Lithium iron phosphate precursor grinding device

Abstract

The utility model provides a lithium iron phosphate precursor grinding device which comprises a grinding chamber, and a plurality of pickaxe beads are placed in the grinding chamber and used for grinding a lithium iron phosphate precursor. A circular hole is formed in the lower part of the grinding chamber and is used for mounting a feeding device; the top of the grinding chamber is fixedly connected with the top cover, and a round hole is formed in the center of the top cover and used for installing the discharging device. The whole grinding chamber is cylindrical, the top of the grinding chamber is shrunk inwards, the inner wall of the grinding chamber is in a certain arc shape, the surface of the arc-shaped inner wall is smooth, materials can be sucked out conveniently, the pickaxe beads are pure zirconium oxide beads with the pickaxe content larger than or equal to 95%, and the diameter of each pickaxe bead is 1 mm. Through the mode of feeding from the lower portion, grinding in the middle and discharging from the upper portion, the situation that a filter screen of a discharging port is blocked due to discharging from the lower portion in a traditional tool is effectively prevented, the suction device is adopted for collecting the ground materials, and small particles of the materials can be effectively prevented from flying.

Description

Technical Field

[0001] This specification relates to the field of lithium iron phosphate battery technology, and more particularly to a lithium iron phosphate precursor grinding apparatus. Background Technology

[0002] The precursor of lithium iron phosphate is iron phosphate, with the molecular formula FePO4. Iron phosphate is a salt produced from iron and phosphorus sources. As an important precursor of lithium iron phosphate, a cathode material for new energy, its specifications and performance indicators have a significant impact on the performance of downstream lithium iron phosphate products.

[0003] The existing technology includes Chinese utility model patent application number 202321244843, titled "A Multi-stage Grinding Equipment for Lithium Iron Phosphate Precursor," which describes that "by setting up two-stage grinding and filtration, the grinding efficiency and uniformity of the precursor are effectively improved; the addition of a detachable dual filtration unit between the first-stage and second-stage grinding effectively intercepts zirconium balls and foreign objects mixed in the precursor; this utility model is simple to operate and has a low manufacturing cost." However, the different filtration units described therein use screens with different aperture sizes, the screen area is small, and the plane on which the screen is located is not conducive to materials with the required diameter passing through the screen and entering the next stage of grinding. In the actual grinding process, this may cause screen blockage, thereby affecting the grinding effect. Utility Model Content

[0004] In view of this, the purpose of this utility model is to propose a lithium iron phosphate precursor grinding device to solve the problem of screen clogging in the prior art.

[0005] To achieve the above objectives, this utility model provides a lithium iron phosphate precursor grinding device, including a grinding chamber, wherein a plurality of pick beads are placed inside the grinding chamber for grinding lithium iron phosphate precursors.

[0006] A high-speed vibratory machine is fixedly installed outside the grinding chamber to drive the internal pick beads to make irregular movements and grind the internal materials.

[0007] A circular hole is provided at the bottom of the grinding chamber for installing a feeding device;

[0008] The top of the grinding chamber is fixedly connected to the top cover, and a round hole is opened in the center of the top cover for installing the discharge device;

[0009] The bottom of the grinding chamber is fixedly connected to the bracket by bolts.

[0010] Preferably, the grinding chamber is cylindrical in shape, with the top of the grinding chamber tapering inward and the inner wall having a certain arc shape, which facilitates the material being sucked out.

[0011] Preferably, the feeding device includes a feed inlet, which is connected to the interior of the grinding chamber via a flexible hose. A suction device is installed at the feed inlet to facilitate the material being suctioned from the feed inlet into the interior of the grinding chamber.

[0012] Preferably, the discharge device includes an output pipe, one end of which is fixedly connected to the grinding chamber by a thread, and the other end is fixedly connected to the discharge port. The discharge port is shaped like a shower head, which facilitates the delivery of a large amount of material from the output pipe. A suction device is installed inside the discharge port to suck out the ground material.

[0013] Preferably, the zirconia beads are pure zirconia beads with a zirconia content of ≥95% and a diameter of 1mm.

