Temp/Humidity/Vibration 3-in-1 Chamber
Model: VT-VIB-3IN1
Combined environmental stress screening with vibration.
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
Product Gallery
Customized Non-Standard Equipment
Dual Chamber Aging Oven
Model: VT-AGING-DUAL
High temperature aging test with dual independent chambers.
Altitude Simulation Chamber
Model: VT-LP-SIM
Simulates high altitude low pressure per UN 38.3 T.6.
Walk-in Low Pressure Chamber
Model: VT-LP-WALK
Large chamber for full battery pack low pressure testing.
High Altitude Low Pressure Chamber
Model: VT-LP-HIGH
Simulates altitudes up to 20,000m for transport testing.
Transport Vibration Test System
Model: VT-VIB-TRANS
Simulates road/rail/air transport vibrations per ISTA standards.
FAQ
Frequently Asked Questions
What is the difference between ACIR and DCIR?
ACIR (AC Internal Resistance) measures impedance at a fixed frequency (typically 1 kHz) using a small AC signal, which isolates ohmic resistance from polarization effects. DCIR (DC Internal Resistance) applies a brief DC pulse and calculates resistance from the voltage change, capturing both ohmic and polarization resistance. Both methods are used for cell sorting but serve different QC purposes.
What internal resistance range should I measure?
Most lithium-ion cells measure between 1 mΩ and 100 mΩ. VoltTest IR testers cover 0.1 µΩ to 3 kΩ, accommodating everything from large prismatic cells (low mΩ) to small coin cells (tens of mΩ). For cell matching, aim for ±5% or tighter consistency within a batch.
Can I use this tester for cell sorting on a production line?
Yes. VoltTest IR testers are designed for inline production use with measurement times under 100 ms per cell, RS-485/Ethernet connectivity for PLC integration and automatic pass/fail sorting outputs. They can be linked to capacity testers for combined IR + capacity grading workflows.
How accurate is the ACIR measurement at 1 kHz?
VoltTest ACIR testers deliver ±0.5% rd + 0.05% FS accuracy at 1 kHz, which is sufficient to detect resistance differences as small as 50 µΩ on a 5 mΩ cell — well within the resolution needed for battery cell sorting and quality control.
Can I integrate this with my MES or ERP system?
Yes. All VoltTest IR testers support standard communication protocols (RS-485, Ethernet, Modbus TCP) and include software drivers for MES/ERP integration. Measurement data including cell ID, resistance value, test time and pass/fail status can be automatically uploaded to your production management system.
Related Products
Complete Your QC Station
Charge/Discharge Test Systems
Full cycle life testing for incoming and outgoing cells.
View battery cycler specifications →
Electrical Safety Testers
Hi-pot and insulation resistance verification for finished packs.
View electrical safety tester specs →
Battery Capacity Testers
Capacity grading to complete your cell sorting workflow.
View capacity tester details →Spec an Internal Resistance Tester for Your Line
Get a quotation with probe options, fixture design and integration support — delivered within 24 hours.