Lithium battery negative electrode material liquid phase coating device

Abstract

The utility model belongs to the technical field of lithium batteries, and particularly relates to a lithium battery negative electrode material liquid-phase coating device which comprises a coating barrel, a liquid-phase coating device and a liquid-phase coating device, the scattering ring is coaxially arranged in the coating barrel, and a plurality of horizontally arranged material passing channels are formed in the scattering ring; the stirrer is coaxially arranged in the scattering ring; the driving mechanism is suitable for driving the scattering ring and the stirrer to rotate in opposite directions; according to the lithium battery negative electrode material liquid phase coating device, the scattering ring and the stirrer rotate in opposite directions, so that materials between the scattering ring and the stirrer are subjected to two opposite acting forces, and the materials are dispersed in the scattering ring and the stirrer, so that the materials are uniformly dispersed in the scattering ring and the stirrer; the mixed materials moving along with the flow can be prevented from being crushed, and the mixed materials can be impacted to the scattering pieces on the scattering ring by utilizing the force of moving along with the flow.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium batteries, and in particular relates to a liquid phase coating device for negative electrode materials of lithium batteries. Background Art

[0002] Liquid phase coating of the negative electrode material of a lithium battery is a common method for modifying battery materials. The negative electrode material is immersed in a coating liquid to form a thin film or coating on the surface of the negative electrode material.

[0003] According to relevant technologies, the coating liquid has a certain viscosity. When the negative electrode material of the lithium battery is put into the coating liquid, it is easy to clump in the coating liquid, resulting in uneven coating. Therefore, it needs to be crushed.

[0004] However, the existing processing method generally uses an agitator, and the paddles on the agitator are rotated to hit and break the agglomerated materials. The stirring direction of the agitator is relatively single, and it can only rotate forward and reverse, so that the agglomerated materials are easy to move with the flow, resulting in incomplete crushing. Utility Model Content

[0005] In order to solve the technical problems mentioned in the background technology, the utility model provides a liquid-phase coating device for negative electrode materials of lithium batteries, which comprises: a coating barrel; a scattering ring, coaxially arranged in the coating barrel, and provided with a plurality of horizontally arranged material transfer channels; an agitator, coaxially arranged in the scattering ring; and a driving mechanism, suitable for driving the scattering ring and the agitator to rotate in opposite directions; wherein the material transfer channel is obliquely arranged in the direction of rotation of the scattering ring, and a scattering sheet is inserted in the material transfer channel.

[0006] Furthermore, the breaking pieces are arc-shaped and arranged to be close to the inner wall of the material passing channel.

[0007] Furthermore, one end of the scattering piece extends out of the material passing channel to protrude from the inner wall of the scattering ring.

[0008] Furthermore, the direction in which the scattering pieces are located in the material transfer channel is opposite to the rotation direction of the scattering ring, so as to receive and guide the materials into the material transfer channel.

[0009] Furthermore, a reflux pipe is provided at the bottom of the coating barrel; wherein the inlet of the reflux pipe is located between the scattering ring and the coating barrel, and the outlet of the reflux pipe is suitable for returning materials into the scattering ring.

[0010] Furthermore, the reflux pipe includes: an inlet pipe, an adapter and an outlet pipe; one end of the inlet pipe is connected to the bottom of the coating barrel, and the other end is connected to the outlet pipe through the adapter.

[0011] Furthermore, the discharge pipe and the feed pipe are arranged orthogonally.

[0012] Furthermore, a pump body is arranged on the discharge pipe.

[0013] The beneficial effect of the utility model is that the scattering ring and the agitator of the lithium battery negative electrode material liquid phase coating device rotate in opposite directions, so that the material between the two is subjected to two reverse forces, which can not only prevent the mixed material moving with the flow from being broken, but also use the force moving with the flow to make the mixed material collide with the scattering pieces on the scattering ring.

[0014] 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.

[0015] 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

[0016] 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.

[0017] Figure 1 It is a structural schematic diagram of the liquid phase coating device of the negative electrode material of the lithium battery;

[0018] Figure 2 It is a schematic diagram of the structure in which the breaking ring is located in the coating barrel;

[0019] Figure 3 It is a schematic diagram of the structure of the broken ring;

[0020] Figure 4 It is a schematic diagram of the top view of the structure of the beating ring and the agitator.

[0021] In the figure:

[0022] Coating barrel 1;

[0023] A breaking ring 2, a material passing channel 21, and a breaking sheet 22;

[0024] Mixer 3;

[0025] Reflux pipe 5, inlet pipe 51, adapter 52, outlet pipe 53, pump body 54. DETAILED DESCRIPTION

[0026] 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.

[0027] like Figures 1 to 4 As shown, at least one embodiment provides a liquid-phase coating device for negative electrode materials of lithium batteries, which includes: a coating barrel 1; a scattering ring 2, coaxially arranged in the coating barrel 1, and provided with a plurality of horizontally arranged feed channels 21; an agitator 3, coaxially arranged in the scattering ring 2; and a driving mechanism, suitable for driving the scattering ring 2 and the agitator 3 to rotate in opposite directions; wherein the feed channel 21 is obliquely arranged in the direction of rotation of the scattering ring 2, and a scattering sheet 22 is inserted in the feed channel 21.

[0028] In some embodiments, the scattering ring 2 and the agitator 3 rotate in opposite directions so that the materials therebetween are subjected to two opposing forces, which can not only prevent the mixed materials moving with the flow from being crushed, but also utilize the force moving with the flow to make the mixed materials collide with the scattering pieces 22 on the scattering ring 2.

