Square (or prismatic) lithium batteries are widely used in energy storage systems and electric vehicles due to their compact design and high energy density. Unlike cylindrical cells, square batteries adopt a layered structure that allows for better space utilization inside battery packs.

The housing is typically made of aluminum alloy, providing both strength and lightweight characteristics. Inside, positive and negative electrodes are stacked with separators and soaked in electrolyte, ensuring stable ion movement. This structure enhances safety, reduces heat generation, and allows for higher capacity within limited space.
Thanks to their reliability and design flexibility, square lithium batteries are becoming the preferred choice for residential, commercial, and industrial energy storage applications.