In this study, a 40Ah cell with heat-dissipation design is demonstrated with excellent electrochemical, safety and reliability performances. The cell shows a high specific energy of 126Wh/kg and high specific power of 1147W/kg, it can be continuously discharged by 200 Amps current with an acceptable maximum temperature rising to 50 °C. The cell has a special heat-dissipation design inside cell, which enhances heat dissipation from the electrodes to electrical terminals. The function of heat dissipation design in cell is proved by discharging the cell under adiabatic and natural convection environments. It can be more efficient combined with water cooling connections at electrical terminals. Besides, the cell shows excellent safety and reliability performances under overcharge, force discharge, external short-circuit, force discharge, nail penetration, crash, vibration, mechanical shock, temperature cycling and high temperature endurance tests following IEC 62660-2 test methods.
A large-format lithium-ion battery with heat-dissipation design
EVS, Electric Vehicle Symposium, 26 ; 202-208
2012
7 Seiten, 15 Bilder, 2 Tabellen, 2 Quellen
Aufsatz (Konferenz)
Englisch
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