Abstract: An encapsulated battery cell and a battery cell arrangement are disclosed herein. In one example, an encapsulated battery cell is disclosed including a battery cell of cylindrical shape, and a structure, such as a polygonal structure or a hexagonal structure, and surrounding said battery cell in a plane transverse to a longitudinal axis of said battery cell. The encapsulated battery cell further includes an insulating material located in a space between said structure and said battery cell. Said insulating material has a relatively low thermal conductivity of less than 0.3 W/(m*K) at 800° C. Said structure is made from a heat distributing material having a relatively high thermal conductivity of more than 150 W/(m*K) at 25° C. In one example, a battery cell arrangement is disclosed with a plurality of such encapsulated battery cells contained in a meta structure (e.g., honeycomb) made from said heat distributing material.