Battery Internal Resistance Tester

Product Overview

This battery internal resistance tester is a precision benchtop instrument for simultaneous measurement of battery AC internal resistance and DC open-circuit voltage. Its four-wire measurement principle, high-performance microprocessor control, and low-temperature-drift integrated circuit design support stable low-resistance measurement where lead resistance and contact variation can otherwise compromise results. The equipment covers a wide resistance display range from 0.01 mOhm to 31.000 Ohm and a voltage display range from 0.001 V to 20.000 V.

The system is suited to product development verification, incoming inspection, process control, and automated production-line testing. It can evaluate dry cells, lithium batteries, nickel-metal hydride batteries, nickel-cadmium batteries, button cells, cylindrical cells, pouch cells, power battery packs, energy-storage batteries, and accumulators. It also measures the ESR AC impedance of supercapacitors, helping laboratories and manufacturers apply a consistent electrical screening method across diverse energy-storage products.

Built for demanding, repeated testing, this unit combines fast response, selectable sampling speeds, comparator-based sorting, and flexible trigger options. The supplied system consists of a main tester and test leads, while communication and Handler I/O interfaces enable practical connection to factory automation equipment. Clear color display presentation, full-range short-circuit zeroing, and automatic or manual resistance-range selection help maintain dependable operation during routine quality and engineering workflows.

Key Features

• Four-Wire AC Resistance Measurement: The equipment uses a four-wire test method to measure AC internal resistance, reducing the influence of test-lead and contact resistance in low-resistance battery applications. This architecture is particularly valuable when evaluating cells and packs where small resistance differences matter.

• Simultaneous AC-IR and DC-V Measurement: AC internal resistance and DC voltage are measured together, allowing operators to review two essential electrical parameters in one test cycle. This supports faster inspection decisions without requiring separate resistance and voltage instruments.

• Wide, High-Resolution Resistance Coverage: Three resistance ranges of 300 mOhm, 3 Ohm, and 30 Ohm cover measurements from 0.01 mOhm to 31.000 Ohm. The 300 mOhm range provides 10 microohm resolution, supporting detailed assessment of low-resistance cell connections and battery conditions.

• Stable 1 kHz Test Source: A 1 kHz +/-0.2 Hz AC source provides a controlled measurement signal for AC internal resistance testing. The dedicated source and integrated control circuitry support repeatable comparison of batteries tested under the same inspection method.

• Precision DC Voltage Capability: The 20 V DC voltage range displays from 0.001 V to 20.000 V with 1 mV resolution. This enables voltage verification alongside resistance screening for individual cells, battery assemblies, and energy-storage devices.

• Selectable High-Speed Sampling: Four test speeds are available: slow at 3 times/s, medium at 10 times/s, fast at 30 times/s, and extra-fast at 66 times/s. Users can select a suitable balance between throughput and the applicable accuracy additions for development, inspection, or production testing.

• Comparator Sorting and Record Storage: Thirty programmable records and 10-grade sorting support repeatable pass/fail classification. Resistance and voltage can be judged as Hi, IN, or Lo, with combined judgment presented through the interface, indicator lights, beeper, and external I/O output signals.

• Automation-Ready Interfaces: RS232, RS485, optional LAN, and Handler I/O provide multiple integration paths. SCPI and Modbus protocols are supported through RS232 and RS485, while optional LAN communication uses SCPI, giving engineering teams practical options for host control and automated equipment connection.

• Flexible Trigger Control: Internal, manual, external, automatic, and bus trigger modes support both bench testing and controlled automated sequences. This flexibility allows the unit to fit operator-led inspection stations as well as machine-paced test cells.

• Practical Operator Interface and Calibration: A 3.5-inch TFT color LCD provides direct test-result visibility. Full-range short-circuit zeroing supports correction before measurement, while automatic and manual resistance-range selection give operators control over the measurement workflow.

Applications

Technical Specifications

Why Choose This Product

• Low-Resistance Measurement Focus: Four-wire testing, a 10 microohm minimum resistance resolution, and a low-temperature-drift control-circuit design provide a strong technical basis for reliable low-resistance battery measurement.

• Efficient Electrical Screening: Simultaneous AC internal resistance and DC voltage measurement reduces handling and supports faster screening decisions across battery and supercapacitor test workflows.

• Built for Repeatable Production Decisions: Programmable comparator records, 10-grade sorting, grade counting, and multiple output indications help standardize quality-control criteria across operators and test stations.

• Integration Flexibility: RS232, RS485, optional LAN, Handler I/O, SCPI, Modbus, and five trigger modes give the equipment the connectivity needed for laboratory systems and automation-oriented deployments.

• Practical Operating Range: Three AC-IR ranges, automatic or manual range selection, selectable test speeds, and full-range short-circuit zeroing give technical teams control over measurement setup and operational throughput.

Contact us for a quote or a custom testing solution aligned with your battery research, inspection, or automated production requirements.

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