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…
In this paper, the in-situ swelling analyzer (SWE) is used to test the swelling force and the temperature change of the LiFePO4 prismatic cells under different initial preload (60kg/90 kg/120 kg) and different charge and discharge rates of the LiFePO4…
1. Preface With the continuous improvement of the endurance requirements of new energy vehicles, battery anode materials are also developing in the direction of high energy density. Although the traditional graphite anode material has mature technology and low cost, its…
1. Preface In recent years, lithium-ion batteries have been widely used in consumer electronics, electric vehicles, energy storage power stations and other fields due to their high specific capacity and safety. As people’s demand for battery capacity is getting higher…
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. Preface In this paper, the in-situ swelling analyzer (SWE) is used to test the thickness of NCM cell(523/graphite cells): theoretical capacity 2400mAh under different constant pressure conditions (50N/500N/1000N) to compare and analyze the swelling behavior of the NCM cells.…
1. Preface With the continuous development of new energy vehicles, people have put forward higher requirements for the vehicle’s cruising range and service life. How to arrange more batteries in a limited space, engineers follow the idea of “removing modules…
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. Preface Because of its high energy density, NCM materials have become the first choice of cathode materials for most power batteries. The ratio of Ni/Co/Mn has an important influence on the performance of the battery 1-2. As shown in…
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