Electrode slurry high-speed cold homogenizing system and new energy lithium battery production process thereof

Abstract

The invention discloses an electrode slurry high-speed cold homogenizing system and a new energy lithium battery production process thereof. The high-speed cold homogenizing system for the electrode slurry comprises a base, a central rotating assembly, a first focus stirring assembly and a second focus disturbing assembly. The central rotating assembly comprises a barrel body and a central driving mechanism; the barrel body is rotationally arranged on the base in an inclined posture; the first focus stirring assembly comprises a stirring main shaft and a stirring driving mechanism; the stirring main shaft is rotationally arranged in the barrel body in an eccentric manner; the second focus disturbance assembly comprises a scraper mechanism; a spiral water channel is formed by the barrel bottom and the barrel body of the barrel body, a rotary joint is arranged at the barrel bottom of the barrel body, and a cooling water inlet / outlet and a slurry outlet are formed in the rotary joint. According to the high-speed cold homogenizing system for the electrode slurry, the stirring device participates in the homogenizing process of the electrode slurry in an auxiliary manner, so that the electrode slurry in the barrel body forms an overturning effect, the heat dissipation performance of the electrode slurry in the homogenizing process is improved, and the production quality of the electrode slurry is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electrode slurry production for lithium batteries, and in particular to an electrode slurry high-speed cold homogenization system and a new energy lithium battery production process thereof. Background Art

[0002] In the production process of lithium batteries, the electrode slurry needs to be stirred. The traditional method is to place the electrode slurry in a barrel and use a stirring device to simply stir the electrode slurry in the barrel. On the one hand, the stirring blade in the stirring device directly acts on the electrode slurry. On the other hand, the electrode slurry will generate a lot of heat during the stirring process and it is difficult to dissipate. The combined effect of the above two factors will lead to a decrease in the quality of the produced electrode slurry.

[0003] Therefore, how to develop and design a high-speed cold homogenization system for electrode slurry, change the traditional process, allow the stirring device to auxiliary participate in the homogenization process of the electrode slurry, make the electrode slurry in the barrel form a flipping effect, improve the heat dissipation performance of the electrode slurry during the homogenization process, and thus improve the production quality of the electrode slurry, this is a technical problem that needs to be solved. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide an electrode slurry high-speed cold homogenization system and a new energy lithium battery production process thereof, so that a stirring device is auxiliaryly involved in the homogenization process of the electrode slurry, so that the electrode slurry in the barrel forms a flipping effect, thereby improving the heat dissipation performance of the electrode slurry during the homogenization process, thereby improving the production quality of the electrode slurry.

[0005] The objective of the present invention is achieved through the following technical solutions:

[0006] An electrode slurry high-speed cold homogenization system comprises: a base, a central rotating assembly, a first focal point stirring assembly, and a second focal point disturbance assembly;

[0007] The central rotating assembly comprises a barrel body and a central driving mechanism drivingly connected to the barrel body; the barrel body is rotatably arranged on the base in an inclined posture;

[0008] The first focal stirring assembly comprises a stirring main shaft and a stirring driving mechanism connected to the stirring main shaft; the stirring main shaft is eccentrically rotatably disposed in the barrel body, and the central axis of the stirring main shaft is parallel to the central axis of the barrel body;

[0009] The second focal disturbance component includes a scraper mechanism; the scraper mechanism is arranged on the inner wall of the barrel in a fixed position;

[0010] The bottom and body of the barrel form a spiral waterway, the bottom of the barrel is provided with a rotary joint, a cooling water inlet and outlet and a slurry discharge port are provided on the rotary joint, the cooling water inlet and outlet are connected with the spiral waterway, and the slurry discharge port is connected with the barrel body.

[0011] In one of the embodiments, a protective cover is provided on the base, and the protective cover wraps the barrel body of the barrel.

[0012] In one embodiment, the central driving mechanism is a motor driving structure.

[0013] In one embodiment, the stirring drive mechanism includes a stirring shaft motor and a right-angle gear box, and the stirring shaft motor is drivingly connected to the stirring main shaft through the right-angle gear box.

[0014] In one of the embodiments, a negative pressure spiral blade is provided in the middle of the stirring main shaft.

[0015] In one of the embodiments, a stirring blade is provided at the end of the stirring main shaft.

[0016] In one of the embodiments, the spiral water channel includes a barrel bottom spiral flow channel located at the barrel bottom of the barrel body and an interlayer spiral flow channel located at the barrel body, and the barrel bottom spiral flow channel and the interlayer spiral flow channel are interconnected.

