Batteries are essential power sources for every app lication from your new MP3 player, to the development of carbon neutral transp ortation. As demand for new and more powerful battery packs grows so do materia ls requirements. Setaram offers you a broad range of technologies for your l aboratory, including traditional TGA and DSC as well as Gas Sorption techniques.We present a small sample of the experiments that can be obta ined with some ofour system (from assessing performance to “abuse test ing” and of course for the development of new material), and encourage you to co ntact us for more information.

Self discharge testA critical measurement of battery performance is it’s ability to hold a charge during ambient conditions, a measurement of it’s shelf life. Calvet Calorimeters (C80 / MS80) and Large Volume Calorimeters (LVC from 1 liter to 90 liters) offer a range of different volumes and sensitivities to assess almost every type of battery, from a single 18650 Li-Ion battery to an entire battery pack or laptop sheet. CalvetCalorimetry gives you unmatched sensitivity and flexibility.

Life cycle teststhe charge/discharge of a battery is a chemical reaction, and by definition can be measured by following the thermal performance over repeated charge/discharge cycles. Using Calvet Calorimetry is a precise and rapid way to determine the true reversibility of a battery cycle and therefore it’s performance over a wide range of operational conditions.

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�After 55 hours the 9 batteries dissipate 24 µW which corresponds to 24/9 = 2.7 µW by battery

�Variation of the mean value of heat flow fromthe battery for each cycle. Initial 5000 cycles (●) and the next 5000 cycles (O) - [1]

C80 Calorimeter

MS80 Calorimeter

Sample Temperature (°C) Guard Heater Temperature (°C)

Time (minutes)450400350300250200150100500

Tem

pera

ture

(°C

)

90

80

70

60

50

40

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� Ethylene carbonate (EC), propylene carbonate (PC), dimethyl carbonate (DMC) and diethyl carbonate (DEC) are the most widely used solvents and LiPF6 is the dominant solute used in practical lithium ion batteries - [2]

Abuse testingSetaram presents the range of Adiabatic Battery Calorimeters from HEL - from small volume for single cells, to entire battery packs; The HEL range can measure the performance of a battery under overcharge, over temperature and even to measure the UL Hot box test in a single calorimeter.

Battery Calorimeter

Thermal stabilityWhen the temperature of a Li-ion battery increases because of abusive conditions (e.g., short circuit, overcharge, heating) self-heating may be initiated. Various exothermic and endothermic reactions involving both the solution and the electrodes can occur inside the battery. The C80 calorimeter is used with the high pressure stainless steel vessel to study the thermal stability of several commonly used organic solvents and electrolytes and to investigate the kinetic process of the related reactions.

C80 Calorimeter

[1] from Y. Saito / Journal of Power Sources 146 (2005) 770–774

[2] from Qingsong Wang and coll., Journal of Loss Prevention in the Process Industries - 19 (2006) 561–569

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