Flexible automatic grinding device for negative electrode material of lithium battery

Abstract

The utility model belongs to the technical field of caked powder crushing, and particularly relates to a flexible automatic grinding device for a lithium battery cathode material, which comprises a bearing plate arranged in a powder bin and dividing the powder bin into an upper part and a lower part; wherein a discharge hole is formed in the bearing plate to connect the upper part and the lower part of the powder bin; a motor is arranged at the top end of the powder bin; the first-stage grinding mechanism is arranged on the upper end face of the bearing plate, is connected with the output end of the motor and is suitable for primarily crushing the caked powder in the powder bin and discharging the caked powder from the discharging opening; the second-stage grinding mechanism is arranged on the lower end face of the bearing plate, connected with the first-stage grinding mechanism and suitable for conducting secondary grinding on the powder penetrating through the discharging opening; by arranging the first-stage grinding mechanism, agglomerated powder stored in the powder bin can be preliminarily crushed, and the preliminarily crushed powder is guided into the second-stage grinding mechanism to be finely ground, so that the situation that the agglomerated powder is discharged, and follow-up production is affected is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of grinding agglomerated powder materials, and in particular relates to a flexible automatic grinding device for negative electrode materials of lithium batteries. Background Art

[0002] In the production and use of lithium batteries, the transportation and storage of negative electrode material powders will be encountered. For negative electrode powders with poor fluidity and easy compaction, most of them are currently stored in conical silos. During the unloading process, the powders often form arches or bridges, or clump in the silo, making it impossible to unload smoothly.

[0003] The existing authorized patent with application number CN201822238392.1 arranges the stirring member and the crushing member at equal intervals, and the stirring member is equipped with a first tooth, while the crushing member is equipped with a second tooth. Through the cross movement between the stirring member and the crushing member, the material is squeezed and crushed between the first tooth and the second tooth, thereby crushing the block material.

[0004] However, in this patent, during the rotation of the stirring member, part of the agglomerated powder at the bottom thereof cannot come into contact with the crushing member and cannot be crushed while following the rotation of the stirring member, resulting in part of the agglomerated powder remaining in the powder passing through the discharge port.

[0005] Therefore, it is necessary to design a flexible automatic grinding device for lithium battery negative electrode materials that can crush the agglomerated powder multiple times. Utility Model Content

[0006] The purpose of the utility model is to provide a flexible automatic grinding device for lithium battery negative electrode materials to solve the above technical problems.

[0007] In order to solve the above technical problems, the utility model provides a flexible automatic grinding device for lithium battery negative electrode materials, comprising: a carrying plate, which is arranged inside the powder bin and divides the powder bin into two parts, an upper part and an lower part;

[0008] The carrying plate is provided with a discharge port to connect the upper and lower parts of the powder bin;

[0009] A motor is disposed at the top of the powder bin; and

[0010] The primary grinding mechanism is arranged on the upper surface of the bearing plate and connected to the output end of the motor, and is suitable for preliminarily crushing the agglomerated powder inside the powder bin and discharging it from the discharge port;

[0011] The secondary grinding mechanism is arranged on the lower end surface of the bearing plate and connected to the primary grinding mechanism, and is suitable for secondary grinding of the powder passing through the discharge port.

[0012] Further, the primary grinding mechanism comprises:

[0013] A crushing assembly connected to the output end of the motor; wherein

[0014] The crushing assembly is suitable for preliminarily crushing the agglomerated powder in the powder bin in the process of following the rotation of the motor output end.

[0015] Further, the crushing assembly comprises:

[0016] Arrange a plurality of fixing members on the carrying plate; and

[0017] Several rotating parts connected to the output end of the motor;

[0018] The plurality of rotating parts are suitable for pushing the agglomerated powder in the powder bin to contact with the fixed part and be squeezed and crushed in the process of following the rotation of the output end of the motor.

