Raw material wet premixing device for lithium iron phosphate production

Abstract

The utility model relates to a raw material wet premixing device for lithium iron phosphate production, and belongs to the technical field of lithium battery production equipment. The reaction kettle mainly comprises a supporting base, a reaction kettle body, a shell, a cooling pipe, a stirring mechanism, a feeding pipe, a sealing cover and a discharging pipe. The stirring mechanism is installed in the reaction kettle, various raw materials input by the feeding pipe can be fully mixed, heat generated in the reaction process can be effectively dissipated through the cooling pipe, the temperature of slurry is prevented from being too high, and therefore the stability, the fluidity and the electrochemical performance of the slurry are guaranteed, and the problems in the subsequent battery manufacturing process are reduced; according to the utility model, active substances, conductive agents, binders and other materials can be more uniformly mixed, the performance of the materials is fully exerted, the quality and performance of the battery are improved, and the design of the feeding pipe and the discharging pipe facilitates the addition of raw materials and the discharge of slurry, so that the production process is more continuous and efficient.

Description

TECHNICAL FIELD

[0001] The utility model belongs to lithium battery production equipment technical field, concretely relates to a raw material wet method premixing device for lithium iron phosphate production. BACKGROUND

[0002] Lithium iron phosphate electrode material is mainly used for various lithium ion batteries, and has the characteristics of large discharge capacity, low price, non-toxicity and no environmental pollution, and the premixing and slurry preparation is one of the most critical processes in the production of lithium batteries, and the core task of the wet premixing and slurry preparation is to uniformly mix the lithium battery precursor raw material powder and solvent and other materials, so that the material performance can be better exerted.

[0003] In the preparation of lithium iron phosphate slurry, chemical reactions occur between raw materials, these reactions are usually exothermic reactions, if the reaction speed is too fast or the reaction heat cannot be dissipated in time, the temperature of the slurry will rise, and the high temperature may cause the components in the slurry to decompose, agglomerate or other adverse changes, thereby affecting the stability, flowability and electrochemical performance of the slurry, which may cause problems in the subsequent battery manufacturing process, such as uneven coating, electrode quality decline, etc., the utility model provides a raw material wet method premixing device for lithium iron phosphate production to solve the above problems. SUMMARY

[0004] In order to overcome the problem that the high temperature generated by the chemical reaction between raw materials in the preparation of lithium iron phosphate slurry may cause the components in the slurry to decompose, agglomerate or other adverse changes, thereby affecting the stability, flowability and electrochemical performance of the slurry, the utility model provides a raw material wet method premixing device for lithium iron phosphate production, which can effectively and uniformly dissipate the heat generated during the reaction process, so that the raw material powder is more uniformly mixed, the performance of the material is fully exerted, and the quality and performance of the battery are improved.

[0005] To achieve the above object, the utility model is realized through the following technical scheme: a raw material wet method premixing device for lithium iron phosphate production mainly includes support base, reaction kettle, shell, cooling pipe, stirring mechanism, feed pipe, cover, discharge pipe, the reaction kettle is installed at the top of the support base, the shell is installed outside the reaction kettle, the cavity interlayer is formed between the reaction kettle and the shell, the cooling pipe is coiled outside the reaction kettle and located in the cavity interlayer, the inside of the reaction kettle is set as a cavity structure, the stirring mechanism is installed in the inside of the reaction kettle through the top of the reaction kettle, the feed pipe is installed at the top of the reaction kettle, the feed pipe is communicated with the reaction kettle, the cover is installed on the feed pipe, the discharge pipe is installed at the bottom of the reaction kettle, and the discharge pipe is communicated with the reaction kettle.

[0006] The stirring mechanism comprises a motor, a rotating shaft, a curved-leaf turbine stirrer, a propeller stirrer and a curved surface stirrer, the motor is installed at the top end of the reaction kettle, the rotating shaft extends through the top end of the reaction kettle to the inside of the reaction kettle, the motor is in transmission connection with the rotating shaft, and the curved-leaf turbine stirrer, the propeller stirrer and the curved surface stirrer are installed on the rotating shaft.

[0007] The curved surface stirrer is installed at the bottom end of the rotating shaft and is spaced from the bottom end of the reaction kettle, the curved-leaf turbine stirrer and the propeller stirrer are both provided with two, the two curved-leaf turbine stirrers are installed above the curved surface stirrer, one propeller stirrer is installed between the two curved-leaf turbine stirrers in a spaced mode, and the other propeller stirrer is installed at the top end of the rotating shaft.

