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How Can Current Measurement Offset Make Coulombic Efficiency Appear to Exceed 100%?
One common reason that measured coulombic efficiency…
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Four notes most engineers read first.
Accuracy and Precision, Part 1: OverviewThe difference between accuracy and precision in battery testing, and why both matter.How to Measure DC Internal Resistance (DCIR)How MITS measures DC internal resistance with the pulse method, and how to set the pulse.How to Run an HPPC Test (Hybrid Pulse Power Characterization)The DOE pulse profile, resistance and pulse power equations, cycler requirements, and a worked 18650 test on the HPS.How to Use Formulas and Variables in MITS SchedulesControl a test with formulas and variables instead of fixed values.
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Battery Cell Grading and Matching: Why Measurement Precision Determines Pack Performance
Home › Resources › Application Notes › Cell Grading & Matching Application Note AN-025 Battery Cell Grading and Matching: Why Measurement Precision Determines Pack Performance Summary A battery pack is only as good as its weakest cell. In a series string, charging stops when the first cell reaches its upper voltage limit and discharging stops […]
Hybrid Pulse Power Characterization (HPPC) Testing with Arbin MITS Pro
Home › Resources › Application Notes › HPPC Application Note AN-024 Hybrid Pulse Power Characterization (HPPC) Testing with Arbin MITS Pro Summary The Hybrid Pulse Power Characterization (HPPC) test measures the pulse resistance and pulse power capability of a battery across its state-of-charge (SOC) range. This application note describes the HPPC method, the cycler characteristics […]
How to Set Up a GITT Test Schedule in Arbin MITS Software
I. Introduction The Galvanostatic Intermittent Titration Technique (GITT) is an electrochemical method commonly used to study ion diffusion behavior and transport kinetics in battery electrode materials. A typical GITT test consists of a sequence of constant-current pulses followed by open-circuit relaxation periods. During each current pulse, the cell voltage changes as the state of charge […]
How Can Current Measurement Offset Make Coulombic Efficiency Appear to Exceed 100%?
One common reason that measured coulombic efficiency (CE) can appear to exceed 100% is a current measurement offset. In this example, assume the cycler has a constant negative current offset e. This means the measured current is lower than the true current by e throughout the test. To simplify the analysis, assume an ideal battery […]
Run the cycling test until the capacity decreases to 80% of original capacity
A common end-of-life criterion for lithium-ion cells is when the measured discharge capacity falls to 80% of its initial value. This document demonstrates how to configure an Arbin test schedule to automatically cycle a cell until this threshold is reached. Overall test procedure: Initial capacity measurement → Cycling loop → Compare capacity to 80% → […]
Application Examples of User-Defined MetaVariables (MV_UD)
In Arbin software, MV_UD (short for User-Defined Meta Variables) is a powerful tool for controlling battery testers. This article explains how to use MV_UD in Arbin MITS software. Storing Values in MV_UD with SetValue(s) In the Control Type list, select SetValue(s). SetValue(s) assigns a fixed value of a physical quantity at a specific moment to […]
How to plot Potential vs Current Graph by Arbin Data Watcher
1. Introduction 1.1 Background Arbin DataWatcher is primarily used as a real-time data analysis and visualization tool. It allows users to monitor test data, plot curves, and export data files efficiently. It enables users to visualize and analyze key electrochemical parameters such as voltage, current, capacity, and time. 1.2 Purpose of This Application Note The […]
Accuracy and Precision: Impact of Precision
We previously examined the impact of measurement accuracy in an earlier article. In this article, we shift our focus to the influence of a battery tester’s precision on battery research. In many research applications, parameters such as dV/dt and dQ/dV are widely used. The reliability of these measurements depends heavily on the precision of the […]
Accuracy and Precision: Impact of battery tester’s accuracy
In the previous article, we introduced the concepts of accuracy and precision, along with a brief overview of their influence on battery testing. In this article, we will take a deeper look at the impact of accuracy. We will take an example about the impact on capacity measurement and Coulombic Efficiency measurement. As we all […]
Accuracy and precision: Overview
1. Introduction Battery testing is fundamentally a measurement task. Whether evaluating cycle life, coulombic efficiency, voltage response, or degradation mechanisms, the quality of conclusions depends on the quality of the data. Two concepts govern data integrity in any battery test system: accuracy and precision. Although often mentioned together, they describe different aspects of measurement performance. […]
Test EV Battery pack with real-time drive condition using Simulation Control types
Information and Instructions for using the Simulation control types. 1. General Description Simulation refers to the ability to input data collected from a non-formulated dynamic regime (i.e. other than Constant Current, Constant Voltage, Constant Power, Ramp, Staircase, Pulse, or Formula) as a control function. There are three control types: 1. Current Simulation – uses a […]
How to run cyclic voltammetry on three-electrode(3E) cell using Arbin Tester
I. Introduction to 3E cell In a battery with 2 electrode, when you measure the battery voltage, you measure the potential difference between the cathode and anode of the battery. In this case, you only see the total difference in potentials and do not know how much each electrode contribute to this difference. You would […]
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