Lithium battery homogenizing device

Abstract

The utility model provides a lithium battery homogenizing device and relates to the technical field of homogenizing and stirring. Comprising a homogenizer barrel body, a driving system and a stirring system, the stirring system takes a dispersion disc as a stirring main body, an L-shaped scraping plate is arranged on one side, close to the driving system, of the upper end of the dispersion disc, the dispersion disc is transversely placed in the homogenizer, and the whole lithium battery homogenizing device is of a horizontal structure. According to the horizontal design, metal scraps generated by abrasion of a shaft system are prevented from falling into slurry, stirring is more sufficient and uniform under the action of gravity, friction between the inner wall and a scraping plate is reduced due to application of a silicon carbide or zirconium oxide coating on the inner wall, and generation of the metal scraps is hindered.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery manufacturing, in particular to a lithium battery homogenizing device. Background Art

[0002] Materials are the basis of lithium-ion batteries, and their manufacturing process also affects the performance of lithium-ion batteries. Electrode slurry is the main material for electrochemical reactions in lithium-ion batteries, and its performance research is of great significance to the development of the entire system. Among them, the mixing process has a great impact on product quality in the entire production process of lithium batteries and is the most important link in the entire production process. At present, there are two main types of electrode slurry mixing processes:

[0003] The basic process of wet mixing process is sol-mixing conductive agent-mixing active material-dilution. This is the mainstream process in China at present; the basic process of dry mixing process is mixing active material, conductive agent and binder dry powder-adding appropriate amount of solvent to moisten-adding solvent to disperse and crush at high speed-dilution to adjust viscosity.

[0004] The problem with the wet mixing process is that the conductive agent has a large surface area and is easy to absorb the solvent, resulting in poor fluidity of the solvent. After adding the active substance, it is difficult to achieve a uniform dispersion state, and the homogenization process takes a long time and is inefficient. The difference between the dry pulping process and the wet process is that the material can achieve a good dispersion state under the action of various forces.

[0005] At present, the homogenizers that can realize the dry homogenization process have large internal friction between the equipment and the material during the dry homogenization process. Therefore, the friction loss between the main shaft and the bearing, and the material and the wall of the homogenizer barrel is particularly serious. After a certain amount of loss, the metal debris generated by the friction between the main shaft and the wall of the homogenizer barrel will enter the slurry, which will eventually affect the performance of the finished battery.

[0006] Therefore, finding a lithium battery homogenization device that can protect the generation of metal debris is a problem that needs to be solved at present. Summary of the invention

[0007] The utility model overcomes the problem that metal debris is easily generated during the homogenization process of a traditional homogenizer, and provides a lithium battery homogenization device with a horizontal structure.

[0008] The above technical problems are solved by the following technical solutions:

[0009] A lithium battery homogenizing device comprises a homogenizer barrel, a drive system and a stirring system. The stirring system uses a dispersion disc as a stirring body. An "L"-shaped scraper plate is provided on the upper end of the dispersion disc close to the drive system. The dispersion disc is placed horizontally inside the homogenizer. The lithium battery homogenizing device is a horizontal structure as a whole. The beneficial effect is that the horizontal structure enables the slurry components to be fully mixed under the action of gravity, and the stirring is more uniform.

[0010] Furthermore, the barrel of the homogenizer is placed horizontally, and gravity is used to prevent metal debris generated by the wear of the shaft system from falling into the slurry.

[0011] Furthermore, the inner wall of the homogenizer barrel is covered with a silicon carbide or zirconium oxide coating to reduce friction when in contact with the scraper plate, and a thickness detector can be configured outside the homogenizer to monitor changes in the thickness of the inner wall of the homogenizer barrel so as to timely recycle and replace the barrel.

[0012] Furthermore, the scraper plate is made of non-metallic material, which can prevent metal debris from being generated during the slurry stirring process and thus affecting the slurry quality.

[0013] Furthermore, the scraper plate fits the inner wall of the homogenizer barrel, so as to fully scrape off the slurry attached to the inner wall during the slurry stirring process.

[0014] Furthermore, the barrel of the homogenizer is a detachable structure, divided into two upper and lower semi-circular barrel parts, so as to facilitate the replacement of parts.

[0015] Furthermore, the dispersion disk is evenly distributed with small dispersion disk blades, which disperse the slurry during the slurry stirring process to make the stirring more sufficient and uniform.