[0017] In one embodiment, the second focal disturbance assembly includes two sets of scraper mechanisms, and the two sets of scraper mechanisms are arranged circumferentially along the inner wall of the barrel;

[0018] The scraper mechanism comprises a main body support part and a blade part detachably mounted on the main body support part; the blade part forms a plurality of blade teeth distributed in sequence along its extension line direction, a slurry overflow groove is formed between two adjacent blade teeth, and each blade tooth has a scraping inclined surface facing the center of the barrel body and a pressing inclined surface facing the bottom of the barrel body;

[0019] The blade teeth are pressed against the inner wall of the barrel body, and the slurry overflow groove does not contact the inner wall of the barrel body to form a suspended position; along the axial direction of the barrel body, the blade teeth of the two groups of scraper mechanisms are staggered with each other so that the blade teeth of one group of scraper mechanisms fill the suspended position of the slurry overflow groove of the other group of scraper mechanisms.

[0020] In one of the embodiments, the scraper mechanism is also provided with a scraper temperature sensor.

[0021] A new energy lithium battery production process comprises the following steps:

[0022] Electrode slurry stirring, the electrode slurry is homogenized based on the above-mentioned electrode slurry high-speed cold homogenization system;

[0023] Electrode coating, drying, rolling and slitting;

[0024] Coil;

[0025] Battery shell welding and sealing;

[0026] injecting electrolyte;

[0027] Formation, sorting and assembly.

[0028] The electrode slurry high-speed cold homogenization system and the new energy lithium battery production process of the present invention allow the stirring device to auxiliary participate in the homogenization process of the electrode slurry, so that the electrode slurry in the barrel forms a flipping effect, improves the heat dissipation performance of the electrode slurry in the homogenization process, and thus improves the production quality of the electrode slurry. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 This is an external structural diagram of an electrode slurry high-speed cold homogenization system according to an embodiment of the present invention;

[0031] Figure 2 for Figure 1 The internal structure diagram of the electrode slurry high-speed cold homogenization system shown;

[0032] Figure 3 for Figure 2 The structural diagram of the stirring spindle shown;

[0033] Figure 4 for Figure 1 The structural diagram of the scraper mechanism of the second focus disturbance assembly shown (I);

[0034] Figure 5 for Figure 1 The structural diagram of the scraper mechanism of the second focus disturbance assembly shown (II);

[0035] Figure 6 for Figure 2 The structural diagram of the barrel shown in (a);

[0036] Figure 7 for Figure 2 The structural diagram of the barrel shown (II);

[0037] Figure 8 for Figure 2 The structural diagram of the rotary joint shown;

[0038] Fig. 9 It is a schematic diagram of the electrode slurry forming a turning effect in the barrel;

[0039] Fig.10 It is a structural diagram of two sets of scraper mechanisms being mutually offset and arranged in the barrel body. DETAILED DESCRIPTION

[0040] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly understood.

[0041] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0043] like Figure 1 and Figure 2 As shown, the present invention discloses an electrode slurry high-speed cold homogenization system 10, comprising: a base 100, a central rotating component 200, a first focal point stirring component 300, and a second focal point disturbance component 400.

[0044] like Figure 2 As shown, the central rotating assembly 200 includes a barrel 210 and a central driving mechanism 220 drivingly connected to the barrel 210. In this embodiment, the central driving mechanism 220 is a motor driving structure. The barrel 210 is rotatably arranged on the base 100 in an inclined posture; it can be understood that the rotation center axis of the barrel 210 is not perpendicular to the horizontal plane, but forms an inclined angle, which is between 0 and 90 degrees, preferably 60 degrees.

[0045] like Figure 2 As shown, the first focal stirring assembly 300 includes a stirring main shaft 310 and a stirring driving mechanism 320 drivingly connected to the stirring main shaft 310. The stirring main shaft 310 is eccentrically rotatably arranged in the barrel body 210, and the central axis of the stirring main shaft 310 is parallel to the central axis of the barrel body 210. In this embodiment, the stirring driving mechanism 320 includes a stirring shaft motor and a right-angle gear box, and the stirring shaft motor is drivingly connected to the stirring main shaft 310 through the right-angle gear box. Figure 3 As shown, further, a negative pressure spiral blade 311 is provided in the middle of the stirring main shaft 310, and a stirring blade head 312 is provided at the end of the stirring main shaft 310. The stirring blade head 312 directly contacts the electrode slurry to participate in stirring, and the negative pressure spiral blade 311 rotates with the stirring main shaft 310 to press the electrode slurry downward toward the bottom of the barrel.

