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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 […]

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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 […]

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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 […]

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