[0008] The discharge pipe is provided with an electromagnetic valve.

[0009] The top end of the reaction kettle is provided with a transparent observation window.

[0010] The utility model discloses the beneficial effect:

[0011] The stirring mechanism is installed in the inside of the reaction kettle, is favorable to the full mixing of various raw materials input by the feeding pipe, the cooling pipe can effectively dissipate the heat generated in the reaction process, avoids that the slurry temperature is too high, thereby guarantees the stability, fluidity and electrochemical performance of the slurry, reduces the problem in the subsequent battery manufacturing process, adopts the wet method premixing, can make active substance, conductive agent, binder and other materials more uniformly mix, fully play the performance of material, improve the quality and performance of battery, and the design of the feeding pipe and the discharge pipe facilitates the addition of raw materials and the discharge of slurry, makes the production process more continuous and efficient. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is isometric schematic view of the utility model.

[0013] Figure 2 It is three-dimensional schematic view of the utility model.

[0014] Figure 3 It is local section schematic view of the utility model.

[0015] Figure 4 It is still another local section schematic view of the utility model. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical scheme and beneficial effect of the utility model more clear, the preferred embodiment of the utility model will be explained in detail below in combination with the drawings, so as to facilitate the understanding of the technical personnel.

[0017] The utility model discloses a raw material wet method premixing device for lithium iron phosphate production, raw material wet method premixing device for lithium iron phosphate production mainly includes support base 1, reaction kettle 2, shell 3, cooling pipe 4, stirring mechanism 5, feed pipe 6, cover 7, discharge pipe 8, reaction kettle 2 is installed at support base 1 top, shell 3 is installed at reaction kettle 2 outside, and the cavity interlayer is formed between reaction kettle 2 and shell 3, and cooling pipe 4 is coiled at reaction kettle 2 outside, is located in the cavity interlayer, and the inside of reaction kettle 2 is arranged as cavity structure, and stirring mechanism 5 is installed in reaction kettle 2 inside and passes through reaction kettle 2 top end, feed pipe 6 is installed at reaction kettle 2 top end, and feed pipe 6 is connected with reaction kettle 2, and cover 7 is installed on feed pipe 6, and discharge pipe 8 is installed at reaction kettle 2 bottom end, and discharge pipe 8 is connected with reaction kettle 2.

[0018] The raw material required for producing lithium iron phosphate is transported to the internal cavity structure of reaction kettle 2, after adding the raw material, cover 7 is covered, to prevent the raw material from splashing or being polluted by the outside during mixing, start motor 51, and motor 51 drives rotating shaft 52 to rotate, and bent blade turbine type stirrer 53, propeller type stirrer 54 and curved surface stirrer 55 are installed on rotating shaft 52, which will stir the raw material to make it mix fully, in the stirring process, in order to control the reaction temperature and prevent the slurry temperature from being too high, cooling pipe 4 will pass in cooling medium (such as water), cooling pipe 4 is coiled at reaction kettle 2 outside, is located in the cavity interlayer, and through heat exchange with reaction kettle 2, the heat generated during reaction is taken away, so as to adjust the temperature inside reaction kettle 2, and at the same time, bent blade turbine type stirrer 53, propeller type stirrer 54 and curved surface stirrer 55 will stir and turn the raw material, to ensure that the reaction is carried out under suitable temperature conditions, which helps to ensure the quality of lithium iron phosphate production raw material premixing, when the mixing reaches the requirement, open the electromagnetic valve on discharge pipe 8, and the mixed slurry is discharged.