[0029] In some embodiments, the coating barrel 1 is used to hold the coating liquid, and then the lithium battery negative electrode material to be coated is put into the coating barrel 1 and stirred and mixed by the stirrer 3.

[0030] In some embodiments, the agitator 3 is disposed at the center of the coating barrel 1, and is used to stir the coating liquid and the negative electrode material to form a mixed material, and to break up the agglomerated negative electrode material during the stirring process. At the same time, during the stirring process, the mixed material will be pushed outward by the agitator 3, thereby flowing toward the breaking ring 2; wherein the agitator 3 only rotates in one direction during stirring.

[0031] like Figure 4 As shown, in some embodiments, the scattering ring 2 is coaxially arranged on the periphery of the agitator 3, and its rotation direction is opposite to that of the agitator 3. The scattering pieces 22 thereon "bite" the oncoming mixed material layer by layer, and the centrifugal force generated by the rotation causes the bitten material to pass through the scattering ring 2 through the material passage 21. At the same time, if the scattering pieces 22 come into contact with the agglomerated material during the "biting" process, they will crush it.

[0032] In some embodiments, the driving mechanism includes two independent drivers, which are used to drive the beating ring 2 and the agitator 3 to rotate respectively.

[0033] like Figure 1As shown, in some embodiments, the reflux pipe 5 is used to transport the mixed material outside the scattering ring 2 into the scattering ring 2, so that the mixed material is fully mixed; specifically, the feed pipe 51 of the reflux pipe 5 is connected with the bottom of the coating barrel 1, and the feed port is located outside the scattering ring 2, the feed pipe 51 is connected with the discharge pipe 53 through the adapter 52, and the discharge port of the discharge pipe 53 is located above the scattering ring 2, so that the mixed material can flow back into the scattering ring 2, wherein a pump body 54 is used as a power source, and the pump body 54 is arranged on the discharge pipe 53.

[0034] In some embodiments, the discharge pipe 53 and the inlet pipe 51 are arranged orthogonally.

[0035] like Figure 3 As shown, in some embodiments, the scattering piece 22 is arc-shaped and adapted to the inner wall of the feeding channel 21 so as to be close to the inner wall of the feeding channel 21. At the same time, one end of the scattering piece 22 extends out of the feeding channel 21 to protrude from the inner wall of the scattering ring 2, and the protruding end bites the mixed material like a "tooth". Among them, the position of the scattering piece 22 in the feeding channel 21 is opposite to the rotation direction of the scattering ring 2, which is convenient for receiving and guiding the material into the feeding channel 21.

[0036] In summary, the scattering ring 2 and the agitator 3 of the liquid phase coating device for negative electrode materials of lithium batteries rotate in opposite directions, so that the materials between them are subjected to two reverse forces, which can not only prevent the mixed materials moving with the flow from being broken, but also use the force moving with the flow to make the mixed materials collide with the scattering pieces 22 on the scattering ring 2.

[0037] The various devices selected in this application (components whose specific structures are not described) are all universal standard parts or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0038] 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.

[0039] 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.

[0040] 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 liquid phase coating device for negative electrode materials of lithium batteries, characterized in that: include: Coated barrel (1); A scattering ring (2) is coaxially arranged in the coating barrel (1) and is provided with a plurality of horizontally arranged material transfer channels (21); A stirrer (3) is coaxially arranged in the beating ring (2); as well as The driving mechanism is suitable for driving the beating ring (2) and the agitator (3) to rotate in opposite directions; The material transfer channel (21) is arranged obliquely toward the direction of rotation of the scattering ring (2), and a scattering sheet (22) is inserted into the material transfer channel (21).

2. The liquid phase coating device for negative electrode materials of lithium batteries according to claim 1, characterized in that: The scattering piece (22) is arc-shaped and is arranged to be closely attached to the inner wall of the material passing channel (21).

3. The liquid phase coating device for negative electrode materials of lithium batteries according to claim 2, characterized in that: One end of the scattering piece (22) extends out of the material passing channel (21) to protrude from the inner wall of the scattering ring (2).

4. The liquid phase coating device for negative electrode materials of lithium batteries according to claim 3, characterized in that: The direction in which the scattering piece (22) is located in the material transfer channel (21) is opposite to the rotation direction of the scattering ring (2), so as to receive and guide the material into the material transfer channel (21).

5. The liquid phase coating device for negative electrode materials of lithium batteries according to claim 4, characterized in that: A reflux pipe (5) is provided at the bottom of the coating barrel (1); wherein The inlet of the reflux pipe (5) is located between the scattering ring (2) and the coating barrel (1), and the outlet of the reflux pipe (5) is suitable for returning materials into the scattering ring (2).

6. The liquid phase coating device for negative electrode materials of lithium batteries according to claim 5, characterized in that: The reflux pipeline (5) comprises: an inlet pipe (51), an adapter (52) and an outlet pipe (53); One end of the feed pipe (51) is connected to the bottom of the coating barrel (1), and the other end is connected to the discharge pipe (53) via a conversion joint (52).

7. The liquid phase coating device for negative electrode materials of lithium batteries according to claim 6, characterized in that: The discharge pipe (53) and the inlet pipe (51) are arranged orthogonally.

8. The liquid phase coating device for negative electrode materials of lithium batteries according to claim 7, characterized in that: A pump body (54) is provided on the discharge pipe (53).

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