[0046] like Figure 4 and Figure 5 As shown, the second focal disturbance assembly 400 includes a scraper mechanism 410; the scraper mechanism 410 is fixedly disposed on the inner wall of the barrel 210. Further, the scraper mechanism 410 is also provided with a scraper temperature sensor 401 (such as Figure 4 shown).

[0047] like Figure 6 and Figure 7 As shown, the barrel bottom and barrel body of the barrel body 210 form a spiral water channel 230, and the barrel bottom of the barrel body 210 is provided with a rotating joint 500 (such as Figure 2 The rotary joint 500 is provided with a cooling water inlet and outlet 510 and a slurry outlet 520 (as shown in FIG. Figure 8 As shown), the cooling water inlet and outlet 510 is connected to the spiral water channel 230, and the slurry outlet 520 is connected to the barrel body 210.

[0048] Next, the working principle of the electrode slurry high-speed cold material mixing system 10 of the above structure is described:

[0049] The electrode slurry is fed into the tank through the feed port of the barrel 210;

[0050] The central driving mechanism 220 drives the barrel 210 to rotate, and the electrode slurry in the barrel 210 rotates accordingly, forming a central revolution motion (such as Fig. 9 At the same time, the stirring drive mechanism 320 drives the stirring spindle 310 to rotate, and the stirring spindle 310 stirs the electrode slurry in the barrel 210. The rotation direction of the barrel 210 is opposite to the rotation direction of the stirring spindle 310, forming a rotation motion at the first focal position (as shown in FIG. Fig. 9 2);

[0051] Here, it should be noted that Fig. 9 As shown, the electrode slurry contained in the barrel body 210 which is placed tilted and revolves centrally can be turned inside by the combined action of gravity and the first focal point stirring assembly 300 (as shown in FIG. Fig. 9 As shown in the label 3), a flipping effect is achieved;

[0052] like Fig.10 As shown, the scraper mechanism 410 is at the second focal position, and forms a relative inner circular motion with the revolving barrel body, thereby forming reflection and disturbance, and at the same time cleaning off the electrode slurry adhered to the barrel wall;

[0053] like Fig. 9 As shown, the electrode slurry achieves the purpose of high-speed homogenization of materials under the combined effects of central revolution, first focus stirring, flipping effect, and second focus disturbance;

[0054] A large amount of heat is generated during the high-speed mixing of the electrode slurry. The scraper temperature sensor 401 and the control board provided on the scraper mechanism 410 can be used to control the cooling water to enter the spiral water channel 230 through the rotary joint 500 for cooling to reach a temperature that meets the requirements for material uniformity.

[0055] After the material mixing is completed, the electrode slurry in the barrel 210 is discharged through the slurry outlet 520 .

[0056] It should be noted that the present invention does not simply stir the electrode slurry in a conventional manner, such as Fig. 9 As shown, in the present invention, on the one hand, the electrode slurry contained in the barrel body 210 which is tilted and centrally revolves can be flipped to the inside on one side thereof in contact with the barrel wall by the combined action of gravity and the first focus stirring assembly 300, thereby achieving a flipping effect. The electrode slurry is not only mixed more evenly, but also has a better cooling effect. On the other hand, the electrode slurry can achieve the purpose of high-speed homogenization of the material by the combined action of the central revolution, the first focus stirring, the flipping effect, and the second focus disturbance.

[0057] like Figure 1 and Figure 2 As shown, in the present invention, a protective cover 110 is provided on the base 100, and the protective cover 110 wraps the barrel body of the barrel body 210. It can be understood that a receiving groove for accommodating the barrel body 210 is provided on the base 100, and the receiving groove can be understood as the protective cover 110, so that the barrel body of the barrel body 210 is wrapped, so that the rotating barrel body 210 can be isolated from the outside world, thereby improving the safety of production.

[0058] like Figure 6 and Figure 7As shown, in the present invention, the spiral water channel 230 includes a barrel bottom spiral flow channel 231 located at the barrel bottom of the barrel body 210 and a sandwich spiral flow channel 232 located at the barrel body, and the barrel bottom spiral flow channel 231 and the sandwich spiral flow channel 232 are mutually connected. The rotary joint 500 is provided with a cooling water inlet and outlet 510, and the cooling water enters the barrel bottom spiral flow channel 231 through the water inlet, and then reaches the sandwich spiral flow channel 232 from the barrel bottom spiral flow channel 231, and the sandwich spiral flow channel 232 then returns the cooling water to the water outlet, thereby forming a circulating cooling of the cooling water.