[0016] Furthermore, the driving system, the coupling, and the stirring system together constitute the shaft system of the lithium-ion battery slurry dispersion device. This combination improves the coordination and dynamic performance of the shaft system.

[0017] Furthermore, two observation ports are provided on the side of the homogenizer barrel to facilitate observation of the slurry state during the stirring process.

[0018] Furthermore, a cooling water inlet and a cooling water outlet are provided at the bottom of the side end of the homogenizer barrel in sequence, which is beneficial to controlling the ambient temperature during the slurry stirring process.

[0019] Furthermore, the homogenizer is provided with a cooling pipeline for controlling the flow of cooling water.

[0020] Furthermore, a discharge port is provided at the lower side of the barrel of the homogenizer, from which the slurry is discharged after the stirring is completed.

[0021] The beneficial effects of the utility model are:

[0022] The homogenizer is a horizontal structure as a whole, and the slurry is mixed by gravity so that it can be fully stirred. The inner wall of the homogenizer barrel is covered with silicon carbide or zirconium oxide coating, which reduces the friction between the inner wall and the scraper. The polytetrafluoroethylene scraper is made of non-metallic material, and no metal debris will be generated during the stirring process. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural sectional view of an embodiment of the utility model.

[0024] Figure 2 It is a side view of the barrel of the homogenizer according to an embodiment of the utility model.

[0025] In the figure:

[0026] 1. Homogenizer barrel; 2. Motor; 3. Dispersing disc; 4. Dispersing disc blades; 5. Polytetrafluoroethylene scraper; 6. Coupling; 7. Speed ​​reducer; 8. Cooling water inlet; 9. Cooling water outlet; 10. Discharge port; 11. Observation port. DETAILED DESCRIPTION

[0027] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively with reference to the relevant drawings. The drawings provide preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly and comprehensively understood.

[0028] like Figure 1As shown, a lithium battery homogenizing device for protecting metal debris according to an embodiment of the utility model comprises a homogenizer barrel 1, a motor 2, a reducer 7, and a coupling 6. A dispersion disc 3 is used as a stirring body inside the lithium battery homogenizer. An "L"-shaped polytetrafluoroethylene scraper 5 is provided at one end of the left side of the dispersion disc 3 near the coupling. The dispersion disc 3 is connected to the reducer 7 through the coupling 6. The dispersion disc 3 is placed horizontally in the center of the homogenizer. Small dispersion disc blades 4 are evenly distributed on the dispersion disc 3. The other end of the reducer 7 is connected to the motor 2. A cooling water inlet 8 and a cooling water outlet 9 are provided at the lower end of the left side of the homogenizer barrel 1. A discharge port 10 is provided at the lower side of the homogenizer barrel 1. Two observation ports 11 are provided on the top side of the homogenizer barrel 1. Before starting work, the motor 2 and the reducer 7 are installed to form a driving system, the polytetrafluoroethylene scraper 5 and the dispersion disc 3 are installed to form a stirring system, and the reducer 7 in the driving system is connected to the dispersion disc 3 in the stirring system through the coupling 6 to form an axis system. The entire axis system is placed horizontally inside the homogenizer barrel 1, and the dispersion disc 3 is located horizontally at the center of the homogenizer barrel 1. The slurry mixture is placed inside the lower barrel of the homogenizer barrel 1, the detachable homogenizer barrel 1 is assembled to form a sealed space, the power is turned on, the motor 2 starts to rotate, the speed is adjusted by the reducer 7, and the dispersion disc 3 and the polytetrafluoroethylene scraper plate 5 are connected through the coupling 6 to rotate from top to bottom to perform the homogenization process, and the dispersion disc blade 4 moves accordingly to disperse the slurry, and the polytetrafluoroethylene scraper plate 5 rotates with the rotation of the dispersion disc 3 to scrape off the slurry attached to the inner wall of the homogenizer barrel 1 so that it is dispersed and stirred evenly by the dispersion disc 3 and the dispersion disc blade 4 again. The use of silicon carbide or zirconium oxide coating on the inner wall of the homogenizer barrel 1 reduces the friction between the polytetrafluoroethylene scraper plate and the inner wall of the homogenizer barrel, thereby preventing the generation of metal debris. During the homogenization process, the slurry state is observed through the observation port 11, and cooling water is added through the cooling water inlet 8 and the cooling water outlet 9 to control the ambient temperature so that the slurry reaches a good state. The cooling water is transported from the cooling water inlet 8 to the cooling water outlet 9 through the cooling pipe on the homogenizer, and the cooling pipe does not affect the stirring process of the homogenizer. After the slurry is stirred, it is discharged through the discharge port 10.

