Lithium ion electrolyte stirring device

Abstract

The utility model discloses a lithium ion electrolyte stirring device and belongs to the technical field of lithium ion electrolyte processing. Comprising a motor arranged at the top end of a blending tank, a first rotating shaft vertically arranged in the blending tank and connected with the output end of the motor, a second rotating shaft arranged outside the first rotating shaft in a sleeving manner and capable of vertically displacing outside the first rotating shaft, and a limiting ring rotationally arranged outside the second rotating shaft in a sleeving manner, the stirring rods are arranged outside the second rotating shaft, the scraping plate is arranged at the bottom end of the second rotating shaft, and the hydraulic rod is arranged on the inner top wall of the blending tank and drives the limiting ring to move in the vertical direction. According to the utility model, the limiting ring and the second rotating shaft can synchronously and vertically move so as to adjust the heights of the second rotating shaft and the scraping plate, when scraping is needed, the scraping plate moves downwards to be in contact with the blending tank so as to stir solid materials deposited on the bottom wall of the blending tank, and when scraping is not needed, the scraping plate moves upwards so as to stir the solid materials deposited on the bottom wall of the blending tank. Therefore, friction with the bottom wall of the blending tank is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium ion electrolyte processing, in particular to a lithium ion electrolyte stirring device. Background Art

[0002] Lithium-ion electrolytes are typically prepared in a mixing tank under certain conditions and proportions using high-purity organic solvents, electrolyte lithium salts, and necessary additives. Specifically, during the mixing process, various organic solvents are first added to the tank and stirred evenly. Then, solid raw materials such as electrolyte lithium salts and additives are added, and stirring continues.

[0003] Because the solid raw materials must be completely added before stirring, some of them will gradually sink to the bottom of the mixing tank during this process. In existing technologies, the stirring device usually does not contact the tank bottom, making it difficult to fully stir the solid raw materials deposited at the bottom. Currently, to address this situation, some mixing tanks have a scraper plate installed below the stirring assembly, so that the scraper plate contacts the bottom of the mixing tank. This can effectively stir the solid raw materials deposited on the tank bottom. However, because the scraper plate is installed directly on the bottom of the tank, long-term stirring will cause wear between the bottom of the tank and the scraper plate, affecting the service life of both. At the same time, the worn trace powder directly enters the electrolyte, causing changes in the electrolyte composition and thus affecting the performance of the electrolyte. Utility Model Content

[0004] The purpose of the utility model is to provide a lithium ion electrolyte stirring device, which can adjust the height of the scraper plate according to actual needs. When scraping is required, the scraper plate is moved down to the bottom end of the mixing tank, thereby stirring the solid material deposited on the bottom wall of the mixing tank. When scraping is not required, the scraper plate is moved up. In this way, the friction between the scraper plate and the bottom of the mixing tank can be reduced, thereby reducing the degree of wear.

[0005] The purpose of this utility model is achieved through the following technical solutions:

[0006] A lithium-ion electrolyte stirring device includes a motor arranged at the top of a mixing tank, a first rotating shaft vertically arranged in the mixing tank and connected to the output end of the motor, a second rotating shaft sleeved on the outside of the first rotating shaft and capable of vertical displacement outside the first rotating shaft, a limit ring rotatably sleeved on the outside of the second rotating shaft, a plurality of stirring rods arranged on the outside of the second rotating shaft, a scraper plate arranged at the bottom end of the second rotating shaft, and a hydraulic rod arranged on the top wall of the mixing tank and driving the limit ring to move in the vertical direction.

[0007] Preferably, the two surfaces of the first rotating shaft and the second rotating shaft that are close to each other are provided with a plurality of vertical sliding grooves on one side, and a sliding block that slidably cooperates with the vertical sliding grooves is provided on the other side.

[0008] Preferably, a ball bearing is provided between the limiting ring and the second rotating shaft.

[0009] Preferably, a connecting plate is fixedly provided on the outside of the first rotating shaft, and a telescopic tube is provided between the bottom end of the connecting plate and the top end of the second rotating shaft.

[0010] Preferably, the telescopic tube is a bellows.

[0011] Preferably, a baffle is sleeved outside the second rotating shaft and between the limiting ring and the stirring rod, and the vertical downward projection of the ball bearing is located inside the baffle.

