A high-efficiency grinding device for lithium iron phosphate powder

Abstract

This utility model discloses a high-efficiency grinding device for lithium iron phosphate powder, belonging to the technical field of grinding devices. It includes a grinding cylinder, with an upper screen fixedly fitted inside the cylinder's cavity. The upper screen has upper sieve holes. A middle screen is fixedly fitted inside the cylinder's cavity, with middle sieve holes. A lower screen is fixedly fitted inside the cylinder's cavity, with lower sieve holes. A servo motor is fixedly mounted on the top surface of the grinding cylinder. In this utility model, the servo motor drives a rotating rod to rotate, which in turn drives three grinding rollers to roll sequentially on the top surfaces of the upper, middle, and lower screens. This allows for efficient grinding of the lithium iron phosphate powder on the upper, middle, and lower screens using the three grinding rollers. Simultaneously, the grinding rollers can grind all the lithium iron phosphate powder on the top surfaces of the upper, middle, and lower screens.

Description

Technical Field

[0001] This utility model relates to the field of grinding equipment technology, and more specifically, to a high-efficiency grinding device for lithium iron phosphate powder. Background Technology

[0002] Lithium iron phosphate (LFP) is a compound commonly used in the cathode material of lithium-ion batteries. It is widely used due to its high safety, long cycle life, and non-toxic and environmentally friendly properties. During the production of LFP, the lithium iron phosphate needs to be ground to ensure a uniform particle size distribution, thereby improving battery performance.

[0003] A search revealed that utility model patent CN221245538U discloses a multi-stage grinding device, comprising: a grinding cylinder for holding raw materials to be ground; a rotating shaft housed within the grinding cylinder and rotatably connected to it; multiple partitions located within the grinding cylinder, dividing it into multiple grinding chambers from top to bottom; multiple grinding tools fixedly connected to the rotating shaft and located within the multiple grinding chambers; and multiple sieve plates respectively disposed on the partitions, each sieve plate having sieve holes. The raw materials to be ground can be ground sequentially from top to bottom within the grinding cylinder in the multiple grinding chambers, and can simultaneously fall through the sieve holes to the lower sieve holes. This multi-stage grinding device, employing multiple grinding chambers for simultaneous grinding and screening, improves grinding efficiency, resulting in more uniform lithium iron phosphate particles and superior performance of the lithium iron phosphate product. However, the above patent still has the following shortcomings: Although lithium iron phosphate can be ground multiple times by multiple grinding tools, it is not easy to ensure that the material placed on the partition plate enters between the grinding tool and the sieve plate, which affects the grinding efficiency. In addition, the ground powder falls by its own weight, which makes it difficult for the ground powder to fall through the sieve plate. Therefore, we propose a high-efficiency grinding device for lithium iron phosphate powder. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of this utility model is to provide a high-efficiency grinding device for lithium iron phosphate powder.

[0005] To solve the above problems, the present invention adopts the following technical solution:

[0006] A high-efficiency grinding device for lithium iron phosphate powder includes a grinding cylinder. An upper screen with upper sieve holes is fixedly fitted inside the inner cavity of the grinding cylinder. A middle screen with middle sieve holes is fixedly fitted inside the inner cavity of the grinding cylinder. A lower screen with lower sieve holes is fixedly fitted inside the inner cavity of the grinding cylinder. A servo motor is fixedly mounted on the top surface of the grinding cylinder. The output shaft of the servo motor extends into the inner cavity of the grinding cylinder and is fixedly connected to a rotating rod via a coupling. The rotating rod passes through the middle of the upper screen, the middle screen, and the middle sieve holes. Multiple striking mechanisms are provided on the side of the rotating rod. Three grinding rollers are rotatably connected to the side of the rotating rod. The bottom surfaces of the three grinding rollers are in contact with the top surfaces of the upper screen, the middle screen, and the lower screen, respectively. A striking plate is fixedly connected to the bottom surfaces of the upper screen, the middle screen, and the lower screen.

[0007] In a preferred embodiment of this utility model, the striking mechanism includes a support spring fixedly connected to the side of the rotating rod, and a striking column fixedly connected to the end of the support spring, the height of the striking column being the same as the height of the striking plate.

[0008] As a preferred embodiment of this utility model, three scrapers are fixedly connected to the side of the rotating rod, and the bottom surfaces of the three scrapers are respectively in contact with the top surfaces of the upper screen, the middle screen and the lower screen.

[0009] As a preferred embodiment of this utility model, a material injection pipe is fixedly sleeved on the top of the grinding cylinder, and a powder discharge pipe is fixedly sleeved on the bottom of the grinding cylinder.

[0010] As a preferred embodiment of this utility model, a control panel is fixedly installed on the front of the grinding cylinder, and the control panel is electrically connected to the servo motor.

