19311

Accurate Assessment of Battery Cell Insulation Quality

The Chroma 19311 Surge Tester Series is a powerful tool for testing the insulation quality of lead-acid battery cells before electrolyte injection. With its ability to apply high-voltage pulses, it enables accurate assessment of the insulation quality between the positive and negative plates, as well as the insulation quality of laser-cut trims on metal film resistors.

The 19311 series has a maximum pulse output voltage of 6kV, four-wire voltage measurement, and a high-speed sampling rate of 200MHz, suitable for surge testing of battery cells as well as metal film resistors. Users can select either the single-channel tester (Model 19311) or the multi-channel scan tester (Model 19311-10) to meet their specific testing needs.

The 19311-10 model has 10 channels and can switch between multiple battery cells using a scan test method, with a single unit capable of testing up to 9 battery cells at a time. The 19311-10 can support up to 25 channels for testing up to 24 battery cells in a sequence by connecting with a Chroma 190362 external scanning box. Quickly scanning and testing multiple battery cells at a time leads to significant savings on testing time and labour costs, making this instrument particularly suitable for use on production lines to increase throughput.

The main purpose of using high-voltage pulses to test the positive and negative plates of lead-acid battery cells before electrolyte injection is threefold: to detect the distance and quality of the insulation between the positive and negative plates in battery cell, to verify the presence of a
separator and a short circuit between the positive and negative plates, to find out inferior or bad battery cells. The Chroma 19311 Series analyses the insulation quality of battery cells using their internal inductance and high-voltage oscillation damping.

Key Features:

• Max. output voltage: 6kV (Depends on DUT's capacitance)
• Pulse interval: 30ms - 3000ms
• 8 types of judgements:
  • Area
  • Differential Area
  • Flutter
  • Laplacian
  • 1st Peak Voltage (V1)
  • 3rd Peak Voltage (V3)
  • Peak Ratio
  • ΔPeak%
• Contact Check
• Breakdown Voltage Mode (BDV Mode)
• Sampling rate: 200MHz
• Support up to 25 channels for scanning test (19311-10 with A190362 option)
• User interface:
  • English
  • Traditional Chinese
  • Simplified Chinese
• Support USB flash driver
  • Waveform, test conditions and Test results storage
  • Screen capture
  • Backup files
• Graphical colour display
• Standard remote interface LAN, USB & RS232