To research the non-uniform temperature field of power battery for electric vehicle during charge/discharge operation, using the method combining numerical simulation and experiment, based on the characteristic of temperature-rise in battery caused by its internal resistance, coupling thermal effect of anode and cathode, the time-varying heat source model is established to obtain more accurate and dynamic changing distribution of battery temperature field. A lithium-ion power battery for vehicle is taken as a sample, three-dimensional temperature field and temperature rise calculation of battery cell and module are analyzed, and the corresponding experiments are taken. Results show that, the temperature rise of discharging significantly greater than that of charging at the same charge/discharge rate, and the maximum temperature difference of cell increases with the rising of rate; The temperature rise of the battery is a nonlinear process that first increases then becomes constant varying with the time, and is higher with the increase of discharge rates; The temperature field of battery module is not a simple superposition with the temperature field of battery cells, and the thermal consistency of battery module is not as good as that of battery cell under the same charge/discharge rate.
LIU Feifei
,
LAN Fengchong
,
CHEN Jiqing
. Simulation and Experiment on Temperature Field of Lithium-ion Power Battery for Vehicle Based on Characteristic of Dynamic Heat Source[J]. Journal of Mechanical Engineering, 2016
, 52(8)
: 141
-151
.
DOI: 10.3901/JME.2016.08.141
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