With the precise battery cell insulation tester 11210 in conjunction with the partial discharge option A112100, the leakage currents of batteries, dry cells, ELDC (Electric Double Layer Capacitors = supercapacitors) and LIC (Lithium Ion Capacitors) can be measured in the millisecond range. In addition to the standard LC / IR measurement (Leakage Current / Insulation Resistance), 11210 has the unique function of detecting partial discharges (PD, partial discharge) and flashovers that can occur inside the insulation material during the testing of the high-voltage insulation. Defective products must be sorted out in the production process before they are filled with the electrolyte. Option A112101 additionally enables the display of the voltage and current curve as well as the recording of PD events with up to 10 images per measurement process.
A sufficiently large charging current is crucial for a high test throughput in the production process. For example, the automated insulation test on the individual DUT can be carried out within 20 ms using the "Charge-Stay-Check-Unload" steps. Leakage currents can be measured from 10 pA to 20 mA in seven current measuring ranges. With the insulation tester 11210, both functions - LC / IR measurement and the detection of partial discharges - are possible simultaneously with one measurement process.
Conventional test systems usually do not differentiate whether a DUT is contacted correctly. Especially with DUTs with a very high internal resistance, a reliable contact check is essential to avoid false positive measurement results. With the integrated function for contact testing, you can exclude contact errors with the 11210 insulation tester within 5 ms before or after the actual insulation test.
Detection and measurement of partial discharge A constant current (CC mode, constant current) is applied to the DUT during the charging process, the linearity of the voltage increase being checked and an error message being generated in the event of deviations. If the charging voltage is reached, the current is measured in CV mode (Constant Voltage) in order to identify deviations due to leakage current. This way, short circuits in batteries can be reliably detected. Partial discharge detection includes: displaying the partial discharge level and frequency of occurrence, monitoring the partial discharge events during charging and during the dwell phase, programmable partial discharge level limits and logging the partial discharge and V / I waveform (option A112101).