[0019] Furthermore, each of the fixing members is spaced apart from each of the rotating members; and

[0020] The output end of the motor is connected with a connecting rod;

[0021] The connecting rod is connected to the top end of each rotating member;

[0022] The output end of the motor drives each rotating member to rotate in the powder bin through a connecting rod, pushing the agglomerated powder to move to contact with each fixed member, so as to break the agglomerated powder.

[0023] Further, the secondary grinding mechanism comprises:

[0024] An upper grinding member and a lower grinding member are arranged below the supporting plate; wherein

[0025] The upper end surface of the upper grinding member is connected to the lower end surface of the bearing plate; and

[0026] The lower end surface of the upper grinding piece fits with the upper end surface of the lower grinding piece to perform secondary grinding on the powder after the initial crushing.

[0027] Furthermore, the secondary grinding mechanism further comprises:

[0028] A rotating shaft, a top end of which is connected to an output end of the motor; and

[0029] The rotating shaft passes through the bearing plate, and its bottom end is connected to the upper end surface of the upper grinding piece, so as to drive the upper grinding piece to rotate when the motor is started, and perform secondary grinding on the powder falling between the upper grinding piece and the lower grinding piece.

[0030] Furthermore, a feed port is provided on the upper grinding piece, so that the agglomerated powder after the initial crushing can pass through the feed port and fall between the upper grinding piece and the lower grinding piece for secondary grinding.

[0031] The beneficial effect of the utility model is that the utility model can preliminarily crush the clumped powder stored in the powder bin by providing a primary grinding mechanism, and introduce the preliminarily crushed powder into the secondary grinding mechanism for fine grinding to avoid discharging the clumped powder and affecting subsequent production.

[0032] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by practicing the utility model. The purpose and other advantages of the utility model are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0033] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0036] Figure 2 It is a front cross-sectional structural schematic diagram of the utility model;

[0037] Figure 3 It is a cross-sectional structural diagram of the secondary grinding mechanism of the utility model;

[0038] Figure 4 The utility model Figure 3 The enlarged structural diagram of part A in the middle;

[0039] Figure 5 This is a schematic diagram of the first state of the primary grinding mechanism of the utility model;

[0040] Figure 6 It is a schematic diagram of the second state of the primary grinding mechanism of the utility model.

[0041] In the figure:

[0042] 1. Powder silo; 11. Loading plate; 12. Discharge port;

[0043] 2. Motor; 21. Motor output terminal;

[0044] 3. Discharge pipe;

[0045] 4. primary grinding mechanism; 41. connecting rod; 42. rotating part; 43. fixed part;

[0046] 5. Secondary grinding mechanism; 51. Upper grinding piece; 511. Feed inlet; 52. Grinding gap; 53. Lower grinding piece;

[0047] 6. Bracket. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0049] In the actual storage and transportation process of lithium battery negative electrode powder, a stirring and crushing device is used to crush the powder in the powder bin once, resulting in the powder still clumping in the powder of the discharge device.

[0050] like Figures 1 to 6 As shown, in order to solve the above technical problems, a flexible automatic grinding device for lithium battery negative electrode materials is provided, comprising: a supporting plate 11, arranged inside a powder bin 1, dividing the powder bin 1 into an upper and lower part; wherein a discharge port 12 is opened on the supporting plate 11 to connect the upper and lower parts of the powder bin 1; a motor 2 is arranged at the top of the powder bin 1; and a primary grinding mechanism 4, arranged on the upper end surface of the supporting plate 11, connected to the motor output end 21, suitable for preliminary crushing of the agglomerated powder inside the powder bin 1 and discharging it from the discharge port 12; a secondary grinding mechanism 5, arranged on the lower end surface of the supporting plate 11, connected to the primary grinding mechanism 4, suitable for secondary grinding of 12 powder passing through the discharge port.

[0051] In this embodiment, the powder stored in the powder silo 1 is stirred, and the primary grinding mechanism 4 is used to perform preliminary crushing of the agglomerated powder in the powder silo 1 to break up the larger agglomerated powder. The powder after the preliminary crushing is then introduced into the secondary grinding mechanism 5 for secondary grinding. The smaller agglomerated powder after the preliminary crushing is further ground to break up all the powder to avoid agglomeration during subsequent transportation.

