Grinding device for lithium battery graphite negative electrode material production

Abstract

The utility model provides a grinding device for lithium battery graphite negative electrode material production, and relates to the technical field of lithium battery graphite negative electrode material processing, the grinding device comprises a grinding box, the top of the grinding box is fixedly provided with a feeding end, the bottom of the grinding box is provided with a discharging end opening, the bottom of the grinding box is fixedly provided with symmetrically distributed supporting frames, and the supporting frames are fixedly provided with a discharging end opening; through grooves are formed in the upper portions of the front face and the back face of the grinding box correspondingly. The first servo motor drives the worm to be meshed with the worm gear, the two-way lead screw is driven to rotate, the two grinding rollers fixedly connected with the adjusting base are forced to synchronously move in the same direction or in the opposite directions along the guide rails, and online precise adjustment of the working gap of the two grinding rollers is achieved. The equipment can flexibly adapt to lithium battery graphite negative electrode raw materials with different hardness and initial particle sizes, the grinding effect is effectively optimized and the consistency of product particle sizes is improved by accurately controlling the grinding strength, and the process adaptability of the equipment is remarkably enhanced.

Description

TECHNICAL FIELD

[0001] The utility model relates to lithium battery graphite negative material processing technical field, specifically, relate to a kind of powder grinding device for lithium battery graphite negative material production. BACKGROUND

[0002] With the rapid development of global new energy vehicles, energy storage systems and portable electronic devices, lithium batteries as the core power and energy storage carrier, its market demand continues to grow explosively. As a key component of lithium batteries, negative materials directly affect the energy density, cycle life and fast charging performance of the battery. Currently, artificial graphite and natural graphite dominate the negative material market due to their stable electrochemical performance, abundant reserves and low cost. However, the electrochemical performance of graphite negative materials is closely related to its microstructure, especially the particle size distribution, morphology (sphericity, lamellar structure) and surface properties. These factors deeply affect the lithium ion insertion / extraction kinetics, first charge / discharge efficiency and electrode compaction density.

[0003] For example: Chinese utility model patent (publication number: CN217016762U) discloses "a lithium battery graphite negative material multi-powder grinding device", the specification discloses: by installing powder grinding device, screening device, pushing device and reciprocating device, ensure lithium battery graphite negative material powder grinding device, not only powder grinding effect is enough ideal, at the same time, powder grinding efficiency is high, ensure that lithium battery graphite negative material powder grinding particle meets the standard, speed up the production speed of lithium battery graphite negative material;

[0004] For the above-mentioned related technology, the device has some shortcomings. In actual use, the fixed gap grinding roller works, and the crushing strength cannot be adjusted according to the hardness and initial particle size of the raw material, which may lead to over-crushing (producing unnecessary superfine powder, affecting battery performance) or insufficient crushing.

[0005] Therefore, we improve it and propose a kind of powder grinding device for lithium battery graphite negative material production. UTILITY MODEL CONTENTS

[0006] To solve the problems raised in the above background art, the utility model provides a powder grinding device for lithium battery graphite negative material production.

[0007] To achieve the above purpose, the utility model provides the following technical solutions:

[0008] The utility model provides a kind of powder grinding device for lithium battery graphite negative electrode material production, it includes powder grinding box, the top of the powder grinding box is fixedly installed with feed end, the bottom of the powder grinding box is opened with discharge port, the bottom of the powder grinding box is fixedly installed with the support frame of symmetrical distribution, the top of the front and back of the powder grinding box is opened with through slot, the front and back of the powder grinding box is fixedly installed with the drive box corresponding with the position of through slot above, the inside of the drive box is provided with adjusting assembly;

[0009] The adjusting assembly includes a bidirectional screw rod rotatably mounted inside the drive box, a guide rail fixedly installed at the top of the drive box, a symmetrical adjusting seat sleeved on the outer wall of each bidirectional screw rod, the adjusting seat slidably mounted on the guide rail, a grinding roller rotatably mounted between the two adjusting seats on the same side of the powder grinding box, the grinding roller penetrating the through slot and located below the feed end inside the powder grinding box, a second servo motor fixedly installed on the front of one adjusting seat, the drive end of the second servo motor penetrating the adjusting seat and fixedly connected with the front end of the grinding roller, a protective cover fixedly installed above one side of the outer surface of the powder grinding box, and a drive assembly provided inside the protective cover.

