model: the low-speed stirring unit includes a low-speed motor, a first rotating shaft, and a concave scraper;
[0014] The low-speed motor is fixedly installed at the top center of the vessel body, and the first rotating shaft is fixedly connected to the output end of the low-speed motor and extends through the interior of the vessel body.
[0015] The concave scraper is fixed to the outside of the first rotating shaft and distributed between the inside of the vessel and the outside of the inner heat exchange cylinder. The concave scraper is in contact with the side wall of the vessel, the bottom of the vessel, and the side wall of the inner heat exchange cylinder.
[0016] The low-speed motor drives the concave scraper to rotate at low speed to achieve low-speed stirring of the raw materials inside the vessel, and at the same time to achieve scraping operation on the inner wall side, the bottom of the inner wall, and the outer wall side of the inner heat exchanger.
[0017] As a further improvement of this utility model, the low-speed stirring unit also includes an inverted U-shaped scraper;
[0018] The bottom of the first rotating shaft extends through the interior of the inner heat exchange cylinder. The inverted U-shaped scraper is distributed on the inner side of the inner heat exchange cylinder and fixed to the bottom of the first rotating shaft. The inverted U-shaped scraper is in contact with the inner wall side of the inner heat exchange cylinder.
[0019] The low-speed rotation of the inverted U-shaped scraper is used to agitate the heat exchange medium inside the inner heat exchange cylinder.
[0020] As a further embodiment of this utility model: the high-speed stirring unit includes a high-speed motor, a second rotating shaft, and stirring blades;
[0021] The high-speed motor is fixed to the top of the vessel and distributed on one side of the low-speed motor. The second rotating shaft is fixedly connected to the output end of the high-speed motor and extends into the interior of the vessel. The stirring blade is fixed to the bottom of the high-speed motor.
[0022] The high-speed motor drives the stirring blades to rotate at high speed to achieve high-speed stirring of the raw materials inside the vessel.
[0023] As a further embodiment of this utility model: the high-speed stirring unit is arranged in a ring around the low-speed motor, and the multiple sets of the first rotating shaft and concave scraper are distributed on the concave side of the concave scraper.
[0024] Compared with the prior art, the beneficial effects of this utility model are:
[0025] By setting up a stirred tank assembly with a central heat exchange unit, the raw materials inside and outside the tank can be cooled simultaneously, resulting in faster efficiency and more uniform temperature. At the same time, the low-speed rotation of the concave scraper and the inverted U-shaped scraper can break the fluid boundary layer, reduce thermal resistance, thereby improving the convective heat transfer coefficient and further improving the heat transfer efficiency. Attached Figure Description
[0026] Figure 1 This is a schematic diagram of the structure of this utility model;
[0027] Figure 2 This is a bottom view of the bottom structure of this utility model;
[0028] Figure 3 This is a cross-sectional view of the vessel body and the outer heat exchange cylinder of this utility model;
[0029] Figure 4 This is a cross-sectional view of the vessel body, outer heat exchange cylinder, and inner heat exchange cylinder of this utility model.
[0030] Figure 5 This is a cross-sectional exploded view of the present invention.
[0031] In the diagram: 1. Stirring vessel assembly; 101. Vessel body; 102. External heat exchanger; 103. Liquid inlet; 104. Liquid outlet; 105. Internal heat exchanger; 106. Liquid inlet pipe; 107. Liquid outlet pipe; 2. Stirring assembly; 201. Low-speed motor; 202. First rotating shaft; 203. Concave scraper; 204. Inverted U-shaped scraper; 205. High-speed motor; 206. Second rotating shaft; 207. Stirring blade. Detailed Implementation
[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0033] Please see Figures 1-5In this embodiment of the present invention, a mixing device for preparing high-voltage lithium cobalt oxide material includes a stirred tank assembly 1 consisting of a vessel body 101, an outer heat exchange cylinder 102, a liquid inlet 103, and a liquid outlet 104. The outer heat exchange cylinder 102 is fixed to the outside of the vessel body 101 and completely covers the bottom of the vessel body 101. The liquid inlet 103 is fixed to the top side of the outer heat exchange cylinder 102, and the liquid outlet 104 is fixed to the bottom side of the outer heat exchange cylinder 102. The liquid inlet 103 and the liquid outlet 104 are connected to the inner cavity of the outer heat exchange cylinder 102. The heat exchange medium channel formed by the liquid inlet 103, the outer heat exchange cylinder 102, and the liquid outlet 104 is used to exchange heat for the raw materials near the inner wall side of the vessel body 101. A central heat exchange unit is also provided inside the vessel body 101. The central heat exchange unit is used to exchange heat for the raw materials distributed in the middle of the vessel body 101.
