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Advantages and disadvantages of stacked lithium batteries for energy storage
Release time:
Jul 29,2024
The advantages of stacked lithium batteries for energy storage include high energy density, stable internal structure, high safety, and long cycle life.
High energy density: Stacked lithium batteries can make full use of the edge space of the battery, so in the same volume of cell design, the energy density of the cell formed by stacking is higher, compared with the winding battery, the energy density of the stacked battery can be increased by about 5 percent. Compared with wound batteries, the energy density of stacked batteries can be increased by about 5%.
Stable internal structure: Stacked batteries do not have the problem of uneven internal stress in the corners, and the expansion force of each layer is similar, so it can keep the interface flat, avoiding the deterioration of the battery interface and the problem of uneven current distribution. thus maintaining the stability of the internal structure of the battery.
High safety: Stacked batteries are subject to uniform force, and there is no bending problem at both ends, so the safety is higher. In contrast, after the bending of the pole pieces at both ends of the coiled battery, the coating material will undergo a large bending deformation, which will cause a short circuit inside the battery and thermal runaway in serious cases.
Longer cycle life: The number of lugs in stacked batteries is twice that of wound batteries, and the more lugs there are, the shorter the electron transmission distance and the lower the resistance. Therefore, the service life of stacked batteries is relatively long.
However, the disadvantage of stacked lithium batteries for energy storage is that their production process is relatively complex, which may lead to an increase in production costs. In addition, although stacked lithium batteries have many advantages, further technological improvements and cost optimization are needed in practical applications to adapt to a wider range of market demands.
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