1. Introduction

In the lithium-ion battery manufacturing process, the mixing quality of electrode pastes directly affects the electrochemical performance and cycle stability of the battery. Meanwhile, the mixing uniformity of functional materials such as ceramic materials is crucial for their subsequent application effects. Traditional mixing equipment tends to entrap air during operation, resulting in problems such as insufficient material density and poor fillability, which restrict the improvement of product performance. Therefore, the development of laboratory-scale mixing equipment with vacuum environment control and high-efficiency dispersion capabilities has become an important research direction in the field of material preparation. The vacuum mixing equipment designed in this paper addresses the needs of small-batch material processing in laboratories, balancing dispersion efficiency, operational convenience, and space adaptability, thus providing technical support for experimental research on related materials.

2. Equipment Structure and Core Features

2.1 Sealing Structure Design

The equipment adopts a soft sealing process, and through the optimized design of the sealing contact surface, excellent sealing performance is achieved. This design ensures the stability of the vacuum environment during the mixing process, effectively preventing air infiltration and laying a foundation for bubble-free mixing.

2.2 Power Regulation System

The mixing power unit is equipped with a gearbox and a variable-frequency speed control module, which can flexibly adjust the stirring speed according to the physical properties of different materials (such as viscosity, particle size, etc.). The application of variable-frequency speed control technology enables the equipment to adapt to the mixing needs of diverse materials, ensuring sufficient dispersion of high-viscosity materials while avoiding splashing of low-viscosity materials caused by excessive stirring speed.

2.3 Optimization of Stirring Mechanism

A double-blade structure design is adopted. By reasonably planning the blade angle and arrangement, the shearing and convection effects of materials are enhanced, realizing rapid and uniform mixing of pastes. The double-blade design not only improves mixing efficiency but also reduces material residue in the container, increasing material utilization.

2.4 Compact Layout

The equipment adopts an overall miniaturized design. On the premise of ensuring core functions, the overall dimensions are compressed to the maximum extent, featuring a small footprint and strong space adaptability. At the same time, the equipment has a simple appearance and an intuitive operation interface, facilitating installation, commissioning, and daily maintenance in laboratory scenarios.

3. Key Technical Parameters

The core technical parameters of the equipment are optimally designed to match the needs of small-batch material processing in laboratories, with specific parameters as follows:

u Input Voltage: AC220V / AC110V dual-voltage adaptation, meeting the power supply environments of different laboratories;

u Rated Power: 150W, ensuring mixing power while achieving low-energy operation;

u Stirring Speed: 0~320 RPM, supporting variable-frequency stepless speed regulation to adapt to diverse materials;

u Vacuum Degree: Up to -90~-95Kpa, providing a stable vacuum environment for bubble-free mixing;

u Material Container: Equipped with a 150ml stainless steel vacuum tank, the material has corrosion-resistant and high-temperature-resistant properties, and can be customized with containers of different volumes according to experimental needs;

u Mixing Time: 0~9999 minutes, freely adjustable to meet the mixing process requirements of different materials;

u Oscillation Mode: Supporting stepless speed regulation oscillation, further enhancing the dispersion effect of materials;

u Overall Dimensions: Approximately 330mm×310mm×510mm, with a compact structure to save laboratory space;

u Equipment Weight: Approximately 20kg, facilitating movement and position adjustment.

4. Application Scenarios and Advantages

This equipment is mainly suitable for laboratory-scale mixing of lithium-ion battery electrode pastes, and can also be widely used in various scenarios requiring bubble-free and high-uniformity mixing, such as various ceramic materials and functional coatings. Its core advantages are reflected in the following aspects:

u Mixing operations in a vacuum environment effectively eliminate bubbles in materials, significantly improving the fillability and density of materials, and providing high-quality raw materials for subsequent processing processes (such as coating, molding, etc.);

u The combination of variable-frequency speed regulation and double-blade design realizes the coordinated optimization of mixing efficiency and mixing quality, shortening the experimental cycle;

u The miniaturized, lightweight design and dual-voltage adaptation capability give it good versatility and scenario adaptability, meeting the diverse needs of different laboratories;

u The equipment provides a one-year limited warranty and lifetime technical support, ensuring the continuity and stability of experimental work.

The laboratory-scale small vacuum mixing equipment designed in this paper achieves bubble-free, high-efficiency, and high-uniformity material mixing through the integrated application of key technologies such as optimized sealing structure, variable-frequency speed regulation technology, and double-blade stirring mechanism. Its compact structural design, flexible parameter adjustment capabilities, and wide applicability make it an ideal equipment for laboratory research in fields such as lithium-ion battery materials and ceramic materials. The application of this equipment will help improve the stability and reliability of experimental-level material mixing, providing strong support for performance optimization and process innovation of related materials. In the future, the volume adaptation range of the equipment can be further expanded, and intelligent technologies can be integrated to realize automatic control and data tracing of the mixing process, thereby improving the intelligence level of the equipment.