Lithium-ion batteries (LIBs), including LFP and NMC types, consist of alternating layers of cathodes, anodes, and separators housed within a case. X-ray inspection is crucial for verifying their quality, as internal defects can lead to serious safety issues. These defects, such as particle contamination or improper electrode winding, can cause short circuits, potentially resulting in fires.
The positive and negative electrodes, as well as the separators in lithium-ion batteries, are made of thin, low-density organic materials that are highly transparent to X-rays. Therefore, a high-dynamic-range X-ray detector is essential for clear imaging. Matsusada Precision's benchtop and stationary X-ray inspection systems are equipped with a high-resolution Flat Panel Detector (FPD) featuring a 14-bit grayscale depth, enabling detailed observation of the battery's internal structure.
Observing foreign matter in the tens-of-micrometers range or defects on the edges of electrode films requires image magnification of over 100x. Our systems utilize microfocus X-ray sources with a minimum focal spot size of 4 µm, ensuring sharp, unblurred images even at high magnification, which is ideal for detailed defect analysis.
Matsusada Precision provides both horizontal and vertical X-ray inspection systems. The horizontal irradiation type is ideal for inspecting cylindrical lithium-ion batteries, while the vertical type is suited for pouch and prismatic cells. We also offer advanced micro-CT scanners for detailed 3D analysis and in-line industrial X-ray systems for process control in manufacturing. These systems are also effective for inspecting electrolytic capacitors, which share a similar wound structure.
| Focal Spot Size | Microfocus |
|---|---|
| Tube Voltage | 90 to 130 kV |
| Geometric Magnification | 1 to 100x |
