Battery Internal Resistance Testers
Measure cell health in milliseconds. ACIR and DCIR instruments for battery production QC, cell matching and formation grading.
IR Tester
Fast, Accurate Resistance Measurement on the Production Line
The VT-IR series is the battery testing equipment of choice for internal resistance verification. With both 1 kHz ACIR and high-current DCIR modes, it reliably detects welding defects, electrolyte problems and cell degradation before batteries leave your plant.
- ✓ ACIR 1 kHz measurement, 0.1 µΩ to 3 kΩ range
- ✓ DCIR pulse measurement up to 300 A for module-level testing
- ✓ ±0.5% + 3 digit basic accuracy
- ✓ 10 ms measurement speed, suitable for inline automation
- ✓ Four-wire Kelvin probes, sorting I/O and barcode scanning
Models & Specifications
VT-IR Series Model Overview
| Model | Measurement | Resistance Range | DCIR Pulse | Accuracy | Best For |
|---|---|---|---|---|---|
| VT-IR-1000 | ACIR 1 kHz | 0.1 µΩ–3 kΩ | — | ±0.5% + 3 dgt | Handheld / lab IR checks |
| VT-IR-3000 | ACIR 1 kHz + OCV | 0.1 µΩ–1 kΩ | — | ±0.5% + 3 dgt | Inline QC and sorting |
| VT-IR-5000 | ACIR + DCIR | 0.1 µΩ–300 mΩ | 10–100 A | ±0.8% + 3 dgt | Automotive cell matching |
| VT-IR-DC300 | DCIR pulse | 0.05–50 mΩ | up to 300 A | ±1% + 3 dgt | Module / pack IR testing |
All models support RS-232, RS-485 and Ethernet data output for direct integration with sorting machines.
Key Features
Why Resistance Testing Matters
10 ms Fast Test
Millisecond measurement cycle keeps pace with high-speed battery production lines.
ACIR + DCIR
Correlate 1 kHz AC resistance with DC pulse resistance for full cell health insight.
Sorting I/O
Programmable pass/fail thresholds and bin outputs drive automatic cell grading and sorting.
Kelvin Probes
Four-wire measurement eliminates cable and contact resistance from the reading.
Barcode Integration
Scan cell serial numbers and log every measurement to your MES for full traceability.
Data Software
Statistical process control charts, histogram analysis and CSV/EXCEL export.
Cell Matching
Group cells by resistance and voltage for consistent module performance.
Defect Detection
Spot weld defects, tab cracks and electrolyte degradation before final assembly.
Applications
Battery Internal Resistance Testing Applications
The VT-IR series is trusted wherever battery quality is judged by resistance.
- ✓ Incoming inspection of cells at battery pack manufacturers
- ✓ Formation and grading sorting at lithium battery factories
- ✓ Cell matching for EV battery pack assembly
- ✓ EV battery pack EOL testing in automotive production
- ✓ Battery maintenance and health checks for energy storage systems
Integrate IR Testing Into Your Line
Tell us your cell format, takt time and sorting requirements — we'll design the test station.
Request a Quote →Free application consultation · 24-hour response
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Spec an Internal Resistance Tester for Your Line
Get a quotation with probe options, fixture design and integration support — delivered within 24 hours.