[0012] Preferably, the vertical upward projection of the ball bearing is located inside the connecting plate.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] A second rotating shaft is slidably sleeved on the outside of the first rotating shaft, a limiting ring is rotatably sleeved on the outside of the second rotating shaft, and a hydraulic rod that can drive the limiting ring to move in the vertical direction is set on the top wall of the mixing tank. Under the action of the hydraulic rod, the limiting ring and the second rotating shaft can be moved synchronously in the vertical direction, thereby adjusting the height of the second rotating shaft, and then adjusting the height of the scraper plate set at the bottom end of the second rotating shaft. When scraping is required, the second rotating shaft is moved downward until the scraper plate contacts the mixing tank, thereby stirring the solid material deposited on the bottom wall of the mixing tank. When scraping is not required, the scraper plate is moved up. In this way, the friction between the scraper plate and the bottom of the mixing tank can be reduced, thereby reducing the degree of wear. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic structural diagram of the stirring device in Example 1 when viewed from the front;

[0016] Figure 2 for Figure 1 A schematic cross-sectional view of the stirring device in the front view direction;

[0017] Figure 3 for Figure 2 Schematic diagram of the enlarged structure of A in the middle;

[0018] Figure 4 for Figure 1 A schematic diagram of the cross-sectional structure of the stirring device in the top view direction;

[0019] Figure 5 for Figure 4A schematic diagram of the structure viewed from the top with the first rotation axis and the second rotation axis in the middle;

[0020] In the figure: 1-mixing tank, 2-motor, 3-first rotating shaft, 4-second rotating shaft, 5-limiting ring, 6-stirring rod, 7-scraper plate, 8-hydraulic rod, 9-vertical slide, 10-slider, 11-ball bearing, 12-connecting plate, 13-telescopic tube, 14-baffle. DETAILED DESCRIPTION

[0021] Example 1

[0022] In the prior art, when preparing lithium-ion electrolyte, solid raw materials must be completely added before stirring. During this process, some solid raw materials will gradually sink to the bottom of the preparation tank 1. In the prior art, the stirring device usually does not contact the tank bottom, making it difficult to fully stir the solid raw materials deposited at the bottom. Currently, to address this situation, some stirring tanks are equipped with a scraper plate 7 below the stirring assembly, so that the scraper plate 7 contacts the bottom of the preparation tank 1. This can effectively stir the solid raw materials deposited at the bottom of the tank. However, because the scraper plate 7 is directly installed at the bottom of the tank, long-term stirring will cause wear between the bottom of the tank and the scraper plate 7, affecting the service life of both. At the same time, trace amounts of powder after wear directly enter the electrolyte, causing changes in the electrolyte composition and thus affecting the performance of the electrolyte.

[0023] Based on this, the utility model provides a lithium ion electrolyte stirring device, such as Figure 1 and Figure 2 As shown, it includes a motor 2 arranged at the top of the mixing tank 1, a first rotating shaft 3 vertically arranged in the mixing tank 1 and connected to the output end of the motor 2, a second rotating shaft 4 sleeved outside the first rotating shaft 3 and capable of vertical displacement outside the first rotating shaft 3, a limiting ring 5 rotatably sleeved outside the second rotating shaft 4, a plurality of stirring rods 6 arranged outside the second rotating shaft 4, a scraper 7 arranged at the bottom end of the second rotating shaft 4, and a hydraulic rod 8 arranged on the top wall of the mixing tank 1 and driving the limiting ring 5 to move in the vertical direction. Further, as Figure 1 、 Figure 3 、 Figure 4 and Figure 5 As shown, the first rotating shaft 3 and the second rotating shaft 4 have two adjacent surfaces, one of which is provided with a plurality of vertical slide grooves 9, and the other surface is provided with a slider 10 that slidably cooperates with the vertical slide grooves 9. Furthermore, to improve the smoothness of rotation between the second rotating shaft 4 and the limiting ring 5, a ball bearing 11 (existing technology) is provided between the limiting ring 5 and the second rotating shaft 4.

[0024] Working principle: When it is necessary to move the scraper plate 7 to the bottom of the mixing tank 1 to scrape up the solid material deposited at the bottom of the mixing tank 1 so that the deposited material is fully mixed with other materials (such as in the initial stage of mixing), the hydraulic rod 8 is started at this time to move the limit ring 5 connected to the hydraulic rod 8 downward. At this time, the second rotating shaft 4 connected to the second limit ring 5 through the ball bearing 11 also moves downward. During the movement, the slider 10 slides down in the vertical slide 9 until the scraper plate 7 contacts the mixing tank 1. The hydraulic rod 8 just reaches the maximum range. At this time, the motor 2 is turned on to make the first rotating shaft 3 drive the second rotating shaft 4 to rotate synchronously (because the first rotating shaft 3 and the second rotating shaft 4 are connected through the slider 10 and the vertical slide 9. Therefore, no horizontal displacement will occur between the two. The setting of the slider 10 and the vertical slide 9 can not only make the second rotating shaft 4 In addition to the smooth sliding outside of the first rotating shaft 3, the first rotating shaft 3 and the second rotating shaft 4 can also be limited to ensure that no horizontal displacement occurs between the two). During the rotation of the second rotating shaft 4, the multiple stirring rods 6 outside the second rotating shaft 4 can stir the lithium-ion electrolyte raw materials to improve the mixing effect; at the same time, the scraper plate 7 at the bottom end of the second rotating shaft 4 can rotate and scrape up the solid material deposited at the bottom of the mixing tank 1 to fully mix the deposited material with other materials; after stirring for a period of time, the deposited material has gradually been mixed with other materials. At this time, there is no need to make the scraper plate 7 contact with the bottom of the mixing tank 1. At this time, the hydraulic rod 8 is retracted to move the scraper plate 7 upward to achieve the purpose of separation from the mixing tank 1. In this way, the friction between the scraper plate 7 and the bottom of the mixing tank 1 can be reduced, thereby reducing the degree of wear.