[0010] As a preferred technical solution of the present application, the drive assembly includes a worm rotatably mounted inside the protective cover, one end of each bidirectional screw rod penetrating the drive box and extending into the interior of the protective cover, a worm gear fixedly installed on one end of each bidirectional screw rod, the worm gear meshing with the worm, a first servo motor fixedly installed on the front of the protective cover, the drive end of the first servo motor penetrating the protective cover and extending into the interior of the protective cover, and the drive end of the first servo motor fixedly connected with the front end of the worm.

[0011] As a preferred technical solution of the present application, a discharge port is opened below the other side of the outer surface of the powder grinding box, a slot is opened below the front of the powder grinding box, a screen is slidably inserted into the slot, a sealing plate is fixedly installed on the front end of the screen, and the sealing plate is fixedly connected with the front of the powder grinding box by bolts.

[0012] As a preferred technical solution of the present application, the screen is obliquely arranged inside the powder grinding box through the slot, and the position of the screen corresponds to the discharge port.

[0013] As a preferred technical solution of the present application, a guide plate is fixedly installed above the screen inside the powder grinding box.

[0014] As a preferred technical solution of the present application, a heat dissipation window is opened on the front of one drive box, and a filter screen is fixedly installed inside the heat dissipation window.

[0015] As a preferred technical scheme of the present application, the adjusting seat is provided with a threaded hole matched with the bidirectional screw rod, and the adjusting seat is threadedly connected with the bidirectional screw rod through the threaded hole.

[0016] As a preferred technical scheme of the present application, the top of the adjusting seat is provided with a sliding groove matched with the guide rail, and the adjusting seat is slidingly connected with the guide rail through the sliding groove.

[0017] Compared with the prior art, the present application has the following beneficial effects:

[0018] In the scheme of the present application:

[0019] 1. The cooperation of the grinding box, the feeding end, the support frame, the driving box, the protective cover, the first servo motor, the guide rail, the adjusting seat, the grinding roller, the bidirectional screw rod, the second servo motor, the worm, the through slot and the worm gear is used, the first servo motor drives the worm to engage with the worm gear, drives the bidirectional screw rod to rotate, forces the two grinding rollers fixedly connected with the adjusting seat to move synchronously towards or reversely along the guide rail, and realizes the online precise adjustment of the working gap of the two grinding rollers. The device can flexibly adapt to lithium battery graphite negative electrode raw materials with different hardness and initial particle size, the crushing intensity is accurately controlled, the grinding effect is effectively optimized, the consistency of product particle size is improved, and the process adaptability of the device is significantly enhanced.

[0020] 2. The cooperation of the discharge port, the sealing plate, the discharge port, the slot, the screen and the guide plate is used, the material is uniformly guided to the high end of the inclined screen by the guide plate, dynamic screening is carried out by rolling of the material, rapid separation of qualified fine powder and automatic discharge of coarse particles are realized, and the consistency of product particle size is effectively ensured. The screen adopts a front plug-in design, different specifications of screens can be conveniently replaced or cleaning and maintenance can be carried out by disassembling the sealing plate, and the adaptability of the device to different process requirements and the convenience of operation and maintenance are greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 A three-dimensional structural schematic view of a grinding device for lithium battery graphite negative electrode material production is provided in the present application;

[0022] Figure 2 A bottom view structural schematic view of a grinding device for lithium battery graphite negative electrode material production is provided in the present application;

[0023] Figure 3 A sectional view structural schematic view of a grinding device for lithium battery graphite negative electrode material production is provided in the present application;

[0024] Figure 4 An internal structure schematic view of a grinding box in a grinding device for lithium battery graphite negative electrode material production is provided in the present application;

[0025] Figure 5 A position structure diagram of a through slot and a grinding roller in a lithium battery graphite negative electrode material production grinding device is provided.

