HEL Group (United Kingdom)
HEL Group (United Kingdom) is a company in Borehamwood, United Kingdom.
Which battery testing instrument do I need?
“It depends on what you are trying to learn. If you need to know how a cell fails — onset of self-heating, thermal runaway, pressure rise, gas evolution and propagation — you need adiabatic calorimetry: the BTC-130 for cell components, coin cells and small cells, the BTC-500 for full cells, modules and small packs.”
View in the company profileWhat is the difference between adiabatic and isothermal calorimetry?
“Adiabatic calorimetry tracks the sample temperature so that no heat is lost to the surroundings. A self-heating reaction therefore accelerates exactly as it would in a large cell or pack, giving worst-case onset temperature, self-heat rate, adiabatic temperature rise and pressure data.”
View in the company profileAre the BTC calorimeters ARC-type battery calorimeters?
“Yes. The BTC-130 and BTC-500 are adiabatic (ARC-type) battery calorimeters: they track the cell temperature so no heat is lost, and measure onset temperature, self-heating rate (dT/dt), critical temperature and adiabatic temperature rise through to thermal runaway.”
View in the company profileWhy not just use an environmental chamber?
“An environmental chamber holds a set temperature, so it carries the cell’s own heat away. Self-heating is damped, onset temperatures look higher than they are and runaway rates are under-estimated — and the cell’s pressure and gas behaviour is not measured at all.”
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