Abstract Silicon anodes undergo approximately ~300% volume expansion during lithiation — a fundamental challenge that silicon-carbon (Si-C) composite designs partially mitigate but cannot eliminate. In a 50-cycle in-situ swelling study on pouch cells with 3 wt.% and 5 wt.% silicon content, cumulative silicon…
Abstract EIS testing on LCO/graphite pouch cells shows that module-level compression pressure increases low-frequency impedance and charge transfer resistance ($R_{ct}$), and this effect is strongest at low state of charge (SOC) and much weaker at high SOC. Using an IEST…
1. Preface The in-situ swelling analyzer (SWE) launched by IEST has constant pressure and constant gap test modes, which can monitor the thickness evolution of the cell under constant pressure or monitor the change of pressure under a limited constant…
1. Abstract This study utilizes an In-situ Swelling Analyzer (SWE) to investigate the thickness evolution of an NCM cell under varying constant pressure conditions (50N, 500N, 1000N). The analysis focuses on correlating swelling behavior with applied pressure and electrochemical characteristics.1…
Abstract Blade battery technology refers to a long, thin, blade-shaped lithium-ion cell format — most commonly using lithium iron phosphate (LFP) chemistry — that is embedded directly into the battery pack without conventional module housings, improving pack-level energy density and mechanical…
In this paper, an IEST in-situ volume monitor (GVM) is used to carry out in-situ overcharge volume test under different charging rate conditions (0.5C) on lithium cobalt oxide/graphite batteries (theoretical capacity 1000mAh), and compare and analyze the cell gas production…
1. Abstract Nickel-rich Lithium Nickel Cobalt Manganese Oxide (NCM Material) is a leading cathode choice for power batteries due to its high energy density. The Ni/Co/Mn ratio critically influences performance1-2, but high-Ni compositions raise the risk of gas generation (NCM…
Abstract This study uses an in-situ gassing volume monitor(GVM2200) to analyze the volume changes of two different electrolyte systems in NCM811 ternary cathode cells during high-temperature cycling, providing a direct method for R&D teams to evaluate electrode material volume change stability and screen…
Abstract Pouch cell swelling refers to the reversible and irreversible dimensional changes—in volume and thickness—that occur during lithium-ion intercalation and de-intercalation. Reversible swelling arises from lattice expansion during cycling and localized thermal effects; irreversible swelling originates from gas evolution and…
Abstract In-situ gas evolution testing of lithium-ion pouch cells measures real-time volume change during formation and initial charging using the Archimedes principle of buoyancy, allowing researchers to distinguish how different electrolyte additives affect formation gassing without disassembling the cell. This article interprets the…
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