[0029] In one embodiment, for the above-mentioned homogenizer barrel 1, the homogenizer barrel 1 is a detachable structure, divided into two upper and lower semi-circular barrel structures, which makes it easier to replace parts. The inner wall of the homogenizer barrel 1 is covered with a silicon carbide or zirconium oxide coating, so that even if friction occurs with the material during the slurry stirring process, no metal debris will be generated, and a thickness detector can be installed on the outside of the homogenizer barrel 1 to monitor the barrel wall thickness so as to recycle and replace the barrel in time.

[0030] In one embodiment, for the motor 2, the motor 2 is located at the leftmost end of the entire system. The motor 2 provides power for the shaft system. The motor 2 is connected to the reducer 7 to form a driving system of the homogenizer.

[0031] In one embodiment, for the above-mentioned dispersion disc 3, the dispersion disc 3 is placed horizontally in the homogenizer barrel. The dispersion disc blades 4 are evenly distributed on the dispersion disc 3. The left side of the dispersion disc 3 is connected to the reducer 7 in the drive system through the coupling 6. The "L"-shaped polytetrafluoroethylene scraper 5 is installed between the left side of the dispersion disc 3 and the coupling 6. The dispersion disc 3, the dispersion disc blades 4 and the polytetrafluoroethylene scraper 5 together constitute the stirring system of the homogenizer. The dispersion disc 3 replaces the traditional stirring blade, which has the beneficial effects of high strength, durability, easy replacement, easy cleaning and no pollution. The shaft system composed of the dispersion disc 3, the motor 2, the reducer 7, the coupling 6 and the polytetrafluoroethylene scraper 5 is designed horizontally as a whole, which can make the slurry components fully mixed and stirred evenly under the action of gravity, and at the same time, it can prevent metal debris generated by wear of the shaft system from entering the slurry.

[0032] In one embodiment, for the above-mentioned dispersion disk blades 4, the dispersion disk blades 4 are evenly distributed on the dispersion disk 3. The dispersion disk blades 4 can disperse the slurry during the stirring process, so that the stirring is more sufficient and uniform.

[0033] In one embodiment, for the above-mentioned polytetrafluoroethylene scraper 5, the polytetrafluoroethylene scraper 5 is in an "L" shape and is located between the dispersion disk 3 and the coupling 6. The polytetrafluoroethylene scraper 5 is made of non-metallic material, and no metal debris will be generated during the stirring process, thereby affecting the slurry quality. The polytetrafluoroethylene scraper 5 fits the inner wall curve of the homogenizer barrel 1. During the slurry stirring process, the slurry attached to the inner wall can be fully scraped off without causing wear to the barrel body, thereby achieving the purpose of long service life, preventing the generation of metal debris, and making the stirring more sufficient and uniform. The polytetrafluoroethylene scraper 5 has the following advantages:

[0034] (1) High and low temperature resistance. The ambient temperature can change during the slurry mixing process, and the high and low temperature resistance can prevent the temperature change from affecting it;

[0035] (2) Corrosion resistance. Its corrosion resistance can prevent some slurries from being corrosive and affecting slurry stirring;

[0036] (3) Long aging life. Not easy to age, its basic performance can remain unchanged for a long time, greatly improving its durability;

[0037] (4) High lubricity and non-adhesion. Its high lubricity and non-adhesion enable the polytetrafluoroethylene scraper 5 to fully scrape off the slurry attached to the inner wall, making the stirring process smoother;

[0038] (5) Non-toxic. Physiologically inert, easy to replace and recycle;

[0039] (6) Insulation: Ideal Class C insulation material to avoid affecting the slurry stirring.

[0040] In one embodiment, for the coupling 6, the coupling 6 connects the dispersion disc 3 and the reducer 7. The coupling 6 plays the role of connection, buffering and vibration reduction, thereby improving the dynamic performance of the shaft system.

[0041] In one embodiment, for the above-mentioned reducer 7, the reducer 7 is connected to the motor 2 to form a drive system, which plays a role in reducing the rotation speed and increasing the torque in the drive system. The other end of the reducer 7 is connected to the dispersion disk 3 in the stirring system through the coupling 6, so that the drive system and the stirring system are connected to form the shaft system of the homogenizer.

