The role of electric powder press

In the context of the global effort to promote the energy revolution, lithium batteries, as the mainstay of the field of energy storage, are widely used in electric vehicles, portable electronic products, energy storage power stations and other fields, becoming an important force to promote the green transformation of various industries. In the complex process of lithium battery production, the lithium battery electric powder press is like a silent behind the scenes hero, playing an indispensable role.

1、what is lithium battery electric powder press

Lithium battery electric powder press is specially tailored for the production of lithium battery equipment, the main function is to press all kinds of powdered battery materials, such as positive electrode materials, negative electrode materials, solid electrolytes, etc., into sheets or components with specific shape, size and performance requirements. In the actual production process, the motor provides power to the equipment, and through the precision mechanical transmission and pressure control system, stable and precise pressure is applied to the powder material in the mold, so as to achieve the forming of the material. The quality of its pressed products directly affects the performance and quality of lithium batteries.

2、how to make powder into lithium "cornerstone"

(1) Stable power transmission system

Electric powder presses use motors as power sources, and common motor types include servo motors and stepper motors. After receiving the command issued by the control system, the motor starts to run, and the rotary motion is converted into the linear motion of the slider through the mechanical transmission device such as belt, gear, and lead screw, which provides the required pressure for the pressing of the powder material. The stable power transmission system ensures the continuity and stability of the pressing process, avoids the difference in product quality caused by power fluctuations, and plays a key role in improving the product yield.

(2) Accurate pressure control system

The equipment is equipped with high-precision pressure sensors to monitor pressure changes in real time during the pressing process and feed the data back to the control system. According to the preset pressure parameters, the control system accurately adjusts the running speed and torque of the motor to achieve accurate control of the pressing pressure. Whether it is the initial stage of low pressure molding, or the key link of high pressure densification, the pressure deviation can be controlled in a very small range. Accurate pressure control, so that the electrode compaction density is uniform, to improve the capacity of lithium battery, cycle life and charge and discharge efficiency is of great significance.

(3) Flexible temperature control system

For some temperature sensitive powder materials, the electric powder press also has a temperature control system. By embedding a heating element or cooling channel in the mold, the temperature during the pressing process can be precisely regulated. The appropriate temperature can not only reduce the deformation resistance of the powder, improve the molding quality, but also avoid the deterioration of the material performance due to high temperature, which provides technical support for the application of new materials in the production of lithium batteries.

3、Classification of lithium battery electric powder press

(1) Classification by structure

Four column electric powder press

The four-column electric powder press adopts a classic four-column structure, and the upper and lower beams are supported by four columns to form a stable frame. The slider slides up and down between the posts to complete the pressing of the powder material. This structure has strong rigidity, high stability, and can withstand large pressing force, and is suitable for large-scale production scenarios. Taking a large lithium battery production enterprise as an example, after the introduction of four-column electric powder press, the daily output has been greatly increased, and the stable operation of the equipment has effectively reduced the failure rate and ensured the continuity of production.

Frame type electric powder press

Frame type electric powder press adopts the overall frame structure, compared with the four-column, its structure is more compact, occupies a smaller area, suitable for limited space production workshop. In addition, the mold replacement operation of the frame electric powder press is more convenient, and it can quickly adapt to the production needs of different products, which provides convenience for enterprises to flexibly adjust their production strategies.

(2) Categorize by function

Ordinary electric powder press

The ordinary electric powder press has basic pressure control and molding functions, and is suitable for production scenarios with relatively low product accuracy and performance requirements. Its low cost, simple operation, reduces the production threshold of enterprises, provides an economic and practical choice for some small enterprises or production projects in the initial stage, and promotes the diversified development of the lithium battery industry.

Precision electric powder press

The precision electric powder press is equipped with advanced control system and high-precision sensor, which can realize the precise control of the pressing process and meet the production needs of high demand products such as high energy density battery electrode. In the development and mass production process of high energy density batteries, precision electric powder presses have played an important role in promoting electric vehicles and other fields to break through the endurance bottleneck.

4、the important role in lithium battery production

(1) The "main force" of electrode sheet production

In the production process of lithium battery electrode sheet, electric powder press plays a core role. Positive materials such as lithium iron phosphate, ternary materials, and negative materials such as graphite need to be pressed to form electrode sheets with a certain compaction density. The level of compaction density directly affects the performance of lithium batteries, and the precise pressing of the electric powder press ensures the uniform compaction density of the electrode sheet, which lays the foundation for improving the overall performance of lithium batteries. Taking the field of new energy vehicles as an example, the high-performance lithium battery provides a strong and stable power support for the vehicle, and the electric powder press plays an important role in it.

(2) "escort" for the preparation of battery separator

Battery diaphragm is an important part of lithium battery, its main role is to prevent the positive and negative short circuit. Some diaphragm materials need to be pressed by electric powder press in the production process to improve their mechanical strength and barrier properties. The high-quality battery separator produced by electric powder press effectively reduces the risk of short circuit of lithium battery, improves the safety and stability of the battery, and provides a guarantee for the application of lithium battery in more fields.

(3) "booster" for solid-state battery industrialization

With the development of solid state battery technology, electric powder press is more and more widely used in solid state battery production. As the core component of solid state battery, solid electrolyte needs to be pressed to form a thin sheet with good ionic conductivity and mechanical properties. The electric powder press can meet the high-precision requirements in the solid electrolyte pressing process, provide strong support for the industrial production of solid state batteries, and accelerate the process of solid state batteries from the laboratory to the market.

5、Linkage with other devices

(1) Synergies with mixers

Before pressing, the powder material needs to be fully stirred through a blender to ensure that the components are evenly mixed. The mixer transmits the mixed powder to the electric powder press, and the two are linked with the help of an automated control system. This collaborative operation not only ensures the quality of powder materials, but also improves production efficiency and reduces energy consumption and costs in the production process.

(2) Seamless connection with the coating machine

The pressed electrode sheet needs to be coated with a layer of active material. The electric powder press and coating machine achieve seamless connection through the transmission device, and the pressed electrode sheet is smoothly transmitted to the coating machine, which optimizes the production process, reduces the quality problems caused by human intervention, ensures the stability of product quality, and further improves the overall production efficiency.

6、Future development direction

(1) The wave of intelligence is coming

With the development of artificial intelligence, big data and other technologies, lithium battery electric powder press will move in the direction of intelligence. The future electric powder press will realize automatic control and remote monitoring, and the equipment can automatically adjust the pressing parameters according to the production data, timely discover and solve the problems in the production process, further liberate the manpower and improve the degree of refinement of production.

(2) High precision is inevitable

With the continuous improvement of the performance requirements of lithium batteries, the accuracy requirements of electric powder presses are becoming increasingly stringent. The future electric powder press will use more advanced manufacturing processes and high-precision sensors to further improve the pressing accuracy, meet the demand for high-quality products in lithium battery production, and promote the continuous progress of lithium battery technology.