Double-screw coupling device for improving density consistency of lithium ion coating surface

Abstract

The utility model discloses a double-screw coupling device for improving the density consistency of a lithium ion coating surface. The double-screw coupling device comprises a feeding assembly, the valve assembly is arranged at one end part of the feeding assembly; the bearing body is arranged at the other end part of the feeding assembly; the driving assembly is arranged at the extending end of the bearing body; the bearing body is driven by the driving assembly to drive the feeding assembly, an anti-phase sinusoidal waveform structure is formed to evenly convey slurry with low oscillation amplitude, and the slurry is converged and output through the valve assembly. Due to the fact that the slurry conveying device is composed of the feeding assembly, the valve assembly, the bearing body and the driving assembly, the low-oscillation uniform conveying of slurry and the confluence output effect of the valve assembly are achieved, accurate positioning can be achieved, and efficient material conveying can be achieved.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery device technology, and in particular to a twin-screw coupling device for improving the uniformity of lithium-ion coating surface density. Background Technology

[0002] Capacity is one of the most important performance indicators for measuring battery performance, and among the many factors affecting lithium-ion battery capacity, coating density is particularly critical. Therefore, ensuring the consistency of electrode coating density is especially important during battery manufacturing. Deviations in coating density consistency can lead to a series of problems, including substandard battery capacity, decreased cycle performance, and reduced safety performance (for example, lithium dendrite growth may puncture the separator, causing a short circuit).

[0003] Currently, single-screw pumps are commonly used in coating processes. However, due to various factors such as motor vibration, mechanical resonance, and screw rotor rotation, single-screw pump systems can vibrate. This increases the oscillation amplitude of the slurry (fluid) inside the pump, making the feed flow rate unstable and consequently affecting the consistency of the electrode surface density. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology. To achieve the above purpose, a twin-screw coupling device for improving the uniformity of lithium-ion coating surface density is adopted to solve the problems mentioned in the background technology.

[0005] A twin-screw coupling device for improving the uniformity of lithium-ion coating surface density includes:

[0006] Feeding assembly;

[0007] A valve assembly located at one end of the feed assembly;

[0008] The bearing body is located at the other end of the feeding assembly; and

[0009] A drive assembly located at the extended end of the bearing body;

[0010] The drive assembly drives the bearing body to move the feed assembly, forming an anti-phase sinusoidal waveform structure to uniformly convey the slurry with low oscillation amplitude, and the output is converged by the valve assembly. This effectively improves the stability and uniformity of slurry conveying and reduces slurry loss and waste during the conveying process.

[0011] As a further aspect of this utility model: the feeding assembly includes a first plate and a second plate disposed at the extended end of the first plate. The arrangement of the first and second plates makes the structure of the feeding assembly more flexible and adaptable, enabling it to meet the needs of different working conditions and improving the adaptability and flexibility of the equipment.

[0012] As a further aspect of this invention: the first plate includes a connecting shaft, a universal joint disposed on the connecting shaft, and a suction pipe disposed on the universal joint. The combined design of the connecting shaft, universal joint, and suction pipe enables the feeding assembly to absorb slurry more flexibly, thereby improving the slurry absorption and conveying efficiency.

[0013] As a further embodiment of this invention: the second plate includes a rotor disposed on the connecting shaft, a stator circumferentially disposed on the rotor, and an extrusion tube disposed on the stator and the extended end of the rotor. This allows the second plate to form an effective sealed cavity, ensuring the sealing and stability of the slurry during the conveying process and preventing slurry leakage and waste.

[0014] As a further aspect of this invention, the stator and rotor form a sealed cavity. This sealed cavity design further improves the stability and sealing of the slurry delivery, ensuring the safe operation of the equipment.

[0015] As a further aspect of this invention, the valve assembly adopts a three-way valve structure. The three-way valve structure makes the slurry mixing and output more flexible and convenient, improving the operability and practicality of the equipment.

[0016] As a further aspect of this invention, the bearing housing includes a main shaft and a coupling. This allows the bearing housing to operate more stably, improving the stability and reliability of the equipment.