[0059] like Figure 2 As shown, in the present invention, the scraper in the scraper mechanism 410 is inserted from the cover plate of the barrel body 210 into the interior of the tank body, one end of the scraper is fixed on the cover plate, and the other end is in a suspended state, and the blade of the scraper is tightly against the inner wall of the barrel body 210. During the high-speed rotation of the barrel body 210, the slurry on its inner wall will hit the scraper at a very high speed. Over time, the scraper in the suspended state will inevitably shift in position, and then the blade will separate from the inner wall of the barrel body 210, and a good scraping effect cannot be achieved. The scraper has a short service life and is prone to loosening.

[0060] Furthermore, the scraper mechanism 410 forms a relative inner circular motion with the revolving barrel body. Since the traditional scraper has no optimized structural design, it cannot press the scraped electrode slurry to the bottom of the barrel well, and the electrode slurry is easy to scatter everywhere, and a good scraping effect cannot be achieved.

[0061] In order to solve the above technical problems, the second focus disturbance component 400 is optimized. Specifically, the second focus disturbance component 400 includes two sets of scraper mechanisms 410, which are arranged along the inner wall of the barrel 210 (such as Fig. 9 and Fig.10 shown).

[0062] like Figure 4 and Figure 5 As shown, the scraper mechanism 410 includes a main body support portion 420 and a blade portion 430 detachably mounted on the main body support portion 420; the blade portion 430 forms a plurality of teeth 431 spaced in sequence along its extension line direction, and a slurry overflow groove 432 is formed between two adjacent teeth 431, and each tooth 431 has a scraping inclined surface 433 toward the center of the barrel body and a pressing inclined surface 434 toward the bottom of the barrel body (such as Figure 4 and Figure 5 shown).

[0063] The blade teeth 431 are held against the inner wall of the barrel body 210, and the slurry overflow groove 432 does not contact the inner wall of the barrel body 310, but forms a suspended position; along the axis direction of the barrel body 210, the blade teeth 431 of the two groups of scraper mechanisms 410 are mutually staggered, so that the blade teeth 431 of one group of scraper mechanisms 410 fill the suspended position of the slurry overflow groove 432 of the other group of scraper mechanisms 410 (such as Fig.10 shown).

[0064] Next, the working principle of the second focus perturbation component 400 of the above structure is described:

[0065] During the high-speed rotation of the barrel body 210, the slurry on its inner wall will first pass through the first set of scraper mechanisms 410. Since the blade portion 430 forms a plurality of teeth 431 spaced in sequence along its extension line, a slurry overflow groove 432 is formed between two adjacent teeth 431. In this way, only part of the slurry will contact the teeth 431 and be scraped off, and the other part of the slurry will pass through the slurry overflow groove 432 and will not be scraped off temporarily. On the one hand, since only part of the slurry hits the teeth 431, the impact force is greatly reduced, and the scraper is not easy to loosen, which has the advantages of Good scraping effect; on the other hand, part of the slurry passing through the slurry overflow groove 432 will impact on the material pressing inclined surface 434, and this impact force F will be decomposed into two components F1 and F2, one of which is formed in the extension line direction of the blade portion 430, thereby weakening the force of the lateral impact F2 on the blade portion 430, and the scraper is not easy to loosen; on the other hand, the material pressing inclined surface 434 will press part of the slurry passing through the slurry overflow groove 432 toward the bottom of the barrel, which has a guiding effect, and the scraping inclined surface 433 will also guide the slurry to the center of the barrel;

[0066] like Fig.10 As shown, after the slurry passes through the first group of scraper mechanisms 410, due to the existence of the slurry overflow groove 432, part of the slurry cannot be scraped off. The part of the slurry that cannot be scraped off reaches the second group of scraper mechanisms 410 as the barrel body 210 rotates. Since the teeth 431 of the two groups of scraper mechanisms 410 are staggered with each other, the teeth 431 of the second group of scraper mechanisms 410 fill the vacant positions of the slurry overflow groove 432 of the first group of scraper mechanisms 410, thereby continuing to scrape off the slurry that has not been scraped off.

