Articles

Application Note: Battery Safety Data
BATTERY SAFETY DATA DIRECT FROM MANUFACTURER: Safety of batteries under different temperature conditions needs to be verified experimentally and "adiabatic" calorimetry is the widely accepted method. Data collected recently by MGL in China from one of their prototypes shows how under adiabatic conditions, the temperature at which a battery starts to undergo self-heating is detected and this provides the maximum safe temperature under which it can ideally be used. In addition, the calorimeter allows the battery to continue thermal runaway and hence provides direct information about the extent of the hazard.
Application Note: Battery Specific Heat Determination
Batteries are complex objects and the Cp is rarely known. Fortunately, this can be measured in an adiabatic calorimeter again using equation Q = m cp ΔT. Demonstrated in this application note.
Application note: Effect of Mechanical Nail Penetration on Battery Thermal Stability in BTC
Two separate experiments were performed in the Adiabatic Calorimeter Phi-TEC BTC to determine the thermal stability of a 3-battery, Li-ion battery pack. The objective was to compare the stability of the battery when it is complete and undamaged with the result when the batteries were penetrated with a nail.
Application note: Runaway Li-ion Battery Explosion
Application Note: Video battery Testing
The performance demands on modern batteries subject them to considerable physical stresses. HEL supply a range of battery testing systems and now include Remote Video Monitoring to record deformation, smoking and degradation in real-time...
Battery abuse testing, what they're not telling...you
When a battery goes wrong it rarely hits the headlines, and altough incidents like the recent dreamliner battery firste are infrequent, they highlight how dangerous batteries can be under the wrong conditions.
Presentation: Battery Safety Testing - Nov 2010, Beijing
A presentation made by Dr J Singh at the 5th International Forum on Li-ion Battery Technology, Beijing, China, Nov 2010, about HEL's advanced Battery Testing Calorimeter (BTC) as a unique solution for both small scale testing of battery components as well as direct simulation of larger scale battery incidents, including the "abuse" testing methods specified by various codes.
Scale Up Of Hazardous Chemistry- With Thermal Runaway Potential
This paper describes (with examples) how with a range of experimental methods and with the correct equipment, it is possible to simulate a thermal runaway. The data produced (with samples less than 100ml) can help prevent potential hazards. (As published in Chemistry Today)
Thermal Runaway in Li-ion - Getting the missing data
Most modern high energy batteries, not only Li-ion, contain highly reactive and potentially explosive chemicals as exemplified by the recent Boeing incident. Testing techniques exist that can predict these problems yet are rarely used and not widely understood.