1. Abstract A roll-to-roll process was developed to fabricate a composite lithium metal batteriesthat exhibits near-zero volume expansion during cycling. The anode uses a sandwich architecture—an electronic-insulating top layer, a porous middle host that accommodates plated lithium, and a lithiophilic…
1. Preface Lithium-ion battery is an electric-heat-force coupling system, which has swelling problems in the actual use process. On the one hand, the SEI film is formed, and the air pressure inside the battery increases, and the thickness of the SEI…
1. Introduction Gas generation is an unavoidable phenomenon during the battery manufacturing process and its usage, occurring in various stages such as formation, cycling, overcharging, over-discharging, and storage. Different working conditions require different levels of gas generation and different gas…
Abstract This prismatic case study uses an in-situ swelling analyzer (SWE2110) to quantify swelling force and surface temperature of LiFePO4/graphite prismatic cells (40 Ah) under different initial preload conditions (60 kg / 90 kg / 120 kg) and charge/discharge rates (1C, 1.5C, 2.5C).…
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…
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