Title :
Electrical and thermal characteristics of lithium-ion cells
Author :
Vaidyanathan, Hari ; Rao, Gopalakrishna
Author_Institution :
COMSAT Lab., Clarksburg, MD, USA
Abstract :
The 18650-type lithium-ion cells are characterized by a cell resistance of 130 mΩ capacity of 1.27 Ah at 25°C, and a mid-discharge voltage of 3.6 V. The capacity loss in the 72-hr stand test was 3.39 percent. The heat dissipation properties were determined using a radiative calorimeter. During charge, initial endothermic cooling and subsequent exothermic heating beyond 55-percent state of charge were observed. At C/2 rate of discharge (which is considered medium rate), the heat dissipated was 17 mW/cm3. The heat dissipation profile during discharge is also unique in the presence of a minimum that is different from that observed for Ni-Cd, Ni-MH, and Ni-H 2 cells
Keywords :
calorimetry; cooling; electric resistance; lithium; secondary cells; thermal variables measurement; 130 mohm; 25 C; 3.6 V; 72 h; C/2 rate of discharge; Li; Li-ion cells; capacity loss; electrical characteristics; endothermic cooling; exothermic heating; heat dissipation profile; heat dissipation properties; lithium-ion cells; mid-discharge voltage; radiative calorimeter; thermal characteristics; Anodes; Batteries; Cathodes; Fault location; Heating; Laboratories; Lithium; Temperature; Thermal resistance; Voltage;
Conference_Titel :
Battery Conference on Applications and Advances, 1999. The Fourteenth Annual
Conference_Location :
Long Beach, CA
Print_ISBN :
0-7803-4967-9
DOI :
10.1109/BCAA.1999.795970