[0014] Preferably, a filter screen is fixedly connected to the inlet of the output pipe to filter out lithium iron phosphate precursors that do not meet the specifications.

[0015] As can be seen from the above, the lithium iron phosphate precursor grinding device provided by this utility model effectively prevents the clogging of the discharge port filter caused by the bottom discharge in traditional tools by setting the bottom feeding, middle grinding and top discharge method, and the use of a suction device to collect the ground material can effectively prevent small particles of material from flying away. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in one or more embodiments of this specification or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only one or more embodiments of this specification. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a right view of the present invention;

[0019] Figure 3 This is a cross-sectional view of the present invention;

[0020] Figure 4 This is a front view of the present invention;

[0021] Figure 5 This is a cross-sectional view of the present invention.

[0022] In the diagram: 1. Feed inlet; 2. Support frame; 3. Grinding chamber; 4. Top cover; 5. Discharge outlet; 6. Output pipe; 7. High-speed vibrator; 8. Filter screen; 9. Grinding beads. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0024] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms "first," "second," and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0025] Example 1:

[0026] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, a lithium iron phosphate precursor grinding apparatus is provided, including a grinding chamber 3, wherein a plurality of pick beads 9 are placed inside the grinding chamber 3 for grinding the lithium iron phosphate precursor;

[0027] The grinding chamber 3 is externally fixedly equipped with a high-speed vibrator 7, which drives the internal pick beads 9 to perform high-speed irregular motion to grind the internal materials.

[0028] The grinding chamber 3 has a circular hole at the bottom for installing a feeding device;

[0029] The top of the grinding chamber 3 is fixedly connected to the top cover 4, and a round hole is opened in the center of the top cover 4 for installing the discharge device;

[0030] The bottom of the grinding chamber 3 is fixedly connected to the bracket 2 by bolts.

[0031] The grinding chamber 3 is cylindrical in shape, with the top of the grinding chamber 3 tapering inward and the inner wall having a certain arc shape. The surface of the arc-shaped inner wall is smooth, which makes it less likely for lithium iron phosphate precursor powder to accumulate and clog at the corner of the inner wall, and facilitates the material to be sucked out.

[0032] The zirconia bead 9 is a pure zirconia bead with a zirconia content of ≥95% and a diameter of 1mm.

[0033] Example 2:

[0034] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, a lithium iron phosphate precursor grinding apparatus is provided, including a grinding chamber 3, wherein a plurality of pick beads 9 are placed inside the grinding chamber 3 for grinding the lithium iron phosphate precursor;

[0035] The grinding chamber 3 is externally fixedly equipped with a high-speed vibrator 7, which drives the internal pick beads 9 to perform high-speed irregular motion to grind the internal materials.

[0036] The grinding chamber 3 has a circular hole at the bottom for installing a feeding device;

[0037] The top of the grinding chamber 3 is fixedly connected to the top cover 4, and a round hole is opened in the center of the top cover 4 for installing the discharge device;

[0038] The bottom of the grinding chamber 3 is fixedly connected to the bracket 2 by bolts.

[0039] The feeding device includes a feeding port 1;

[0040] The feed inlet 1 is connected to the inside of the grinding chamber 3 via a flexible hose;

[0041] The feed inlet 1 is equipped with a suction device to facilitate the material being delivered from the feed inlet 1 into the grinding chamber 3 by suction.

[0042] The zirconia bead 9 is a pure zirconia bead with a zirconia content of ≥95% and a diameter of 1mm.

[0043] Example 3:

[0044] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, a lithium iron phosphate precursor grinding apparatus is provided, including a grinding chamber 3, wherein a plurality of pick beads 9 are placed inside the grinding chamber 3 for grinding the lithium iron phosphate precursor;

[0045] The grinding chamber 3 is externally fixedly equipped with a high-speed vibrator 7, which drives the internal pick beads 9 to perform high-speed irregular motion to grind the internal materials.

[0046] The grinding chamber 3 has a circular hole at the bottom for installing a feeding device;

[0047] The top of the grinding chamber 3 is fixedly connected to the top cover 4, and a round hole is opened in the center of the top cover 4 for installing the discharge device;

[0048] The bottom of the grinding chamber 3 is fixedly connected to the bracket 2 by bolts.

