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Application Note: Effect of mechanical nail penetration on battery thermal stability
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: Battery life-time testing with BTC
The useful life of a battery can be determined by connecting to a power supply that can do the charging and then connected to an external load, to discharge it. Using charging and load units that are computer controlled, this was done to a Li-ion battery situated inside an adiabatic reaction calorimeter.
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: Runway Li-ion battery explosion during charging / discharging
The rate at which batteries are charged and discharged is limited by many factors including safety. If excessive rates of charging and discharging are used, the battery can overheat and potentially lead to a runaway explosion. A battery connected to a computer controlled cycler was used to investigate this potential with the battery placed in a Battery Testing Calorimeter (BTC) that operates adiabatically.
Minimisation of Scale-up Difficulties
This article discusses what chemists and engineers can do in advance, both in the laboratory and kilo laboratory, to prevent or at least minimise scaleup issues. Scale-up of chemical processes, particularly those involving batch or semi-batch manufacture is well-known to be a problematic area of chemistry and chemical engineering, and can be costly when it goes wrong. By correctly choosing and designing the synthetic route to a fine chemical or drug substance, as well as controlling the reaction and work up/product isolation parameters, many of the difficulties in scale up can be avoided. The more complex a process is in terms of chemistry and unit operations, the more there is to go wrong.
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)
The Design of Safe Chemical Processes
A typical process in the pharmaceutical and related industries consists of a number of sequential steps where a range of carefully selected compounds are allowed to react in order to produce the required product or intermediate. In many cases, the reactions involved are exothermic, and therefore require cooling and careful process control in order to ensure safe operation. In addition, some of the raw materials or products may be unstable and have a tendency to thermally explode under certain operating conditions.