Cylindrical Battery In-Situ Volume Swelling Testing System

 Products Description 

Characteristic

1. Optical lmaging+ 3D Reconstruction + Real-time Online Monitoring

2. Non-contact, Non-destructive

3. High-throughput testing, suitable for mass production

4. Real time reconstruction of battery surface morphology and calculation of volumedeformation during charge and discharge processes.

5. Combining voltage and current data todetect and predict battery health condition from a higher dimension.

Applications

1. Material evaluation
2. Structural evaluation
3. Evaluation of different working conditions such as temperature, rate, storage, etc.

Description

1. Significance of Volume Swelling Testing for Cylindrical Battery

Significance: During the charge and discharge processes of lithium ion batteries, as lithium ions intercalate and deintercalate into the positive and negative electrode materials, the cell undergoes reversible expansion and contraction. Concurrently, various side reactions occur, such as particle fracture, SEI membrane rupture, cell deformation, lithium plating, gas evolution, etc., resulting in irreversible deformation.

Limitations of Existing Methods: Curently, there are several methods available to characterize the expansion of cylindrical batteries, such as vernier calipers cordinate measuring machines, presure fims, strain gauges, and imaging analysis technigues (including CT scanning, neutron imaing, X-ray, ultrasound etc.) However, these methods suer from low accuracy, inability to conduct in-situ testing, and inability to acurately and comprehensively describe the expansion behavior of cylindrical batteries.

Application Scenarios: Material evaluation, evaluation ofthe modification results of silicon anode, high-nickel ternary, lithium-rich manganese-based and other materials used in cylindrical batteries; structural evaluation, evaluation of cylindrical battery core structures of different sizes, rolled core structures. and shell rupture risk assessment; Working condition evaluation, evaluation of working conditions at different temperatures, charge/discharge rate, storage, etc.

2. Product Features

1) Opticallmaging+ 3D Reconstruction + Real-time Online Monitoring
2) Non-contact, Non-destructive
3) High-throughput testing, suitable for mass production

Real-time reconstruction of battery surface morphology and calculation of volume deformation during charge and discharge processes. Combining voltage and current data todetect and predict battery health condition from a higher dimension.

3. Leading Technology

Application Cases

Swelling Testing of cells with Different Silicon Contents

The volume swelling curve during formation shows that as the silicon content increases, the volume sweling during formationprocess increases, and the peak corresponding to lithium intercalation on the diferential capacity curve becomes higher

 Technical Parameters