[0026] Indicated in the figure:

[0027] 1, grinding box; 2, feed end; 3, support frame; 4, discharge port; 5, drive box; 6, protective cover; 7, first servo motor; 8, heat dissipation window; 9, sealing plate; 10, discharge port; 11, guide rail; 12, adjusting seat; 13, grinding roller; 14, bidirectional screw; 15, second servo motor; 16, slot; 17, screen; 18, worm; 19, guide plate; 20, through slot; 21, worm gear. DETAILED DESCRIPTION

[0028] In order to make the person skilled in the art better understand the technical scheme of the present application, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor shall belong to the scope of protection of the present application.

[0029] In order to make the person skilled in the art better understand the technical scheme of the present application, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor shall belong to the scope of protection of the present application.

[0030] It should be noted that the embodiments and features and technical solutions in the embodiments in the present application can be combined with each other without conflict.

[0031] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0032] Embodiment 1

[0033] Please refer to Figures 1-5 A lithium battery graphite negative electrode material production grinding device, which comprises a grinding box 1, a feed end 2 is fixedly installed on the top of the grinding box 1, a discharge port 10 is formed in the bottom of the grinding box 1, symmetrical support frames 3 are fixedly installed on the bottom of the grinding box 1, through slots 20 are formed in the upper parts of the front and back of the grinding box 1, drive boxes 5 corresponding to the positions of the through slots 20 are fixedly installed on the upper parts of the front and back of the grinding box 1, and adjusting assemblies are arranged in the drive boxes 5;

[0034] The adjusting assembly comprises two bidirectional screw rods 14 rotatably installed below the inside of the drive box 5, a guide rail 11 fixedly installed at the top of the inside of the drive box 5, and two adjusting seats 12 symmetrically sleeved on the outer walls of the two bidirectional screw rods 14, the adjusting seats 12 being slidably installed on the guide rail 11, one grinding roller 13 being rotatably installed between the two adjusting seats 12 located at the same side of the pulverizing box 1, the grinding roller 13 penetrating through the through slot 20 and being located below the inside of the feeding end 2 of the pulverizing box 1, a second servo motor 15 being fixedly installed on the front face of one adjusting seat 12, the driving end of the second servo motor 15 penetrating through the adjusting seat 12 and being fixedly connected with the front end of the grinding roller 13, a protective cover 6 being fixedly installed above one side of the outer surface of the pulverizing box 1, and the inside of the protective cover 6 being provided with a driving assembly.

[0035] Further, the driving assembly comprises a worm 18 rotatably installed in the inside of the protective cover 6, one end of each of the two bidirectional screw rods 14 penetrating through the drive box 5 and extending into the inside of the protective cover 6, a worm wheel 21 fixedly installed on one end of each of the two bidirectional screw rods 14, the worm wheel 21 being engaged with the worm 18, a first servo motor 7 fixedly installed on the front face of the protective cover 6, the driving end of the first servo motor 7 penetrating through the protective cover 6 and extending into the inside of the protective cover 6, and the driving end of the first servo motor 7 being fixedly connected with the front end of the worm 18.

[0036] Further, a heat dissipation window 8 is formed on the front face of one drive box 5, and a filter screen is fixedly installed in the inside of the heat dissipation window 8. The filter screen can allow air to flow and dissipate the heat generated by the driving elements such as the second servo motor 15 while effectively preventing external dust and foreign matters from entering the inside of the box, thereby significantly improving the environmental adaptability and operation reliability of the driving system while ensuring the heat dissipation performance of the key components and maintaining the working efficiency and service life thereof.

[0037] Further, a threaded hole matched with the bidirectional screw rod 14 is formed on the adjusting seat 12, and the adjusting seat 12 is threadedly connected with the bidirectional screw rod 14 through the threaded hole formed thereon. The rotational movement of the screw rod is accurately converted into the linear displacement of the adjusting seat 12, thereby realizing the synchronous, reverse and equidistant micro-adjustment of the gap between the two grinding rollers 13.

[0038] Further, a sliding groove matched with the guide rail 11 is formed on the top of the adjusting seat 12, and the adjusting seat 12 is slidably connected with the guide rail 11 through the sliding groove formed on the top thereof. The sliding groove provides high rigidity for the guiding and restraining of the linear movement of the adjusting seat 12, thereby ensuring that the two grinding rollers 13 always maintain strict axial alignment and parallelism during the gap adjustment, and thereby ensuring the accuracy of the pulverizing gap and the stability of the pulverizing effect.