[0019] As Figure 3 , Figure 4As shown, the stirring mechanism 5 comprises a motor 51, a rotating shaft 52, a curved-leaf turbine stirrer 53, a propeller stirrer 54, and a curved surface stirrer 55. The motor 51 is installed at the top end of the reaction kettle 2, the rotating shaft 52 extends through the top end of the reaction kettle 2 to the inside of the reaction kettle 2, the motor 51 is in transmission connection with the rotating shaft 52, and the curved-leaf turbine stirrer 53, the propeller stirrer 54, and the curved surface stirrer 55 are installed on the rotating shaft 52. The curved surface stirrer 55 is installed at the bottom end of the rotating shaft 52 and is spaced from the bottom end of the reaction kettle 2. The curved-leaf turbine stirrer 53 and the propeller stirrer 54 are both provided with two, the two curved-leaf turbine stirrers 53 are installed above the curved surface stirrer 55, one propeller stirrer 54 is installed between the two curved-leaf turbine stirrers 53, and the other is installed at the top end of the rotating shaft 52. The rotation of the motor 51 drives the rotating shaft 52 to rotate, and the curved-leaf turbine stirrer 53, the propeller stirrer 54, and the curved surface stirrer 55 installed on the rotating shaft 52 rotate with the rotating shaft 52. The curved-leaf turbine stirrer 53 can strongly stir the raw materials in the reaction kettle 2, preliminarily mix different raw materials, and form a strong material flow in the reaction kettle 2. The propeller stirrer 54 further enhances the mixing effect of the raw materials and can produce an axial flow to turn the raw materials at the bottom of the reaction kettle 2 upward, so that the raw materials can be fully mixed in the vertical direction. The curved surface stirrer 55 stirs and disturbs the raw materials through its special curved surface structure, ensures that the molecules of each raw material can fully contact, and improves the premixing effect.

[0020] The discharge pipe 8 is provided with an electromagnetic valve.

[0021] As shown in Figure 1 , Figure 2 The top end of the reaction kettle 2 is provided with a transparent observation window 21. During the premixing process, the operator can observe the mixing condition of the raw materials in the reaction kettle 2 through the transparent observation window 21 at the top end of the reaction kettle 2 to make adjustments at any time.

[0022] Working process:

[0023] First, the raw materials required for the production of lithium iron phosphate are transported into the internal cavity structure of the reaction kettle 2, after adding the raw materials, cover the cover 7, prevent the raw materials from splashing out or being contaminated by the outside during the mixing process, start the motor 51, the motor 51 drives the rotating shaft 52 to rotate, the rotating shaft 52 is provided with a curved blade turbine type stirrer 53, a propeller type stirrer 54 and a curved surface stirrer 55, which will stir the raw materials to make them fully mixed, the curved blade turbine type stirrer 53 can generate strong radial flow and tangential flow, so that the material forms a strong circulating flow in the reaction kettle 2, improves the mixing effect, the propeller type stirrer 54 mainly generates axial flow, which helps to push the material to the bottom and edge of the reaction kettle 2, further enhances the uniformity of mixing, the curved surface stirrer 55 can increase the stirring area and intensity, so that the material close to the wall of the reaction kettle 2 can also be fully stirred, in the stirring process, in order to control the reaction temperature and prevent the slurry temperature from being too high, the cooling pipe 4 will pass through the cooling medium (such as water), the cooling pipe 4 is coiled outside the reaction kettle 2 and located in the cavity interlayer, which exchanges heat with the reaction kettle 2 and carries away the heat generated by the reaction, thereby adjusting the temperature inside the reaction kettle 2, at the same time, the curved blade turbine type stirrer 53, the propeller type stirrer 54 and the curved surface stirrer 55 will stir and turn the raw materials, ensuring that the reaction is carried out at a suitable temperature, which helps to ensure the quality of the lithium iron phosphate production raw material premix, the operator can observe the mixing situation and slurry state inside the reaction kettle 2 through the transparent observation window 21, so as to adjust the stirring speed, cooling medium flow and other parameters in time, when the mixing reaches the requirement, open the electromagnetic valve on the discharge pipe 8 to discharge the mixed slurry, during the whole mixing process, the supporting base 1 plays the role of stabilizing device to ensure the stable operation of the equipment, through the above working process, the wet method premixing device can realize the uniform mixing of the lithium iron phosphate production raw materials and effectively control the reaction temperature, ensure the quality and performance of the slurry, and provide a good foundation for the subsequent battery manufacturing process.

[0024] Finally, it should be pointed out that the above preferred embodiments are only used to illustrate the technical solutions of the present application and are not limiting, although the present application has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present application.

Claims

1. A wet premixing device for raw materials in lithium iron phosphate production, characterized in that: The utility model provides a reaction kettle, including support base (1), reaction kettle (2), shell (3), cooling pipe (4), stirring mechanism (5), feed pipe (6), cover (7), discharge pipe (8), reaction kettle (2) is installed at support base (1) top, shell (3) is installed at reaction kettle (2) outside, and the cavity interlayer is formed between reaction kettle (2) and shell (3), cooling pipe (4) is coiled at reaction kettle (2) outside, is located in the cavity interlayer, and reaction kettle (2) is arranged as cavity structure, stirring mechanism (5) is installed in reaction kettle (2) inside through reaction kettle (2) top, feed pipe (6) is installed at reaction kettle (2) top, and feed pipe (6) is connected with reaction kettle (2), cover (7) is installed on feed pipe (6), and discharge pipe (8) is installed at reaction kettle (2) bottom, and discharge pipe (8) is connected with reaction kettle (2).

