1 Channel application for quick testing of battery cells

• 100 % incoming inspection of small cylindrical cells, e.g., 18550 for small mobile devices
• Rapid cell validation through open-circuit voltage and internal resistance measurement and evaluation
• Measurement data acquisition via fieldbus and/or USB

Task

Battery cells with elevated internal resistance generate more heat. This heat accelerates chemical aging processes, which manifest, for example, as capacity loss and increased internal resistance. Resistance can change during transport or handling. Manufacturing process errors can trigger self-discharge processes. To ensure consistent quality during the assembly of small mobile devices and the integration of batteries, test specimens are removed at individual workstations and subjected to a rapid test for AC and DC internal resistance, including cell voltage and temperature measurements.

Measuring and evaluation parameters
U_cell = 3.6 … 3.8 V
R_AC (1 kHz) = 23.50 … 24.88 mΩ
R_DC (10 Hz) = 24.80 … 25.45 mΩ
ϑ = 20 … 29 °C