
Calorimeters for thermal propagation research on Lithium-ion batteries
Lithium-ion batteries have the advantages of high energy density, fast charge/discharge ability, no memory effect and low self-discharge. The last step is to prevent the propagation of the thermal runaway from one cell to the neighbouring cells. A heater mat is attached to cell 2 and the heat shield material to be tested is installed between cells 3 and 4 and below the lid (s. 1). The improved protection material DEFENSOR MULTIFLEX® from HKO Group, which was tested in this example, is able to delay the thermal propagation to cell 4 by 9 minutes. The temperature on the top of the lid, the so-called cold side temperature, stayed below 80 °C during the whole test, whereas temperatures of up to 850 °C were reached inside the battery box. There is still a lot of discussion and ongoing research in this article is published under Creative Commons license CC-BY, is published by the Calorimeter Center.
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