2. The raw material wet pre-mixing device for lithium iron phosphate production according to claim 1, characterized in that: The utility model discloses a reaction kettle, including support base (1), reaction kettle (2), shell (3), cooling pipe (4), stirring mechanism (5), feed pipe (6), cover (7), discharge pipe (8), reaction kettle (2) is installed at support base (1) top, shell (3) is installed at reaction kettle (2) outside, and the cavity interlayer is formed between reaction kettle (2) and shell (3), cooling pipe (4) is coiled at reaction kettle (2) outside, is located in the cavity interlayer, and reaction kettle (2) is arranged as cavity structure, stirring mechanism (5) is installed in reaction kettle (2) inside through reaction kettle (2) top, feed pipe (6) is installed at reaction kettle (2) top, and feed pipe (6) is connected with reaction kettle (2), cover (7) is installed on feed pipe (6), and discharge pipe (8) is installed at reaction kettle (2) bottom, and discharge pipe (8) is connected with reaction kettle (2).

3. The raw material wet pre-mixing device for lithium iron phosphate production according to claim 2, characterized in that: The utility model discloses a reaction kettle, including support base (1), reaction kettle (2), shell (3), cooling pipe (4), stirring mechanism (5), feed pipe (6), cover (7), discharge pipe (8), reaction kettle (2) is installed at support base (1) top, shell (3) is installed at reaction kettle (2) outside, and the cavity interlayer is formed between reaction kettle (2) and shell (3), cooling pipe (4) is coiled at reaction kettle (2) outside, is located in the cavity interlayer, and reaction kettle (2) is arranged as cavity structure, stirring mechanism (5) is installed in reaction kettle (2) inside through reaction kettle (2) top, feed pipe (6) is installed at reaction kettle (2) top, and feed pipe (6) is connected with reaction kettle (2), cover (7) is installed on feed pipe (6), and discharge pipe (8) is installed at reaction kettle (2) bottom, and discharge pipe (8) is connected with reaction kettle (2).

4. The raw material wet pre-mixing device for lithium iron phosphate production according to claim 1 or 2, characterized in that: The utility model discloses a reaction kettle, including support base (1), reaction kettle (2), shell (3), cooling pipe (4), stirring mechanism (5), feed pipe (6), cover (7), discharge pipe (8), reaction kettle (2) is installed at support base (1) top, shell (3) is installed at reaction kettle (2) outside, and the cavity interlayer is formed between reaction kettle (2) and shell (3), cooling pipe (4) is coiled at reaction kettle (2) outside, is located in the cavity interlayer, and reaction kettle (2) is arranged as cavity structure, stirring mechanism (5) is installed in reaction kettle (2) inside through reaction kettle (2) top, feed pipe (6) is installed at reaction kettle (2) top, and feed pipe (6) is connected with reaction kettle (2), cover (7) is installed on feed pipe (6), and discharge pipe (8) is installed at reaction kettle (2) bottom, and discharge pipe (8) is connected with reaction kettle (2).

5. The raw material wet pre-mixing device for lithium iron phosphate production according to claim 1 or 2, characterized in that: The utility model discloses a reaction kettle, including support base (1), reaction kettle (2), shell (3), cooling pipe (4), stirring mechanism (5), feed pipe (6), cover (7), discharge pipe (8), reaction kettle (2) is installed at support base (1) top, shell (3) is installed at reaction kettle (2) outside, and the cavity interlayer is formed between reaction kettle (2) and shell (3), cooling pipe (4) is coiled at reaction kettle (2) outside, is located in the cavity interlayer, and reaction kettle (2) is arranged as cavity structure, stirring mechanism (5) is installed in reaction kettle (2) inside through reaction kettle (2) top, feed pipe (6) is installed at reaction kettle (2) top, and feed pipe (6) is connected with reaction kettle (2), cover (7) is installed on feed pipe (6), and discharge pipe (8) is installed at reaction kettle (2) bottom, and discharge pipe (8) is connected with reaction kettle (2).

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