[0034] The central heat exchange unit includes an inner heat exchange cylinder 105, an inlet pipe 106, and an outlet pipe 107.
[0035] The inner heat exchange cylinder 105 is fixed to the bottom middle of the inner wall of the vessel body 101 and passes through the vessel body 101 and the outer heat exchange cylinder 102 to the bottom of the outer heat exchange cylinder 102. The top of the inner heat exchange cylinder 105 is close to the top of the inner wall of the vessel body 101.
[0036] The liquid inlet pipe 106 and the liquid outlet pipe 107 are fixed to the bottom of the inner heat exchange cylinder 105 and extend into the interior of the inner heat exchange cylinder 105. The liquid inlet pipe 106 is distributed in the middle of the inner heat exchange cylinder 105 and the top of the liquid inlet pipe 106 extends close to the top of the inner wall of the inner heat exchange cylinder 105. The top port of the liquid outlet pipe 107 is flush with the bottom of the inner wall of the inner heat exchange cylinder 105.
[0037] The heat exchange medium channel, consisting of the inlet pipe 106, the inner heat exchange cylinder 105, and the outlet pipe 107, is used to exchange heat for the raw material near the inner heat exchange cylinder 105.
[0038] The top, interior and inner heat exchange cylinder 105 of the vessel body 101 are also provided with a stirring assembly 2, which includes a low-speed stirring unit and a high-speed stirring unit.
[0039] The low-speed stirring unit is used to stir the raw materials inside the vessel 101 and the heat exchange medium inside the inner heat exchange cylinder 105 at low speed.
[0040] The high-speed stirring unit is used to perform high-speed stirring of the raw materials inside the vessel 101;
[0041] The low-speed stirring unit includes a low-speed motor 201, a first rotating shaft 202, a concave scraper 203, and an inverted U-shaped scraper 204;
[0042] The low-speed motor 201 is fixedly installed at the top center of the vessel body 101, and the first rotating shaft 202 is fixedly connected to the output end of the low-speed motor 201 and extends through the interior of the vessel body 101.
[0043] The concave scraper 203 is fixed to the outside of the first rotating shaft 202 and distributed between the inside of the vessel body 101 and the outside of the inner heat exchange cylinder 105. The concave scraper 203 is in contact with the inner wall side of the vessel body 101, the bottom of the inner wall of the vessel body 101, and the outer wall side of the inner heat exchange cylinder 105.
[0044] The low-speed motor 201 drives the concave scraper 203 to rotate at low speed to achieve low-speed stirring of the raw materials inside the vessel 101, and at the same time achieve scraping operation on the inner wall side, the bottom of the inner wall of the vessel 101, and the outer wall side of the inner heat exchange cylinder 105.
[0045] The bottom of the first rotating shaft 202 extends through the interior of the inner heat exchange cylinder 105. The inverted U-shaped scraper 204 is distributed on the inner side of the inner heat exchange cylinder 105 and fixed to the bottom of the first rotating shaft 202. The inverted U-shaped scraper 204 is in contact with the inner wall side of the inner heat exchange cylinder 105.
[0046] The low-speed rotation of the inverted U-shaped scraper 204 is used to agitate the heat exchange medium inside the inner heat exchange cylinder 105.
[0047] In this embodiment, it should be noted that the top of the vessel body 101 is provided with corresponding inlet, measuring port, exhaust port, manhole and other structures, and the bottom of the external heat exchange cylinder 102 is fixed with an outlet that extends through to the bottom of the inner wall of the vessel body 101. These structures are all conventional structures of existing stirring vessels, so they will not be described in detail here.
