Glue making device suitable for lithium battery

Abstract

The glue making device comprises a stirring tank, a stirring motor is connected to the top end of the stirring tank, a driving shaft of the stirring motor is connected with one end of a middle shaft, and the other end of the middle shaft extends into the stirring tank. The middle shaft extending into the stirring tank is connected with a stirring blade synchronously rotating with the middle shaft, a driving shaft of the stirring motor is connected with a plurality of stirring paddles synchronously rotating with the driving shaft, the stirring paddles are of bent structures and are arranged on the periphery of the stirring blade in a dispersing manner, and a gap is formed between each stirring paddle and the stirring blade; a dispersing disc synchronously rotating with the stirring paddle is connected to the bottom of the stirring paddle, the dispersing disc is located under the stirring blade, and a gap is formed between the dispersing disc and the stirring blade. According to the utility model, the working efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of mixers, in particular to a glue making device suitable for lithium batteries. Background Art

[0002] With the rapid development of new energy technologies, lithium batteries, as important energy storage devices, have been widely used in electric vehicles, electronic equipment and other fields. Glue making machines are used to dissolve the binder in lithium batteries so that the binder can be evenly dispersed in the solvent. Binders play an important role in lithium battery manufacturing; however, existing glue making machines have problems such as long glue making time, easy material jamming, incomplete dissolution of glue powder, and easy damage to the glue chain, resulting in low production efficiency and poor battery consistency during the lithium battery manufacturing process.

[0003] In the existing battery manufacturing process, sol is usually made by a double planetary mixer (patent: double planetary mixer (CN201310685541.8)) or a revolving shaft dispersion method. The glue powder is a long-chain macromolecular organic matter. Using a similar double planetary mixing method, the macromolecular chain of the glue powder is often broken, and the long-chain macromolecule is converted into a short chain, which changes the physical and chemical properties of the material; this type of rapid sol method is prone to high overall temperature, and the special elements replaced on the molecular chain react with the solvent to change the material properties; the dissolved glue liquid often shows a significant change in viscosity. At the same time, the double planetary mixing method is used to make glue. Because the dispersion disk is designed with a sharp angle tilt, the sharp angle generates a large shear force at high speed rotation; this shear force is very effective for the uniform dispersion of inorganic materials, and when stirring the long-chain macromolecular lithium battery glue powder, it is easy to destroy part of the long-chain macromolecule at high temperature; the shortening of the molecular chain will reduce the adhesion of the glue powder.

[0004] When the glue liquid is dissolved by the revolving shaft method, the glue powder will swell and take on a tadpole shape. The glue powder cannot be completely dissolved in the solvent within a limited time, and the dissolved glue liquid cannot present a special state. However, very fine white spots will be produced in the process of making lithium battery pole pieces. When the dispersing shaft method is used, the stirring speed is slow, and the flow of the glue liquid does not slow down. The glue powder will swell and take on a tadpole shape due to the slow flow of the glue liquid, which increases the dissolution time. The time to completely dissolve the glue powder becomes longer, and some of the glue powder may not be completely dissolved.

[0005] In the above two conditions, the bonding performance of lithium battery pole pieces is reduced and the cycle life is shortened. At the same time, the insoluble rubber powder will not only fail to form an effective and uniform coating around the lithium battery powder, but will also exist in the form of particles, causing the coating knife edge to be blocked. The unblocked rubber particles will form white spots on the pole piece, occupying the interface between the positive and negative electrode powders and reducing battery performance.

[0006] In view of the above-mentioned defects, the designer has actively carried out research and innovation in order to create a new structure of glue-making device suitable for lithium batteries, making it more valuable for industrial use. Utility Model Content

[0007] In order to solve the above technical problems, the purpose of the utility model is to provide a glue making device suitable for lithium batteries.

[0008] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0009] A glue making device suitable for lithium batteries comprises a stirring tank, wherein a stirring motor is connected to the top of the stirring tank, a driving shaft of the stirring motor is connected to one end of a central shaft, the other end of the central shaft extends into the stirring tank, a stirring blade which rotates synchronously with the central shaft is connected to the central shaft which extends into the stirring tank, a plurality of stirring paddles which rotate synchronously with the stirring motor are connected to the driving shaft of the stirring motor, the stirring paddles are in a curved structure, the plurality of stirring paddles are dispersed on the outer periphery of the stirring paddles, and a spacing is provided between the stirring paddles and the stirring blades, a dispersion disk which rotates synchronously with the stirring paddle is connected to the bottom of the stirring paddle, the dispersion disk is located directly below the stirring blade, and a spacing is provided between the dispersion disk and the stirring blade.

[0010] Preferably, in the glue-making device suitable for lithium batteries, the dispersion disk is a rotary blade dispersion disk.

[0011] Preferably, in the glue-making device suitable for lithium batteries, the central axis is a torsional dispersion axis.

[0012] Preferably, in the glue-making device suitable for lithium batteries, the stirring paddles are provided with an even number, and are equidistantly spaced and arranged on the outer periphery of the stirring blades.

