Inbound Lithium Cell Quality Verification and Acceptance Sampling Protocols
Verify inbound cell compliance using ISO 2859-1 sampling, microvolt OCV screening, K-value decay tracking, and UN 38.3 audit chains before pack assembly.
X-Ray CT Scanning
Meaning
Non-destructive three-dimensional imaging inspection visualizes internal structural geometry and mechanical defects inside sealed battery assemblies. High-resolution computed tomography performed during x-ray ct scanning creates volumetric cross-sections that reveal internal electrode alignment, tab weld integrity, pouch sealing and active material delamination without destroying the cell housing. Quality control engineers use non-destructive imaging to detect internal voids, electrode overhang misalignments, separator pinholes and foreign metallic particles.
Imaging evaluates spatial internal structure without directly measuring chemical composition or ionic conductivity.
Failure Analysis
Post-test cell teardowns risk disturbing fragile internal degradation structures through physical cutting and mechanical exposure. Failure analysis laboratories deploy x-ray ct scanning to inspect post-mortem cells non-destructively, identifying micro-cracks, electrode buckling, active material delamination and lithium plating regions in their native state. Visualizing internal structures aids root-cause failure identification after safety incidents.
Quality Assurance
Inline and offline inspection systems verify internal geometric parameters for premium battery products during mass production. Engineering teams rely on x-ray ct scanning to audit electrode overhang consistency and tab attachment quality across pilot production lots. Detecting mechanical defects early prevents field failures and product recalls.
Resolution Threshold
Advanced micro-tomography systems achieve sub-micron spatial resolution capable of identifying minute metal contaminants and micro-cracks inside dense electrode stacks. High resolution increases scanning time per unit, limiting full sub-micron scans to sample auditing.