Cell assembly

During winding or stacking, electrode position, tension, separator coverage, and edge condition jointly determine internal spacing and contact risk. Assembly should not be judged only by appearance; build an validation trail with process parameters, alignment checks, and defect samples.

Moisture and impurity control, drying history, fill quantity, vacuum, and soak time affect electrolyte distribution and later interphase formation. Actual state at each step should be recorded so formation anomalies can distinguish material, assembly, and electrolyte causes.

Tab welding, enclosure packaging, and seal integrity affect both conduction and medium isolation over lifetime. Evaluation should combine process data, non-destructive or destructive inspection, and correlation with later electrical performance.