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DV Power battery internal resistance tester IBAR is a handheld, accurate, and very quick resistance tester. It determines the state of health of batteries by taking measurements of important battery parameters such as battery internal resistance, cell voltage as well as inter-cell connection resistance. IBAR can be used as a support tool during the capacity test for cell voltage measurement.
It is an ideal testing tool for maintenance, troubleshooting, and performance tests on individual stationary batteries and battery packs in critical backup energy solutions. This includes flooded lead-acid, VRLA, Ni-Cd or Li-Ion types of batteries.
IBAR is intended for measurements on fully offline batteries, i.e. batteries disconnected from both the charger and any load.
When a user starts the test, IBAR automatically detects the resistance range. Based on set criteria, it displays a pass/warning/fail indication during the test. Furthermore, it saves all the measurements in the internal memory for later analysis.
Using DV-B Win software, it is possible to download results from the device’s internal memory to a PC and to generate graphical reports for historical trend comparison and further analysis.
A Battery Internal Resistance Tester is used to evaluate the condition and health of battery cells by measuring internal resistance, cell voltage, and inter-cell connection resistance. These measurements help identify weak or aging batteries before failure occurs.
Internal resistance is one of the most reliable indicators of battery condition. As batteries age, their internal resistance typically increases, reducing capacity and affecting overall system performance.
The IBAR measures battery internal resistance, cell voltage, inter-cell connection resistance, and battery string voltage, providing a comprehensive assessment of battery health.
Yes. Internal resistance testing helps identify deteriorating cells that may still appear normal during voltage measurements but are no longer capable of delivering reliable performance.
Voltage measurements alone may not reveal developing battery problems. Internal resistance measurements provide deeper insight into battery condition and often detect degradation much earlier.
The IBAR is suitable for testing VRLA batteries, flooded lead-acid batteries, Ni-Cd batteries, lithium-based battery systems, and other stationary battery applications.
Yes. Internal resistance testing is non-invasive and can typically be performed without disconnecting the battery from service, reducing downtime and maintenance costs.
Inter-cell connection resistance indicates the quality of electrical connections between battery cells. High resistance may indicate loose, corroded, or damaged connections that can cause heating and performance issues.
The IBAR helps maintenance teams identify trends in battery deterioration, schedule preventive maintenance, and replace failing cells before they impact system reliability.
Yes. The instrument is suitable for commissioning, acceptance testing, routine inspections, and preventive maintenance of battery systems.
Yes. Test results can be stored in the instrument memory and later transferred for analysis, trending, and reporting purposes.
Yes. Trending resistance values over multiple inspections helps identify gradual battery degradation and predict potential failures before they occur.
Internal resistance testing is widely used in electrical substations, power plants, UPS systems, telecommunications facilities, data centers, renewable energy installations, and industrial DC systems.
Testing frequency depends on industry standards and battery criticality, but periodic testing is recommended as part of a comprehensive battery maintenance program.
A dedicated tester provides fast, accurate, and repeatable measurements, helping maintenance teams improve battery reliability, reduce unexpected failures, and extend battery service life.
