Search Results

Thie Paper is the continuation of the works concerning the heat pipe pipe integration within Lithium batteries as thermal control device [ref 8,9]. The previous work showed the high performance and ability of Nickel/F11 grooved heat pipe to limit battery's temperature and reduce the internal thermal gradient When it operates in Zero̲G environment. In the present paper we analyse the performance of this concept during reentry phase of the spacecraft When it is subject to high acceleration. Theoretical study of heat pipe under body forces is performed and results are presented. An experimental assembly has been set up in laboratory to simulate an acceleration field by centrifugal concept. These studies show that heat pipe can be use to cool lithium batteries in the different phases of sapacecraft flight and extension to other dissipating payload is tinkable.

In the present paper, we are going to investigate the influence of the temperature gradient on the electrical capacity of the Lithium/thionyl chloride cells and the dependence of internal heat generation on the temperature level. Moreover, we will show the influence of temperature gradient between couples on the depth of discharge and so how important is to limit this gradient to prevent discrepancy in couple's voltage and inversion phenomenon. First, we present a theoretical study concerning the influence of temperature on the heat generation of lithium/thionyl chloride couple. This study, which is based on the thermoneutral potential, was carried out using calorimetry measurement. We also display the evolution of discharge tension and current with temperature. Secondly, we present a real evolution of these parameters and that for a lithium battery cooled by an aluminium corset put on a coldplate.