Hel's Phi-tec Battery-Testing Calorimeter (BTC) is built inside a steel pressure chamber with 2.5cm-thick cylindrical walls, to withstand batteries exploding during ARC testing and to increase safety.
Larger-scale testing of Li-ion batteries for thermal hazards is performed in adiabatic calorimeters, and sometimes referred to as ARC testing.
Because huge amounts of energy can be released when batteries explode, Hel designed its BTC to withstand such risks.
Compared with only 2mm flat plates on the competing brand, the wall thickness of Hel's calorimeter equates to a 50-fold pressure-difference rating.
Built as a chemical pressure vessel, the BTC also has the safety features associated with such, including mechanical relief valves and software-actuated inert purge/quench, in the event of a problem.