[0049] The grinding chamber 3 is cylindrical in shape, with the top of the grinding chamber 3 tapering inward and the inner wall having a certain arc shape. The surface of the arc-shaped inner wall is smooth, which makes it less likely for lithium iron phosphate precursor powder to accumulate and clog at the corner of the inner wall, and facilitates the material to be sucked out.

[0050] The discharge device includes an output pipe 6, one end of which is fixedly connected to the grinding chamber 3 by a thread, and the other end is fixedly connected to the discharge port 5.

[0051] Among them, a rubber ring is fixedly installed at the connection between the output pipe 6 and the grinding chamber 3 to maintain the sealing state of the connection and prevent the grinding lithium iron phosphate precursor powder from leaking out from the gap.

[0052] Among them, the discharge port 5 is shaped like a shower head, which facilitates the conveying of a large amount of material from the output pipe 6;

[0053] The discharge port 5 is equipped with a suction device to suck out the ground material.

[0054] The filter screen 8 is fixedly connected to the inlet of the output pipe 6 to filter out lithium iron phosphate precursors that do not meet the specifications.

[0055] The pore size of filter 8 can be selected and replaced according to actual needs.

[0056] Working principle: Place the lithium iron phosphate precursor material to be ground at the feed inlet 1, start the machine, and the material is sucked into the grinding chamber 3. The high-speed vibration device is turned on, which drives the grinding balls inside the grinding chamber to make irregular high-speed movements continuously, constantly contacting the material inside the grinding chamber and grinding it into smaller particles. The material outlet is set above the grinding chamber 3. The ground microparticles are located in the upper part of the grinding chamber 3. After passing through the filter screen, they are sucked to the discharge outlet 5 along the output pipe. A packaging bag is placed at the discharge outlet to collect the ground material.

[0057] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of this disclosure (including the claims) is limited to these examples; within the scope of this invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of this invention as described above, which are not provided in the details for the sake of brevity.

[0058] The embodiments of this utility model are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A grinding apparatus for lithium iron phosphate precursors, comprising a grinding chamber (3), characterized in that: The grinding chamber (3) contains several pick beads (9) for grinding lithium iron phosphate precursors; A high-speed vibrator (7) is fixedly installed outside the grinding chamber (3) to drive the internal picks (9) to make irregular movements and grind the internal materials. The grinding chamber (3) has a round hole at the bottom for installing a feeding device; The top of the grinding chamber (3) is fixedly connected to the top cover (4), and a round hole is opened in the center of the top cover (4) for installing the discharge device; The bottom of the grinding chamber (3) is fixedly connected to the bracket (2) by bolts.

2. The lithium iron phosphate precursor grinding apparatus according to claim 1, characterized in that, The grinding chamber (3) is cylindrical in shape, with the top of the grinding chamber (3) tapering inward and the inner wall having a certain arc shape, which facilitates the material being sucked out.

3. The lithium iron phosphate precursor grinding apparatus according to claim 1, characterized in that, The feeding device includes a feed inlet (1); The feed inlet (1) is connected to the inside of the grinding chamber (3) via a hose. A suction device is installed in the feed inlet (1) to facilitate the material to be delivered from the feed inlet (1) to the inside of the grinding chamber (3) by suction.

4. The lithium iron phosphate precursor grinding apparatus according to claim 1, characterized in that, The discharge device includes an output pipe (6), one end of which is fixedly connected to the grinding chamber (3) by a thread, and the other end is fixedly connected to the discharge port (5); The discharge port (5) is shaped like a shower head, which facilitates the conveying of a large amount of material from the output pipe (6); The discharge port (5) is equipped with a suction device to suck out the ground material.

5. The lithium iron phosphate precursor grinding apparatus according to claim 1, characterized in that, The zirconia beads (9) are pure zirconia beads with a zirconia content of ≥95% and a diameter of 1 mm.

6. The lithium iron phosphate precursor grinding apparatus according to claim 4, characterized in that, The output pipe (6) is fixedly connected to a filter screen (8) at the suction port, which is used to filter out non-compliant lithium iron phosphate precursors.

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