Designed for testing the insulation quality between the positive and negative plates of a lead-acid battery cell, the 19311 applies a high voltage surge/impulse before the electrolyte injection process effectively decreasing defective rates in production. Chroma has given the surge tester an output voltage that can reach up to 6kV, has four terminal measurement, and a sampling rate of 200MHz.

The Chroma 19311 is offered in either a single channel (19311) or multi-channel (19311-10) unit. The 19311-10 has 10 channels which can test up to 9 battery cells within a single unit. Testing up to 24 cells in a sequence can be achieved by connecting the 19311 with an external scanner (A190362).

The speed of the multi-cell scanning test is extremely efficient, saving test time. By using a resonant waveform to identify insulation quality deficiencies, the 19311 can increase the capacity of good units in the production line.

The 19311’s surge test applies a non-destructive low energy impulse voltage to the lead-acid battery cell. During the surge test, the lead-acid battery cell resonates with the internal inductor in the 19311. The tester then determines if the insulation is defective or not by analyzing the resonant waveform or comparing the test waveform with a golden sample waveform. Testing the lead-acid battery cell with a high voltage surge before the electrolyte injection checks the insulation distance and the insulation quality between the positive and negative plates, determines the integrity of the separator between the positive and negative plates, and identifies if the positive and negative plates are shorted.

Chroma’s 19311 series analyzes the differences of the insulation quality from the resonant waveform using 8 types of judgements for analysis: Area, Diff-Area, Flutter, Laplacian, V1, V3, Peak Ratio and ΔPeak%.