[0011] As a preferred embodiment of this utility model, the bottom surface of the grinding cylinder is fixedly connected with multiple support feet.

[0012] Compared with existing technologies, the advantages of this utility model are:

[0013] (1) In this utility model, a servo motor drives a rotating rod to rotate, and the rotating rod drives three grinding rollers to roll sequentially on the top surface of the upper screen, middle screen and lower screen. Thus, the three grinding rollers are used to efficiently grind the lithium iron phosphate on the upper screen, middle screen and lower screen. At the same time, the grinding rollers can grind all the lithium iron phosphate on the top surface of the upper screen, middle screen and lower screen.

[0014] (2) In this utility model, when the rotating rod rotates, it drives the supporting spring and the striking column to rotate synchronously. The striking column strikes the striking plate at the bottom of the upper screen, middle screen and lower screen so that the upper screen, middle screen and lower screen will vibrate to a certain extent, ensuring that the lithium iron phosphate powder on the upper screen, middle screen and lower screen can pass through the upper screen hole, middle screen hole and lower screen hole smoothly and be screened down, thereby improving the working quality of the lithium iron phosphate powder high-efficiency grinding device. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic cross-sectional view of the present invention;

[0017] Figure 3 This is a cross-sectional schematic diagram of the grinding cylinder of this utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the hammering column of this utility model.

[0019] Explanation of the labels in the diagram:

[0020] 1. Grinding cylinder; 2. Upper screen; 3. Upper screen hole; 4. Middle screen; 5. Middle screen hole; 6. Lower screen; 7. Lower screen hole; 8. Servo motor; 9. Rotating rod; 10. Grinding roller; 11. Beating plate; 12. Scraper; 13. Support spring; 14. Beating column; 15. Feeding pipe; 16. Powder discharge pipe; 17. Support foot; 18. Control panel; 19. Beating mechanism. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0022] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] Example:

[0025] Please see Figure 1-4 A high-efficiency grinding device for lithium iron phosphate powder includes a grinding cylinder 1. An upper screen 2 is fixedly sleeved inside the grinding cylinder 1, and the upper screen 2 is provided with upper screen holes 3. A middle screen 4 is fixedly sleeved inside the grinding cylinder 1, and the middle screen 4 is provided with middle screen holes 5. A lower screen 6 is fixedly sleeved inside the grinding cylinder 1, and the lower screen 6 is provided with lower screen holes 7. A servo motor 8 is fixedly installed on the top surface of the grinding cylinder 1. The output shaft of the servo motor 8 extends into the inner cavity of the grinding cylinder 1 and is fixedly connected to a rotating rod 9 through a coupling. The rotating rod 9 passes through the middle of the upper screen 2, the middle screen 4 and the middle screen hole 5 respectively. Multiple striking mechanisms 19 are provided on the side of the rotating rod 9. Three grinding rollers 10 are rotatably connected to the side of the rotating rod 9. The bottom surfaces of the three grinding rollers 10 are in contact with the top surfaces of the upper screen 2, the middle screen 4 and the lower screen 6 respectively. A striking plate 11 is fixedly connected to the bottom surfaces of the upper screen 2, the middle screen 4 and the lower screen 6.

[0026] In this embodiment, the inner diameters of the upper sieve hole 3, the middle sieve hole 5, and the lower sieve hole 7 gradually decrease to facilitate the stepwise sieving of lithium iron phosphate powder.

[0027] For details, please refer to Figures 2 to 4 The striking mechanism 19 includes a support spring 13 fixedly connected to the side of the rotating rod 9, and a striking column 14 fixedly connected to the end of the support spring 13. The height of the striking column 14 is the same as the height of the striking plate 11.

[0028] In this embodiment, the end of the striking column 14 is a rounded head, and the bottom of the striking plate 11 is a rounded corner.

[0029] For details, please refer to Figure 2 and Figure 3 Three scrapers 12 are fixedly connected to the side of the rotating rod 9. The bottom surfaces of the three scrapers 12 are respectively attached to the top surfaces of the upper screen 2, the middle screen 4 and the lower screen 6.

[0030] In this embodiment, three scrapers 12 are used to turn over the lithium iron phosphate on the top of the upper screen 2, middle screen 4 and lower screen 6 to ensure uniform grinding of the lithium iron phosphate.

[0031] For details, please refer to Figure 1 The top of the grinding cylinder 1 is fixedly fitted with a feeding pipe 15, and the bottom of the grinding cylinder 1 is fixedly fitted with a powder discharge pipe 16.

[0032] In this embodiment, the lithium iron phosphate to be ground is put into the inner cavity of the grinding cylinder 1 through the injection pipe 15, and the ground lithium iron phosphate powder is discharged through the powder discharge pipe 16.