[0042] In one embodiment, for the cooling water inlet 8 and the cooling water outlet 9, the cooling water inlet 8 and the cooling water outlet 9 are located at the bottom left of the homogenizer barrel 1. The cooling water inlet 8 and the cooling water outlet 9 flow through the cooling pipe on the homogenizer, and the cooling pipe does not affect the stirring process of the homogenizer. The cooling water inlet 8 and the cooling water outlet 9 can provide the function of controlling the ambient temperature during the slurry stirring process, thereby improving the slurry quality.

[0043] In one embodiment, the discharge port 10 is located at the bottom of the homogenizer barrel. The discharge port 10 is used to discharge the slurry through the discharge port 10 after the slurry is stirred.

[0044] In one embodiment, the observation port 11 is located at the top of the homogenizer barrel 1. The observation port 11 is convex on the homogenizer barrel 1. This design ensures the integrity of the inner wall of the homogenizer barrel 1 and is used to observe the slurry state so as to control the homogenization conditions.

[0045] In view of the actual installation process, the characteristic of the utility model is that the homogenizer barrel 1 and the dispersion plate 3 are horizontal structures, and the slurry is mixed by gravity so that it can be fully stirred. The inner wall of the homogenizer barrel 1 is covered with a silicon carbide or zirconium oxide coating, which reduces the friction between the inner wall of the homogenizer barrel 1 and the scraper plate 5, thereby hindering the generation of metal debris, and it can be realized that a thickness detector is configured outside the homogenizer to monitor the thickness change of the inner wall of the homogenizer barrel 1 so as to recover and replace the barrel in time. The homogenizer adopts the dispersion plate 3 as the stirring body, so that the stirring process is more sufficient and uniform. The "L"-shaped polytetrafluoroethylene scraper plate 5 is installed on the side of the dispersion plate 3 near the power system. The polytetrafluoroethylene scraper plate 5 is made of non-metallic material, and no metal debris will be generated during the stirring process. The polytetrafluoroethylene scraper plate 5 has the basic properties of high temperature resistance, low temperature resistance, corrosion resistance, long aging life, high lubricity, non-adhesion, non-toxicity, insulation, etc., and fits the inner wall curve of the homogenizer barrel 1. During the slurry stirring process, the slurry attached to the inner wall can be fully scraped off without causing wear to the barrel body, thereby achieving a long service life, preventing the generation of metal debris, and making the stirring more sufficient and uniform.

[0046] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A lithium battery homogenizing device, comprising a homogenizer barrel (1), a driving system and a stirring system, characterized in that: The stirring system uses a dispersion plate (3) as a stirring body, an "L"-shaped scraper plate (5) is provided on the upper end of the dispersion plate close to the driving system, the dispersion plate (3) is placed horizontally inside the homogenizer, and the lithium battery homogenizing device is a horizontal structure as a whole; The inner wall of the homogenizer barrel (1) is covered with a silicon carbide or zirconium oxide coating.

2. The lithium battery homogenizing device according to claim 1, characterized in that: The homogenizer barrel (1) is placed horizontally.

3. The lithium battery homogenizing device according to claim 1, characterized in that: The scraper plate (5) is a polytetrafluoroethylene scraper plate, and the scraper plate (5) is in contact with the inner wall of the homogenizer barrel (1).

4. The lithium battery homogenizing device according to claim 1 or 2, characterized in that: The homogenizer barrel (1) is a detachable structure, divided into two upper and lower semi-circular barrel parts.

5. The lithium battery homogenizing device according to claim 1, characterized in that: The dispersion disk (3) is evenly distributed with dispersion disk blades (4).

6. The lithium battery homogenizing device according to claim 1, characterized in that: The driving system and the stirring system are connected via a coupling (6) to form the shaft system of the lithium battery homogenizing device.

7. The lithium battery homogenizing device according to claim 4, characterized in that: Two observation ports (11) are provided on the side of the homogenizer barrel (1).

8. The lithium battery homogenizing device according to claim 4, characterized in that: The homogenizer is provided with a cooling pipeline, and the side of the homogenizer barrel (1) is provided with a cooling water inlet (8) and a cooling water outlet (9).

9. The lithium battery homogenizing device according to claim 8, characterized in that: A discharge port (10) is provided on the lower side of the homogenizer barrel (1).

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