[0025] Through the coordinated action of the above-mentioned devices, the height of the scraper plate 7 can be adjusted to select whether to contact the bottom end of the deployment steel pipe according to actual needs, which makes the use more flexible.

[0026] Example 2

[0027] Since the material in Example 1 contains liquid material, it may splash into the gap between the first rotating shaft 3 and the second rotating shaft 4 during the feeding or stirring process, thereby causing material loss. Based on this, Figure 1-3 As shown, a connecting plate 12 is fixedly provided on the outside of the first rotating shaft 3, and a telescopic tube 13 is provided between the bottom end of the connecting plate 12 and the top end of the second rotating shaft 4. Furthermore, the telescopic tube 13 is a bellows and a hose (in the prior art, the bellows in this solution is a closed tube, which can ensure that the liquid material does not enter the gap between the first rotating shaft 3 and the second rotating shaft 4). Furthermore, in order to avoid the liquid material from splashing from bottom to top into the ball bearing 11 during stirring, which affects the performance of the ball bearing 11 (in the stirring process, the liquid material also contains solid material, and the solid material adheres to the ball bearing 11, which will cause the ball bearing 11 to rotate poorly) and cause material loss, as shown in FIG. Figure 1-3 As shown, a baffle 14 is sleeved on the outside of the second rotating shaft 4 and located between the limiting ring 5 and the stirring rod 6, and the vertical downward projection of the ball bearing 11 is located in the baffle 14. By setting the baffle 14, the splashed material can be blocked, and the baffle 14 will rotate synchronously with the second rotating shaft 4. Through the action of centrifugal force, the material splashed to the bottom end of the baffle 14 can be thrown out along the edge to avoid material waste. Preferably, in order to avoid liquid or solid material splashing into the ball bearing 11 during feeding, resulting in adverse effects on the performance of the ball bearing 11 or material loss, as shown in FIG. Figure 1-3 As shown, the vertical upward projection of the ball bearing 11 is located in the connecting plate 12. The connecting plate 12 can block the material during feeding, and the connecting plate 12 will rotate synchronously with the first rotating shaft 3. Through the action of centrifugal force, the material splashed to the top and bottom ends of the connecting plate 12 can be thrown out along the edge, avoiding the adverse effect of the material on the ball bearing 11 and avoiding material waste.

Claims

1. A lithium ion electrolyte stirring device, characterized in that, The invention comprises a motor (2) arranged at the top of a mixing tank (1), a first rotating shaft (3) vertically arranged in the mixing tank (1) and connected to the output end of the motor (2), a second rotating shaft (4) sleeved on the outside of the first rotating shaft (3) and capable of vertical displacement outside the first rotating shaft (3), a limiting ring (5) rotatably sleeved on the outside of the second rotating shaft (4), a plurality of stirring rods (6) arranged on the outside of the second rotating shaft (4), a scraper (7) arranged at the bottom end of the second rotating shaft (4), and a hydraulic rod (8) arranged on the top wall of the mixing tank (1) and driving the limiting ring (5) to move in the vertical direction.

2. A lithium ion electrolyte stirring device according to claim 1, characterized in that: The first rotating shaft (3) and the second rotating shaft (4) are adjacent to each other, one of which is provided with a plurality of vertical sliding grooves (9), and the other is provided with a sliding block (10) that is slidably engaged with the vertical sliding grooves (9).

3. A lithium ion electrolyte stirring device according to claim 1, characterized in that: A ball bearing (11) is provided between the limiting ring (5) and the second rotating shaft (4).

4. A lithium ion electrolyte stirring device according to claim 3, characterized in that: A connecting plate (12) is fixedly provided on the outside of the first rotating shaft (3), and a telescopic tube (13) is provided between the bottom end of the connecting plate (12) and the top end of the second rotating shaft (4).

5. A lithium ion electrolyte stirring device according to claim 4, characterized in that: The telescopic tube (13) is a bellows.

6. A lithium ion electrolyte stirring device according to claim 3, characterized in that: A baffle (14) is sleeved outside the second rotating shaft (4) and between the limiting ring (5) and the stirring rod (6), and a vertical downward projection of the ball bearing (11) is located inside the baffle (14).

7. A lithium ion electrolyte stirring device according to claim 4, characterized in that: The vertical upward projection of the ball bearing (11) is located inside the connecting plate (12).

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