Abstract : 

An electrical energy storage device for reducing heat dissipation in energy sources of an electric vehicle.  The device includes one or more cells and a thermal exchange material.  The one or more cells are arranged circularly in parallel connection on one or more first frames to form one or more blocks. The one or more blocks are electrically connected with each other in a series connection on one or more second frames to form one or more batteries.  

The one or more batteries are connected in a parallel connection to form a battery assembly.  The thermal exchange material that is adapted to enclose a central cell of the one or more cells in each of the one or more blocks.  The thermal exchange material reduces heat dissipation from the surroundings of the one or more cells by covering the heat generating tab between the one or more cells.