See all authors As the energy density of lithium-ion cells and batteries increases, controlling the outcomes of thermal runaway becomes more challenging. If the high rate of gas generation during thermal runaway is not adequately vented, commercial cell designs can rupture and explode, presenting serious safety concerns.
Among all cell components, the battery shell plays a key role to provide the mechanical integrity of the lithium-ion battery upon external mechanical loading. In the present study, target battery shells are extracted from commercially available 18,650 NCA (Nickel Cobalt Aluminum Oxide)/graphite cells.
Additionally, for the study of lithium-ion batteries with internal short circuits, we need to pay more attention to the maximum temperature and temperature rise rate of the battery. In this section, experiments and analysis were conducted on cells A and B at 40 % SOC without thermal runaway.
Under mechanical abuse conditions, the failure of cylindrical lithium-ion batteries is a rapid process with random characteristics, which are related to the battery's SOC, electrode thickness, electrode materials, thermal-electric performance and electrochemical performance components.
These dendrites have the ability to pierce the separator, resulting in internal short circuits, lowering the battery’s total capacity and jeopardizing the lithium-ion battery’s functionality and safety.LiPF 6 salt is included in most battery electrolytes .
The cylindrical lithium-ion battery has been widely used in 3C, xEVs, and energy storage applications, as the first-generation commercial lithium-ion cells. Among three types of lithium-ion cell format, the cylindrical continue to offer many advantages compared to the prismatic and pouch cells, such as quality consistency and cost.