[0052] like Figure 2 As shown, in this embodiment, the primary grinding mechanism 4 includes: a crushing assembly connected to the motor output end 21; wherein the crushing assembly is suitable for performing preliminary crushing of agglomerated powder in the powder bin in the process of following the rotation of the motor output end 21;

[0053] In this embodiment, the motor 2 is started, and the crushing assembly is used to rotate along with the motor output end 21 to preliminarily crush the agglomerated powder in the powder bin 1 .

[0054] like Figure 2 As shown, in this embodiment, the crushing assembly includes: a plurality of fixing members 43 arranged on the carrying plate 11; and a plurality of rotating members 42 connected to the motor output end 21; wherein the plurality of rotating members 424 are adapted to push the agglomerated powder in the powder bin 1 to contact the fixing members 43 and be squeezed and crushed in the process of following the rotation of the motor output end 21;

[0055] In this embodiment, a plurality of rotating parts 42 are utilized. When the rotating parts 42 rotate along with the output end of the motor 2, the rotating parts 42 contact the agglomerated powder in the powder bin 1, and push the agglomerated powder to rotate until the agglomerated powder contacts the plurality of fixed parts 43. The agglomerated powder is initially crushed by the extrusion between the rotating parts 42 and the fixed parts 43.

[0056] like Figure 2 As shown, in this embodiment, each of the fixing members 43 and each of the rotating members 42 are arranged at intervals; and the motor output end 21 is connected to a connecting rod 41; wherein

[0057] The connecting rod 41 is connected to the top of each rotating member 42; the motor output end 21 drives each rotating member 42 to rotate in the powder bin 1 through the connecting rod 41, pushing the agglomerated powder to move to contact with each fixed member 43, so as to break the agglomerated powder;

[0058] In this embodiment, the output end of the motor 2 drives the plurality of rotating parts 42 to rotate synchronously through the connecting rod 41, and by arranging the plurality of rotating parts 42 and the plurality of fixed parts 43 at intervals, the plurality of rotating parts 42 push the powder to rotate during the rotation process, and when cross-contacting with the plurality of fixed parts 43, the agglomerated powder is squeezed and crushed.

[0059] like Figures 3 to 6 As shown, in this embodiment, the secondary grinding mechanism 5 includes: an upper grinding member 51 and a lower grinding member 53 arranged below the carrier plate 11; wherein the upper end surface of the upper grinding member 51 is connected to the lower end surface of the carrier plate 11; and the lower end surface of the upper grinding member 51 fits with the upper end surface of the lower grinding member 53 to perform secondary grinding on the powder after the initial crushing;

[0060] In this embodiment, the powder material initially crushed by the primary grinding mechanism 4 is introduced between the upper and lower grinding pieces, so that after the upper and lower grinding pieces grind the initially crushed powder material into powder for the second time, the powder material is discharged from the grinding gap 52 and falls to the discharge pipe 3.

[0061] like Figure 4As shown, in this embodiment, the secondary grinding mechanism 4 further includes: a rotating shaft 54, the top end of which is connected to the motor output end 21; and the rotating shaft 54 ​​passes through the carrier plate 11, and the bottom end of which is connected to the upper end surface of the upper grinding member 51, so as to drive the upper grinding member 51 to rotate when the motor 2 is started, and perform secondary grinding on the powder falling between the upper grinding member 51 and the lower grinding member 53;

[0062] In this embodiment, by starting the motor 2, its output end drives the rotating shaft 54 ​​to rotate, the rotating shaft 54 ​​passes through the supporting plate 11 and is connected to the bearing of the supporting plate 11, thereby driving the upper grinding member 51 to rotate, while the lower grinding member 53 is connected to the inner wall of the bottom of the powder bin 1 and remains stationary. Through the rotation of the upper grinding member 51, the powder that has been initially crushed between the upper and lower grinding members is subjected to secondary grinding.