[0013] Preferably, in the glue-making device suitable for lithium batteries, the stirring paddles are provided with 4.

[0014] By means of the above solution, the utility model has at least the following advantages:

[0015] The utility model increases the stirring speed, and through the operation of the stirring motor, it drives the stirring paddle, stirring blades and dispersion disk to rotate at the same time, thereby greatly increasing the stirring area of ​​the stirring device, and can also solve the problems of low rubber powder dissolution efficiency and uneven stirring in the prior art, thereby effectively improving work efficiency.

[0016] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the utility model in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0021] Example

[0022] like Figure 1 As shown, a glue making device suitable for lithium batteries includes a stirring tank 3, a stirring motor 1 is connected to the top of the stirring tank 3, a driving shaft of the stirring motor 1 is connected to one end of a central shaft 2, the other end of the central shaft 2 extends into the stirring tank 3, a stirring blade 4 that rotates synchronously with the central shaft 2 that extends into the stirring tank 3 is connected, a plurality of stirring paddles 5 that rotate synchronously with the stirring motor 1 are connected to the driving shaft, the stirring paddle 5 is in a curved structure, a plurality of the stirring paddles 5 are dispersed on the outer periphery of the stirring blade 4, and a spacing is provided between the stirring paddle 5 and the stirring blade 4, a dispersion disk 6 that rotates synchronously with the stirring paddle is connected to the bottom of the stirring paddle 5, the dispersion disk 6 is located directly below the stirring blade 4, and a spacing is provided between the dispersion disk 6 and the stirring blade 4.

[0023] The dispersing disk 6 in the utility model is a rotary blade type dispersing disk, which can prevent the damage of sharp corners to the long polymer chains and improve the dispersing speed.

[0024] The central axis 2 described in the utility model is a torsion-type dispersion axis, which cooperates with 4 stirring paddles 5 to drive the external glue liquid. The use of the torsion-type dispersion axis has no dead angle for the entire liquid flow during the dispersion process, and the glue powder can accelerate the dissolution process by following the flow of the glue liquid, reducing the probability of the polymer glue liquid forming a tadpole shape during the dissolution process, thereby greatly improving the dissolution quality and dissolution speed. The stirring motor, stirring paddle, stirring blade and dispersion disk in the stirring device are used in combination to increase the stirring speed of the glue making machine.

[0025] The working principle of the utility model is as follows:

[0026] When in use, the device is powered on first, and the stirring motor drives the stirring blades and 5 stirring paddles to rotate through the central shaft, and the stirring paddle drives the dispersion disk to rotate. By setting the stirring motor to operate and simultaneously drive the stirring paddle, stirring blades and 6 dispersion disks to rotate, the stirring range of the stirring paddle is expanded, and the material flow in the stirring tank is driven, thereby improving the stirring efficiency of the rubber making machine. In addition, the stirring area of ​​the stirring device is greatly enhanced, and the problems of low dissolution efficiency and uneven stirring of rubber powder in the prior art can also be solved.

[0027] Table 1

[0028]

[0029] The colloid obtained by the colloid making device of the utility model has a viscosity as shown in Table 1. The final product (negative electrode sheet) after rolling and cutting the colloid has a smooth and flat surface without white spots and good bonding.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0031] In the description of this application, it should be noted that the terms "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply 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 a limitation on this application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0032] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or vertical, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0033] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as within the protection scope of the present invention.

Claims

1. A glue making device suitable for lithium batteries, characterized in that: The invention comprises a stirring tank (3), wherein a stirring motor (1) is connected to the top of the stirring tank (3), a driving shaft of the stirring motor (1) is connected to one end of a central shaft (2), the other end of the central shaft (2) extends into the stirring tank (3), a stirring blade (4) which rotates synchronously with the central shaft (2) which extends into the stirring tank (3) is connected to the central shaft (2), a plurality of stirring paddles (5) which rotate synchronously with the central shaft (2) are connected to the driving shaft of the stirring motor (1), the stirring paddles (5) are in a curved structure, the plurality of stirring paddles (5) are dispersed on the outer periphery of the stirring paddle (4), and a spacing is provided between the stirring paddles (5) and the stirring paddles (4), a dispersing disk (6) which rotates synchronously with the stirring paddle is connected to the bottom of the stirring paddle (5), the dispersing disk (6) is located directly below the stirring paddle (4), and a spacing is provided between the dispersing disk (6) and the stirring paddle (4).

2. The glue making device suitable for lithium batteries according to claim 1, characterized in that: The dispersion disk (6) is a rotary blade dispersion disk.

3. The glue making device suitable for lithium batteries according to claim 1, characterized in that: The central axis (2) is a torsion dispersion axis.

4. The glue making device suitable for lithium batteries according to claim 1, characterized in that: The stirring paddles (5) are provided in an even number and are arranged at equal intervals on the outer periphery of the stirring blade (4).

5. A glue making device suitable for lithium batteries according to claim 1 or 4, characterized in that: The stirring paddles (5) are provided with four.

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