[0017] As a further improvement of this invention, the drive assembly adopts a motor drive structure. This makes the equipment operate more smoothly and efficiently, improving its operating efficiency and performance.

[0018] As a further aspect of this invention, the twin-screw coupling device also includes fasteners for fixing the feeding assembly and a protective kit for rust prevention of the feeding assembly. This not only ensures the stability and safety of the feeding assembly but also improves the durability and service life of the equipment, reducing maintenance costs.

[0019] Compared with the prior art, the present invention has the following technical advantages:

[0020] The above technical solution employs a twin-screw coupling device comprised of a feeding assembly, a valve assembly, a bearing housing, and a drive assembly. The drive assembly drives the bearing housing, causing the feeding assembly to form an anti-phase sinusoidal waveform structure, achieving low-oscillation amplitude and uniform slurry delivery. The slurry is then collected and output via the valve assembly. This improves the stability and uniformity of slurry delivery, reduces slurry loss and waste during transport, and enhances equipment operating efficiency and performance. It solves the problems caused by large slurry (fluid) oscillation amplitude due to system vibration; resulting in unstable and uneven slurry flow, poor uniformity of electrode surface density, and ultimately, substandard battery capacity, poor cycle performance, and safety performance. Attached Figure Description

[0021] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings:

[0022] Figure 1 This is a schematic diagram of the twin-screw coupling device according to an embodiment of this application;

[0023] Figure 2 This is a side view of a twin-screw coupling device according to an embodiment of this application;

[0024] Figure 3 This is a top view of a twin-screw coupling device according to an embodiment of this application;

[0025] Figure 4 This is a schematic diagram of a double helix waveform according to an embodiment of this application.

[0026] In the diagram: 1. Feed assembly; 11. First plate; 111. Connecting shaft; 112. Universal joint; 113. Suction pipe; 12. Second plate; 121. Stator; 122. Rotor; 123. Extrusion pipe; 124. Sealed cavity; 2. Bearing body; 21. Main shaft; 22. Coupling; 3. Valve assembly; 4. Double helix waveform; 41. Original sine wave; 411. Peak; 42. Reverse phase sine wave; 421. Trough; 5. Drive assembly; 6. Fasteners; 7. Protective kit. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Please refer to Figure 1In this embodiment of the invention, a twin-screw coupling device for improving the uniformity of lithium-ion coating surface density includes:

[0029] Feeding assembly 1;

[0030] Valve assembly 3 is located at one end of the feed assembly 1;

[0031] The bearing body 2 is located at the other end of the feeding assembly 1; and

[0032] Drive assembly 5 is located at the extended end of bearing body 2;

[0033] The drive assembly 5 drives the bearing body 2 to drive the feed assembly 1, forming a sinusoidal waveform structure with opposite phase to uniformly transport the slurry with low oscillation amplitude, and the valve assembly 3 is used to combine and output the slurry.

[0034] like Figure 2 As shown, the figure is a side view of a twin-screw coupling device;

[0035] In this embodiment, the feeding assembly 1 includes a first plate 11 and a second plate 12 disposed at the extended end of the first plate 11. The first plate 11 includes a connecting shaft 111, a universal joint 112 disposed on the connecting shaft 111, and a suction pipe 113 disposed on the universal joint 112.

[0036] The second plate 12 includes a rotor 122 disposed on the connecting shaft 111, a stator 121 circumferentially disposed on the rotor 122, and an extrusion tube 123 disposed on the extended ends of the stator 121 and the rotor 122.

[0037] like Figure 3 As shown, the diagram is a top view of a twin-screw coupling device;

[0038] In this embodiment, the stator 121 and the rotor 122 form a sealed cavity 124, and the valve assembly 3 adopts a three-way valve structure.

[0039] In this embodiment, the bearing body 2 includes a main shaft 21 and a coupling 22.

[0040] In this embodiment, the drive component 5 adopts a motor drive structure, specifically a dual servo motor drive structure, which can adjust the angular displacement between the two motors to make the peak of the original sine wave correspond to the trough of the anti-phase sine wave, thereby reducing the oscillation amplitude of the slurry (fluid).