[0063] like Figure 5 and Figure 6 As shown, in this embodiment, a feed port is provided on the upper grinding piece, so that the agglomerated powder after preliminary crushing can pass through the feed port and fall between the upper grinding piece and the lower grinding piece for secondary grinding.

[0064] In this embodiment, the powder after preliminary crushing passes through the discharge port 12 and falls on the upper end surface of the upper grinding member 6 as the plurality of rotating members 42 rotate, and falls into the discharge gap 51 from the feed port 61 opened on the upper end surface of the upper grinding member 6. As the upper grinding member 6 rotates, the powder in the grinding gap 52 is ground for the second time to crush all small agglomerated powders into powder for discharge.

[0065] In summary, by providing a primary grinding mechanism, the agglomerated powder stored in the powder silo can be initially crushed, and the powder after the initial crushing can be introduced into the secondary grinding mechanism for fine grinding to avoid discharging the agglomerated powder and affecting subsequent production.

[0066] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0067] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0068] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A flexible automatic grinding device for lithium battery negative electrode materials, characterized in that: include: The load-bearing plate is arranged inside the powder bin and divides the powder bin into two parts, an upper part and an lower part; in The carrying plate is provided with a discharge port to connect the upper and lower parts of the powder bin; A motor is provided at the top of the powder bin; and The primary grinding mechanism is arranged on the upper surface of the bearing plate and connected to the output end of the motor, and is suitable for preliminarily crushing the agglomerated powder inside the powder bin and discharging it from the discharge port; The secondary grinding mechanism is arranged on the lower end surface of the bearing plate and connected to the primary grinding mechanism, and is suitable for secondary grinding of the powder passing through the discharge port.

2. The flexible automatic grinding device for lithium battery negative electrode materials according to claim 1, characterized in that: The primary grinding mechanism comprises: A crushing assembly connected to the output end of the motor; wherein The crushing assembly is suitable for preliminarily crushing the agglomerated powder in the powder bin in the process of following the rotation of the motor output end.

3. The flexible automatic grinding device for lithium battery negative electrode materials according to claim 2, characterized in that: The crushing assembly comprises: Arrange a plurality of fixing members on the carrying plate; and Several rotating parts connected to the output end of the motor; The plurality of rotating parts are suitable for pushing the agglomerated powder in the powder bin to contact with the fixed part and be squeezed and crushed in the process of following the rotation of the output end of the motor.

4. The flexible automatic grinding device for lithium battery negative electrode materials according to claim 3, characterized in that: Each of the fixing members is spaced apart from each of the rotating members; and The output end of the motor is connected with a connecting rod; in The connecting rod is connected to the top end of each rotating member; The output end of the motor drives each rotating member to rotate in the powder bin through a connecting rod, pushing the agglomerated powder to move to contact with each fixed member, so as to break the agglomerated powder.

5. The flexible automatic grinding device for lithium battery negative electrode materials according to claim 4, characterized in that: The secondary grinding mechanism comprises: An upper grinding member and a lower grinding member are arranged below the supporting plate; wherein The upper end surface of the upper grinding member is connected to the lower end surface of the bearing plate; and The lower end surface of the upper grinding piece fits with the upper end surface of the lower grinding piece to perform secondary grinding on the powder after the initial crushing.

6. The flexible automatic grinding device for lithium battery negative electrode materials according to claim 5, characterized in that: The secondary grinding mechanism also includes: A rotating shaft, a top end of which is connected to an output end of the motor; and The rotating shaft passes through the bearing plate, and its bottom end is connected to the upper end surface of the upper grinding piece, so as to drive the upper grinding piece to rotate when the motor is started, and perform secondary grinding on the powder falling between the upper grinding piece and the lower grinding piece.

7. The flexible automatic grinding device for lithium battery negative electrode materials according to claim 6, characterized in that: The upper grinding piece is provided with a feed inlet, so that the agglomerated powder after the initial crushing can pass through the feed inlet and fall between the upper grinding piece and the lower grinding piece for secondary grinding.

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