[0048] During the preparation and mixing of high-voltage lithium cobalt oxide materials, the inlet 103, inlet pipe 106, outlet 104, and outlet pipe 107 are connected to the circulation pipeline of the heat exchange medium through connecting pipes.
[0049] The heat exchange medium can cool the raw material inside the vessel 101 through two pipelines:
[0050] The first pipeline flows along the channel formed by the liquid inlet 103, the inner cavity of the outer heat exchange cylinder 102, and the liquid outlet 104, so that the raw materials near the inner wall side and bottom of the vessel body 101 can be cooled by heat exchange.
[0051] The second pipeline flows along the channel formed by the inlet pipe 106, the inner cavity of the inner heat exchange cylinder 105, and the outlet pipe 106, which can exchange heat and cool the raw material near the inner wall side of the inner heat exchange cylinder 105.
[0052] By using the heat exchange and cooling of the two pipelines mentioned above, the raw materials inside and outside the vessel 101 can be cooled simultaneously, which is more efficient and the temperature is more uniform.
[0053] At the same time, the low-speed motor 201 synchronously drives the concave scraper 203 and the inverted U-shaped scraper 204 to rotate at low speed. The concave scraper 203 performs scraping operations on the inner wall side of the vessel body 101, the bottom of the inner wall of the vessel body 101, and the outer wall side of the inner heat exchange cylinder 105, while the inverted U-shaped scraper 204 can agitate the heat exchange medium inside the inner heat exchange cylinder 105. This can break the fluid boundary layer, reduce thermal resistance, thereby increasing the convective heat transfer coefficient and further improving the heat exchange efficiency.
[0054] Please refer to this carefully. Figures 1-5 The high-speed stirring unit includes a high-speed motor 205, a second rotating shaft 206, and stirring blades 207;
[0055] The high-speed motor 205 is fixed to the top of the vessel body 101 and distributed on one side of the low-speed motor 201. The second rotating shaft 206 is fixedly connected to the output end of the high-speed motor 205 and extends into the interior of the vessel body 101. The stirring blade 207 is fixed to the bottom of the high-speed motor 205.
[0056] The high-speed motor 205 drives the stirring blade 207 to rotate at high speed to achieve high-speed stirring of the raw materials inside the vessel 101;
[0057] The high-speed stirring unit is arranged in a ring around the low-speed motor 201, and the multiple sets of first rotating shafts 202 and concave scrapers 203 are distributed on the concave side of the concave scraper 203.
[0058] In this embodiment: the high-speed motor 205 drives the stirring blade 207 to rotate at high speed, which can realize the high-speed stirring and mixing of the raw materials of high-voltage lithium cobalt oxide. The structure of multiple sets of high-speed stirring units ensures uniform mixing of the raw materials of high-voltage lithium cobalt oxide.
