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THE TECH

testing By Michael Kent

Named among this year’s most significant innovations by R&D Magazine, the new device is a combination of known theory, new techniques, creative design, and scaled-up functionality.

larger-format cells and battery modules. The IBC 284 surrounds sample cells in a thermostatic bath designed to reach a very stable temperature equilibrium - using a standard 50/50 water-glycol fluid held at an extremely precise temperature setting, up to hundredths of a degree. Named among this year’s most significant innovations by R&D Magazine, the new device is a combination of known theory, new techniques, creative design, and scaled-up functionality. The instrumentation is able to accurately characterize heat output and efficiency of batteries under varying temperature, loads and use conditions, providing precise and critical information previously unavailable for larger-format systems. Temperature has a big impact on the performance, safety, and life of batteries, and thermal management is critical to the operation of Li-ion packs, particularly for EVs. Even today’s most advanced battery management systems have a relatively crude understanding of the operating parameters of the battery pack. NETZSCH’s new system offers a better understanding

IBC 284 - Isothermal Battery Calorimeter

of efficiency and heat generation in large battery cells, modules and packs. Jean-Francois Mauger, the company’s R&D Director, told Charged that the principle behind the IBC 284 has been used for about 10 years, but this is the first commercially available test system that has complete thermal isolation, the ability to test large cells and batteries, and the features needed to test high-energy batteries safely with a level of accuracy and functionality not seen in other calorimeters. Scaling up the precise measurement of heat generation will ultimately help engineers build better vehicles - optimizing thermal management systems, extending battery life, improving safety and reducing costs.

DEC 2013 39

CHARGED Electric Vehicles Magazine - Iss 11 DEC 2013  

CHARGED Electric Vehicles Magazine - Iss 11 DEC 2013

CHARGED Electric Vehicles Magazine - Iss 11 DEC 2013  

CHARGED Electric Vehicles Magazine - Iss 11 DEC 2013