Test System Solutions
IEST In-Situ Silicon-Based Anode Swelling Rapid Screening System (RSS1400)
The IEST In-Situ Silicon-Based Anode Swelling Rapid Screening System (RSS1400) is designed for four-channel simultaneous in-situ swelling thickness testing of silicon-based or graphite-based pouch cells, laminates, and model buttons during charge-discharge processes. It helps evaluate material and cell swelling performance with visual operation and one-click data export.
- Model Coin Cell Swelling
- Multi-layer Laminate Swelling
- Pouch Cell Swelling
Introduction
Silicon anodes offer 4200 mAh/g theoretical capacity but undergo >300% volume expansion during lithiation, continuously breaking the SEI film and causing rapid capacity fade. Silicon-carbon composites are the most industrially promising solution — but quantifying their volume expansion during charge/discharge is essential for material screening, composite design, and cell qualification.
Measurement Principle
The RSS1400 applies controlled pressure to four cell channels simultaneously while measuring thickness change in real time via high-precision displacement sensors. Expansion data is automatically synchronized with the charge/discharge curve, enabling direct correlation between electrochemical events and mechanical swelling behavior.
System Design
- Four-channel simultaneous testing with independent pressure control per channel
- Servo-motor pressure control (RSS1400) up to 100 kg with 0.1 kg / ±0.3% F.S. accuracy
- 0.01 μm displacement resolution for sub-micron thickness detection
- Compatible with model coin cells, multi-layer laminates, and pouch cells up to 60×90×4 mm
- Visual operation interface with one-click data export
- Synchronized recording of expansion thickness and charge/discharge data