[0067] The present invention also discloses a new energy lithium battery production process, comprising the following steps:

[0068] Electrode slurry stirring, the electrode slurry is homogenized based on the above-mentioned electrode slurry high-speed cold homogenization system; specifically, the electrode slurry is put into the tank body through the feed port of the barrel body 210, the central driving mechanism 220 drives the barrel body 210 to rotate, and the stirring driving mechanism 320 drives the stirring spindle 310 to rotate. The rotation direction of the barrel body 210 is opposite to the rotation direction of the stirring spindle 310, forming a self-rotation motion at the first focal position, and the scraper mechanism 410 is at the second focal position, forming a relative inner circle motion with the revolving barrel body, forming reflection and disturbance, and at the same time cleaning the electrode slurry adhered to the barrel wall. Under the joint action of the central revolution, the first focal point stirring, the flipping effect, and the second focal point disturbance, the electrode slurry achieves the purpose of high-speed homogenization of the material. The scraper temperature sensor 401 and the control panel arranged on the scraper mechanism 410 control the cooling water to enter the spiral water channel 230 through the rotary joint 500 for cooling. After the homogenization is completed, the electrode slurry in the barrel body 210 is discharged through the slurry discharge port 520;

[0069] Electrode coating, drying, rolling and slitting;

[0070] Coil;

[0071] Battery shell welding and sealing;

[0072] injecting electrolyte;

[0073] Formation, sorting and assembly.

[0074] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A high-speed cold homogenization system for electrode slurry, characterized in that: include: A base, a central rotating assembly, a first focal point stirring assembly, and a second focal point disturbance assembly; The central rotating assembly comprises a barrel body and a central driving mechanism drivingly connected to the barrel body; the barrel body is rotatably arranged on the base in an inclined posture; The first focal stirring assembly comprises a stirring main shaft and a stirring driving mechanism connected to the stirring main shaft; the stirring main shaft is eccentrically rotatably disposed in the barrel body, and the central axis of the stirring main shaft is parallel to the central axis of the barrel body; The second focal disturbance component includes a scraper mechanism; the scraper mechanism is arranged on the inner wall of the barrel in a fixed position; The bottom and body of the barrel form a spiral waterway, the bottom of the barrel is provided with a rotary joint, a cooling water inlet and outlet and a slurry discharge port are provided on the rotary joint, the cooling water inlet and outlet are connected with the spiral waterway, and the slurry discharge port is connected with the barrel body.

2. The electrode slurry high-speed cold homogenization system according to claim 1, characterized in that: A protective cover is provided on the base, and the protective cover wraps the barrel body of the barrel.

3. The electrode slurry high-speed cold homogenization system according to claim 1, characterized in that: The central driving mechanism is a motor driving structure.

4. The electrode slurry high-speed cold homogenization system according to claim 1, characterized in that: The stirring drive mechanism comprises a stirring shaft motor and a right-angle gear box, and the stirring shaft motor is drivingly connected to the stirring main shaft via the right-angle gear box.

5. The electrode slurry high-speed cold homogenization system according to claim 4, characterized in that: A negative pressure spiral piece is arranged in the middle of the stirring main shaft.

6. The electrode slurry high-speed cold homogenization system according to claim 5, characterized in that: A stirring blade is provided at the end of the stirring main shaft.

7. The electrode slurry high-speed cold homogenization system according to claim 1, characterized in that: The spiral water channel comprises a barrel bottom spiral flow channel located at the barrel bottom of the barrel body and an interlayer spiral flow channel located at the barrel body, and the barrel bottom spiral flow channel and the interlayer spiral flow channel are interconnected.

8. The electrode slurry high-speed cold homogenization system according to claim 1, characterized in that: The second focal disturbance assembly includes two groups of scraper mechanisms, and the two groups of scraper mechanisms are arranged circumferentially along the inner wall of the barrel; The scraper mechanism comprises a main body support part and a blade part detachably mounted on the main body support part; the blade part forms a plurality of blade teeth distributed in sequence along its extension line direction, a slurry overflow groove is formed between two adjacent blade teeth, and each blade tooth has a scraping inclined surface facing the center of the barrel body and a pressing inclined surface facing the bottom of the barrel body; The blade teeth are pressed against the inner wall of the barrel body, and the slurry overflow groove does not contact the inner wall of the barrel body to form a suspended position; along the axial direction of the barrel body, the blade teeth of the two groups of scraper mechanisms are staggered with each other so that the blade teeth of one group of scraper mechanisms fill the suspended position of the slurry overflow groove of the other group of scraper mechanisms.

9. The electrode slurry high-speed cold homogenization system according to claim 8, characterized in that: The scraper mechanism is also provided with a scraper temperature sensor.

10. A new energy lithium battery production process, characterized in that: The steps include: Electrode slurry stirring, homogenizing the electrode slurry based on the electrode slurry high-speed cold homogenizing system according to any one of claims 1 to 9; Electrode coating, drying, rolling and slitting; Coil; Battery shell welding and sealing; injecting electrolyte; Formation, sorting and assembly.

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