[0039] Embodiment 2

[0040] Further optimize the powder grinding device for lithium battery graphite negative electrode material production provided in embodiment 1, specifically, the lower side of the other side of the outer surface of the powder grinding box 1 is provided with a discharge port 4, the lower side of the front of the powder grinding box 1 is provided with a slot 16, the powder grinding box 1 is slidably connected with the screen 17 through the slot 16, the front end of the screen 17 is fixedly installed with the sealing plate 9, and the sealing plate 9 is fixedly connected with the front of the powder grinding box 1 through bolts.

[0041] Further, the screen 17 is arranged in the interior of the powder grinding box 1 in an inclined manner through the slot 16, and the position of the screen 17 corresponds to the discharge port 4.

[0042] Further, the guide plate 19 is fixedly installed above the screen 17 in the interior of the powder grinding box 1. The material falling from the grinding roller 13 is guided to the high end of the screen 17, so that the utilization rate and the screening efficiency of the screen 17 are improved.

[0043] The use process of the powder grinding device for lithium battery graphite negative electrode material production is as follows:

[0044] In use, before the lithium battery graphite negative electrode material is ground, the interval of the two grinding rollers 13 can be finely adjusted on line according to the hardness and initial particle size of the raw material, and the specific operation steps are as follows: the first servo motor 7 is started, the driving end drives the worm 18 to rotate, the worm 18 and the worm wheel 21 are meshed and driven, and the two sides of the worm wheel 21 are synchronously rotated; the worm wheel 21 drives the bidirectional screw rod 14 to rotate, the transmission action of the left-hand thread and the right-hand thread on the bidirectional screw rod 14 is utilized, the two adjusting seats 12 are synchronously moved relative to or opposite to each other under the sliding constraint of the adjusting seat 12 and the guide rail 11; the displacement of the adjusting seat 12 is directly transmitted to the grinding roller 13 mounted thereon, so that the interval between the two grinding rollers 13 is accurately adjusted. After the interval setting is completed, the second servo motor 15 is started, and the driving end drives the grinding roller 13 to rotate relatively; at this time, the material to be ground is put into the interior of the powder grinding box 1 through the feeding end 2, and under the flow guiding action of the feeding end 2, the material falls into the crushing area between the two grinding rollers 13 to receive the grinding process. The worm and worm wheel and bidirectional screw rod mechanism driven by the first servo motor 7 realize the on-line adjustment of the grinding roller interval, and can flexibly adapt to different material characteristics and target particle size requirements.

[0045] The material after the grinding process falls from the grinding roller 13 to the guide plate 19 arranged obliquely, and the material is collected to one side under the guidance of the guide plate 19 and falls to the high end of the screen 17; then the material rolls along the inclined surface of the screen 17, and dynamic screening is realized in the rolling process: the qualified material with a particle size smaller than the aperture of the screen 17 falls into the bottom of the grinding box 1 through the screen hole and is discharged through the discharge port 10; the large-particle material that does not pass the screening continues to move along the screen surface and is finally discharged through the discharge port 4, which can be recycled for regrinding. The screening process effectively ensures the consistency of the particle size of the finished product. In addition, the screen 17 is installed in the built-in slot 16 of the box by sliding and inserting from the front of the grinding box 1, and the disassembly and maintenance process is as follows: first, the connecting bolts between the fixed sealing plate 9 and the front of the grinding box 1 are disassembled, and the screen 17 can be pulled out along the direction of the slot 16 through the sealing plate 9. Different aperture screens 17 can be replaced according to the target product specification, and the screen itself is easy to clean and maintain, which significantly improves the process adaptability and operation practicability of the equipment.

[0046] It should be noted that all types of components used in this application file are standard components that can be purchased on the market, and the specific connection method of each part uses conventional means such as bolts, rivets, and welding in existing technology. The mechanical, parts and electrical equipment all use conventional models in existing technology, and the circuit connection uses conventional connection methods in existing technology. The electrical equipment is in communication with the outside safe power supply, and specific descriptions are not made here.