[0041] In this embodiment, the twin-screw coupling device also includes fasteners 6 for fixing the feed assembly 1, and protective kits 7 for preventing rust on the feed assembly 1, which are specifically made of stainless steel.

[0042] like Figure 4 As shown in the figure, the diagram is a schematic diagram of a double helix waveform;

[0043] A twin-screw coupling device is used to transport the slurry. Due to the special geometry of the rotor 122 and stator 121, several separate sealed cavities 124 are formed in the single screw pump. The operation of the rotor 122 continuously transports the slurry in each sealed cavity 124 from the suction pipe 113 to the discharge pipe 123. The slurries from the two single screw pumps are combined through a three-way valve, as shown in the double helix waveform 4. The slurry (fluid) of the single screw pump presents a sine wave 41. By adding a sine wave with an anti-phase 42, the trough 421 of the anti-phase sine wave corresponds to the peak 411 of the original sine wave 41, thereby reducing the oscillation amplitude of the slurry and improving the uniformity of the coating surface density.

[0044] Specifically, the slurry (fluid) of a single screw pump exhibits a sinusoidal waveform, while the twin screw pump device reduces the oscillation amplitude of the slurry (fluid) by adjusting the angular displacement of the two motors to add a sinusoidal wave with an anti-phase (phase difference of 180°), thereby stabilizing and uniformizing the feed flow rate and improving the consistency of the electrode coating surface density.

[0045] Beneficial effects:

[0046] The device employs a dual-servo motor drive, enabling precise positioning and efficient material feeding. Furthermore, by adjusting the angular displacement between the two motors, it can provide a 180° phase-differential sine wave. The equipment is equipped with a twin-screw coupling device, consisting of two single-screw pumps, and incorporates an additional phase-differential waveform design. This ensures that the peaks of the original sine wave correspond to the troughs of the phase-differential sine wave, effectively reducing the oscillation amplitude of the slurry (fluid). In addition, the device provides a stable and uniform feed flow rate, ensuring a high degree of consistency in the electrode surface density.

[0047] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0048] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A twin-screw coupling device for improving the uniformity of lithium-ion coating surface density, characterized in that, include: Feeding assembly; A valve assembly located at one end of the feed assembly; The bearing body is located at the other end of the feeding assembly; as well as A drive assembly located at the extended end of the bearing body; The drive assembly drives the bearing body to move the feed assembly, forming a sinusoidal waveform structure with opposite phase to uniformly transport the slurry with low oscillation amplitude, and the valve assembly is used to combine and output the slurry.

2. The twin-screw coupling device for improving the uniformity of lithium-ion coating surface density according to claim 1, characterized in that, The feeding assembly includes a first plate and a second plate disposed at the extended end of the first plate.

3. The twin-screw coupling device for improving the uniformity of lithium-ion coating surface density according to claim 2, characterized in that, The first plate includes a connecting shaft, a universal joint disposed on the connecting shaft, and a suction pipe disposed on the universal joint.

4. The twin-screw coupling device for improving the uniformity of lithium-ion coating surface density according to claim 3, characterized in that, The second plate includes a rotor disposed on the connecting shaft, a stator circumferentially disposed on the rotor, and an extrusion tube disposed on the stator and the extended end of the rotor.

5. The twin-screw coupling device for improving the uniformity of lithium-ion coating surface density according to claim 4, characterized in that, The stator and rotor form a sealed cavity.

6. The twin-screw coupling device for improving the uniformity of lithium-ion coating surface density according to claim 1, characterized in that, The valve assembly adopts a three-way valve structure.

7. The twin-screw coupling device for improving the uniformity of lithium-ion coating surface density according to claim 1, characterized in that, The bearing housing includes a main shaft and a coupling.

8. The twin-screw coupling device for improving the uniformity of lithium-ion coating surface density according to claim 1, characterized in that, The drive component adopts a motor drive structure.

9. The twin-screw coupling device for improving the uniformity of lithium-ion coating surface density according to claim 1, characterized in that, The twin-screw coupling device also includes fasteners for securing the feed assembly and a protective kit for rust prevention of the feed assembly.

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