[0059] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A mixing device for preparing high-voltage lithium cobalt oxide materials, comprising a stirred tank assembly (1) consisting of a vessel body (101), an external heat exchange cylinder (102), an inlet (103), and an outlet (104), wherein the external heat exchange cylinder (102) is fixed to the outside of the vessel body (101) and completely covers the bottom of the vessel body (101), the inlet (103) is fixed to one side of the top of the external heat exchange cylinder (102), and the outlet (104) is fixed to one side of the bottom of the external heat exchange cylinder (102), and the inlet (103) and outlet (104) are connected to the inner cavity of the external heat exchange cylinder (102), and the heat exchange medium channel formed by the inlet (103), the external heat exchange cylinder (102), and the outlet (104) is used to exchange heat for the raw material near the inner wall side of the vessel body (101), characterized in that, The interior of the vessel body (101) is also provided with a central heat exchange unit, which is used to exchange heat for the raw materials distributed in the middle of the vessel body (101); The central heat exchange unit includes an inner heat exchange cylinder (105), an inlet pipe (106), and an outlet pipe (107); The inner heat exchange cylinder (105) is fixed to the bottom middle of the inner wall of the vessel body (101) and penetrates the vessel body (101) and the outer heat exchange cylinder (102) to the bottom of the outer heat exchange cylinder (102). The top of the inner heat exchange cylinder (105) is close to the top of the inner wall of the vessel body (101). The liquid inlet pipe (106) and liquid outlet pipe (107) are fixed to the bottom of the inner heat exchange cylinder (105) and extend into the interior of the inner heat exchange cylinder (105). The liquid inlet pipe (106) is distributed in the middle of the inner heat exchange cylinder (105) and the top of the liquid inlet pipe (106) extends close to the top of the inner wall of the inner heat exchange cylinder (105). The top port of the liquid outlet pipe (107) is flush with the bottom of the inner wall of the inner heat exchange cylinder (105). The heat exchange medium channel, consisting of the inlet pipe (106), the inner heat exchange cylinder (105), and the outlet pipe (107), is used to exchange heat for the raw material near the inner heat exchange cylinder (105). The top, interior and inner heat exchange cylinder (105) of the vessel body (101) are also provided with a stirring assembly (2), which includes a low-speed stirring unit and a high-speed stirring unit. The low-speed stirring unit is used to stir the raw materials inside the vessel body (101) and the heat exchange medium inside the inner heat exchange cylinder (105) at a low speed. The high-speed stirring unit is used to perform high-speed stirring of the raw materials inside the vessel (101).
2. The high-voltage lithium cobalt oxide material preparation mixing device according to claim 1, characterized in that, The low-speed stirring unit includes a low-speed motor (201), a first rotating shaft (202), and a concave scraper (203); The low-speed motor (201) is fixedly installed at the top center of the vessel body (101), and the first rotating shaft (202) is fixedly connected to the output end of the low-speed motor (201) and extends through the interior of the vessel body (101); The concave scraper (203) is fixed to the outside of the first rotating shaft (202) and distributed between the inside of the vessel body (101) and the outside of the inner heat exchange cylinder (105). The concave scraper (203) is in contact with the inner wall side of the vessel body (101), the bottom of the inner wall of the vessel body (101), and the outer wall side of the inner heat exchange cylinder (105). The low-speed motor (201) drives the concave scraper (203) to rotate at low speed to achieve low-speed stirring of the raw materials inside the vessel body (101), and at the same time achieve scraping operation on the inner wall side, the bottom of the inner wall of the vessel body (101), and the outer wall side of the inner heat exchange cylinder (105).
3. The mixing device for preparing high-voltage lithium cobaltate material according to claim 2, characterized in that, The low-speed stirring unit also includes an inverted U-shaped scraper (204); The bottom of the first rotating shaft (202) extends through the interior of the inner heat exchange cylinder (105), and the inverted U-shaped scraper (204) is distributed on the inner side of the inner heat exchange cylinder (105) and fixed to the bottom of the first rotating shaft (202). The inverted U-shaped scraper (204) is in contact with the inner wall side of the inner heat exchange cylinder (105). The low-speed rotation of the inverted U-shaped scraper (204) is used to agitate the heat exchange medium inside the inner heat exchange cylinder (105).
4. The high-voltage lithium cobalt oxide material preparation mixing device according to claim 2, wherein, The high-speed stirring unit includes a high-speed motor (205), a second rotating shaft (206), and stirring blades (207); The high-speed motor (205) is fixed to the top of the vessel body (101) and distributed on one side of the low-speed motor (201). The second rotating shaft (206) is fixedly connected to the output end of the high-speed motor (205) and extends into the interior of the vessel body (101). The stirring blade (207) is fixed to the bottom of the high-speed motor (205). The high-speed motor (205) drives the stirring blade (207) to rotate at high speed to achieve high-speed stirring of the raw materials inside the vessel (101).
5. The high-voltage lithium cobalt oxide material preparation mixing device according to claim 4, characterized in that, The high-speed stirring unit is arranged in a ring around the low-speed motor (201), and the multiple sets of the first rotating shaft (202) and concave scraper (203) are distributed on the concave side of the concave scraper (203).