Silicon-based negative expansion in situ fast screening system

System overview:

By in-situ monitoring the expansion behavior of silicon anode in charge and discharge process, the in situ fast screen system provides a fast and accurate evaluation method for R&D personnel. The system uses the assembly mode of the button battery for reference, and can directly measure the expansion performance of the negative electrode of the brick at the end of the pole, thus saving the labor, material and time costs of preparing the finished cell.

Main features:

In situ characterization: The system can in-situ characterize the expansion thickness changes of silicon based system cells under different pressures, providing intuitive and accurate expansion performance data for developers.

Four-channel synchronous test: The system has a four-channel synchronous test function, which can test multiple cells at the same time, improving the test efficiency.

Adapt to a variety of cell structures: The system ADAPTS to the in-situ testing of a variety of cell structures, such as model buckle, laminated battery, and soft pack battery, to meet different research and development needs.

Visual operation interface: The system is equipped with visual operation interface, which is simple and convenient to operate, and the data report can be exported with one click, which is convenient for R & D personnel to analyze and summarize.

How it works:

The operating principle of the in-situ rapid screening system is based on the expansion behavior of the silicon anode during charging and discharging. When the silicon anode is combined with lithium ion, a phase transition from crystalline to amorphous state occurs, which is accompanied by the lithium reaction leading to volume expansion. The system uses a high-precision sensor to monitor the change of silicon anode's swelling thickness during charging and discharging in real time, so as to evaluate its swelling performance.

Application example:

Taking the silicon-based negative electrode expansion in situ fast screen system of Yuanneng Technology （Xiamen） Co., Ltd. as an example, the system has been successfully applied to the expansion performance test of many silicon-carbon materials.

By comparing the expansion properties of silicon-carbon materials with different modified conditions, researchers can quickly screen out brick anode materials with excellent performance, and further promote the development of lithium-ion battery technology.

Significance and value:

The emergence of the silicon-based negative expansion in situ fast screen system has greatly improved the evaluation efficiency of the expansion energy of silicon negative electrode materials and reduced research and development costs. At the same time, the system also provides more accurate and intuitive expansion performance data for researchers and developers, which helps to promote the continuous progress and innovative development of lithium-ion battery technology.