[0047] In the present application, unless otherwise expressly provided and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or in communication with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements, unless otherwise expressly limited. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0048] Obviously, the above-described embodiments are only a part of the embodiments of the present application, rather than all the embodiments, and the preferred embodiments of the present application are given in the drawings, but do not limit the patent scope of the present application. The present application can be realized in many different forms, and conversely, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing specific embodiments, or equivalently replace some of the technical features. Any equivalent structure made by using the content of the present application specification and drawings, directly or indirectly used in other related technical fields, is also within the patent protection scope of the present application.

Claims

1. A pulverizing device for producing a lithium battery graphite negative material, characterized by, The utility model relates to a powder grinding box, which comprises a powder grinding box (1), a feeding end (2) fixedly installed on the top of the powder grinding box (1), a discharging port (10) formed in the bottom of the powder grinding box (1), symmetrically distributed support frames (3) fixedly installed on the bottom of the powder grinding box (1), a through slot (20) formed in the top of the front and back of the powder grinding box (1), a drive box (5) fixedly installed on the front and back of the powder grinding box (1) and corresponding to the position of the through slot (20), and an adjusting assembly arranged in the drive box (5). The adjusting assembly comprises a bidirectional screw rod (14) rotatably installed at the lower part of the inside of the drive box (5), a guide rail (11) fixedly installed on the top of the inside of the drive box (5), symmetrically distributed adjusting seats (12) sleeved on the outer walls of the two bidirectional screw rods (14), the adjusting seats (12) slidably installed on the guide rail (11), a grinding roller (13) rotatably installed between the two adjusting seats (12) on the same side of the powder grinding box (1), the grinding roller (13) penetrating through the through slot (20) and located below the feeding end (2) of the powder grinding box (1), a second servo motor (15) fixedly installed on the front of one adjusting seat (12), the driving end of the second servo motor (15) penetrating through the adjusting seat (12) and fixedly connected with the front end of the grinding roller (13), a protective cover (6) fixedly installed on the top of one side of the outer surface of the powder grinding box (1), and a drive assembly arranged in the inside of the protective cover (6).

2. The grinding device for producing a lithium battery graphite negative material according to claim 1, characterized in that, The drive assembly comprises a worm (18) rotatably installed in the inside of the protective cover (6), one end of each of the two bidirectional screw rods (14) penetrating through the drive box (5) and extending into the inside of the protective cover (6), a worm wheel (21) fixedly installed on one end of each of the two bidirectional screw rods (14), the worm wheel (21) meshing with the worm (18), a first servo motor (7) fixedly installed on the front of the protective cover (6), the driving end of the first servo motor (7) penetrating through the protective cover (6) and extending into the inside of the protective cover (6), and the driving end of the first servo motor (7) fixedly connected with the front end of the worm (18).

3. The grinding device for producing a lithium battery graphite negative material according to claim 1, characterized in that, A discharging port (4) is formed in the lower part of the other side of the outer surface of the powder grinding box (1), a slot (16) is formed in the lower part of the front of the powder grinding box (1), a screen (17) is slidably inserted into the slot (16) of the powder grinding box (1), a sealing plate (9) fixedly installed on the front end of the screen (17), and the sealing plate (9) fixedly connected with the front of the powder grinding box (1) through bolts.

4. The grinding device for producing a lithium battery graphite negative material according to claim 3, characterized in that, The screen (17) is obliquely arranged in the inside of the powder grinding box (1) through the slot (16), and the position of the screen (17) corresponds to the discharging port (4).

5. The grinding device for producing a lithium battery graphite negative material according to claim 3, characterized in that, A guide plate (19) is fixedly installed on the top of the screen (17) in the inside of the powder grinding box (1).

6. The grinding device for producing a lithium battery graphite negative material according to claim 1, characterized in that, A heat dissipation window (8) is formed in the front of one drive box (5), and a filter screen is fixedly installed in the inside of the heat dissipation window (8).

7. The grinding device for producing a lithium battery graphite negative material according to claim 1, characterized in that, The adjusting seat (12) is provided with a threaded hole matched with the bidirectional screw rod (14), and the adjusting seat (12) is threadedly connected with the bidirectional screw rod (14) through the threaded hole.

8. The grinding device for producing a lithium battery graphite negative material according to claim 1, characterized in that, The top of the adjusting seat (12) is provided with a sliding groove matched with the guide rail (11), and the adjusting seat (12) is slidingly connected with the guide rail (11) through the sliding groove.

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