Battery Testing Calorimeter (BTC) from the Process Safety Experts The PHI-TEC is able to study : -• Battery components (anode, cathode, electrolyte, SEI) • Complete batteries • Overcharged or over discharged batteries • Charged, discharged and cycled batteries Even large batteries (EV and HEV, for example) can be directly tested to obtain safety, lifecycle and electrochemical efficiency data. BTC is a special version of the Phi-TEC I Adiabatic Reaction Calorimeter, modified to enable easy and reliable safety testing of Li-ion batteries of different sizes. This is possible under different conditions of battery use as well as undesirable modes of use. Depending on battery size to be tested, “standard” and “customised” versions of the BTC are available. www.helgroup.com The system is fully software controlled with integral safety trips. A software screenshot is shown here. Stability Testing Lowest temperature at which battery starts to self-heat can be accurately determined in the standard Heat-wait-search test. To assist with chemical development, the kinetics and energy release can be easily qualified. Phi-TEC also has a second test modes where the sample is ramped and this provides quick screening data during battery development Testing to “destruction” It is a also possible to place batteries in a pressure “cell” so that the decomposition can be allowed to proceed to “destruction” -allowing gas rates and temperature increase to be measured in the event of the battery decomposing in a closed space.

“Standard” Calorimeter Compact design that can be used for battery types :          Standard Phi-TEC I Footprint 30 x 37 x 50 cm Test section 3.4cm diameter x 11cm high 18650 Prismatic Polymer Coin AA 3/4A 4/5A Battery packs Prototypes Safe to use in standard fume hood, confirmed by testing with explosives. “Custom” Calorimeter The Custom Testing Calorimeter is used for batteries larger than 18650. This Calorimeter will allow batteries up to 35cm x 35cm to be tested, and typically includes batteries for EV and HEV, military use, space aircraft and also large packs of smaller batteries....