[0033] For details, please refer to Figure 1 A control panel 18 is fixedly installed on the front of the grinding cylinder 1, and the control panel 18 is electrically connected to the servo motor 8.

[0034] In this embodiment, the servo motor 8 is controlled by the control panel 18, and the servo motor 8 and the control panel 18 are powered by the power supply of the peripheral device.

[0035] For details, please refer to Figure 1 The bottom surface of the grinding cylinder 1 is fixedly connected with multiple support feet 17.

[0036] In this embodiment, multiple support feet 17 are used to support the grinding cylinder 1.

[0037] Working principle: In use, firstly, the servo motor 8 is started to drive the rotating rod 9 to rotate. The rotating rod 9 drives the three grinding rollers 10 to rotate on top of the upper screen 2, middle screen 4, and lower screen 6. At the same time, the rotating rod 9 drives the three scrapers 12 and three striking mechanisms 19 to rotate. Then, lithium iron phosphate is put into the inner cavity of the grinding cylinder 1 through the injection pipe 15, so that the grinding rollers 10 grind the lithium iron phosphate on the upper screen 2. The ground lithium iron phosphate falls through the upper screen hole 3 onto the middle screen 4, so that the grinding rollers 10 on the middle screen 4 can grind the lithium iron phosphate again. The ground lithium iron phosphate falls through the middle screen hole 5 onto the lower screen 6. The grinding roller 10 on the screen 6 grinds the lithium iron phosphate again so that the final lithium iron phosphate powder falls from the lower screen hole 7 and is discharged from the powder discharge pipe 16. Then, the scraper 12 scrapes the lithium iron phosphate on the upper screen 2, middle screen 4 and lower screen 6, thereby turning the lithium iron phosphate and ensuring that the grinding roller 10 effectively grinds the lithium iron phosphate. Finally, the striking column 14 at the end of the support spring 13 strikes the striking plate 11 so that the upper screen 2, middle screen 4 and lower screen 6 vibrate, so that the lithium iron phosphate on the upper screen 2, middle screen 4 and lower screen 6 can fall smoothly from the upper screen hole 3, middle screen hole 5 and lower screen hole 7.

[0038] 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 its improved concept should be covered within the protection scope of the present utility model.

Claims

1. A high efficiency grinding device for lithium iron phosphate powder comprising a grinding cylinder (1), characterized in that: An upper screen (2) is fixedly fitted into the inner cavity of the grinding cylinder (1), and the upper screen (2) is provided with upper screen holes (3). A middle screen (4) is fixedly fitted into the inner cavity of the grinding cylinder (1), and the middle screen (4) is provided with middle screen holes (5). A lower screen (6) is fixedly fitted into the inner cavity of the grinding cylinder (1), and the lower screen (6) is provided with lower screen holes (7). A servo motor (8) is fixedly installed on the top surface of the grinding cylinder (1), and the output shaft of the servo motor (8) extends into the inner cavity of the grinding cylinder (1) and is connected to a coupling. A rotating rod (9) is fixedly connected to the middle of the upper screen (2), the middle screen (4) and the middle screen hole (5). Multiple striking mechanisms (19) are provided on the side of the rotating rod (9). Three grinding rollers (10) are rotatably connected to the side of the rotating rod (9). The bottom surfaces of the three grinding rollers (10) are in contact with the top surfaces of the upper screen (2), the middle screen (4) and the lower screen (6). A striking plate (11) is fixedly connected to the bottom surfaces of the upper screen (2), the middle screen (4) and the lower screen (6).

2. The high efficiency grinding device of lithium iron phosphate powder according to claim 1, characterized in that: The striking mechanism (19) includes a support spring (13) fixedly connected to the side of the rotating rod (9), and a striking column (14) fixedly connected to the end of the support spring (13). The height of the striking column (14) is the same as the height of the striking plate (11).

3. The high efficiency grinding device of lithium iron phosphate powder according to claim 1, wherein: Three scrapers (12) are fixedly connected to the side of the rotating rod (9), and the bottom surfaces of the three scrapers (12) are respectively attached to the top surfaces of the upper screen (2), the middle screen (4) and the lower screen (6).

4. The high efficiency grinding device of lithium iron phosphate powder according to claim 1, wherein: The top of the grinding cylinder (1) is fixedly fitted with a material injection pipe (15), and the bottom of the grinding cylinder (1) is fixedly fitted with a powder discharge pipe (16).

5. The high-efficiency grinding device for lithium iron phosphate powder according to claim 1, characterized in that: A control panel (18) is fixedly installed on the front of the grinding cylinder (1), and the control panel (18) is electrically connected to the servo motor (8).

6. The high efficiency grinding device of lithium iron phosphate powder according to claim 1, wherein: The bottom surface of the grinding cylinder (1) is fixedly connected with multiple support feet (17).

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