System and method for battery insulation

An assembly of tubular cell insulator casings comprising:

• a plurality of tubular cell insulator casings, wherein each cell insulator casing is open at a top end and configured to surround at least one of a plurality of electrically interconnected electrochemical cells, wherein said plurality of tubular cell insulator casings comprises a monolithic unit;
• a plurality of insulator plugs, wherein at least one of said plurality of insulator plugs:
• corresponds to said at least one of said plurality of tubular cell insulator casings;
• is positioned below said at least one of said plurality of tubular cell insulator casings;
• is configured to support and to insulate said electrochemical cell corresponding to said at least one of said plurality of tubular cell insulator casings;
• and
• a sump plate configured to support said plurality of insulator plugs.