Numerical Calculation and Experimental Research on Thermoelectric Coupling of Power Battery Module Bus-bars
Abstract
Taking the battery module bus-bars of an electric vehicle as the research object, the 3D digital of bus-bar, working boundary conditions, connection relationships between bus-bar and battery cells were extracted. The influence rules of current size, convective heat transfer coefficient and pole welding process on the temperature of bus-bar were studied by numerical method of thermoelectric coupling. In order to ensure the accuracy of the numerical calculation, the dynamic battery pack test system was used to investigate the temperature variance of the specified working condition. The test condition was consistent with the boundary setting in the numerical calculation. The results show that the grid partition, boundary condition, current size, convective heat transfer coefficient and pole welding process have different effects on the temperature rise of the bus-bar. As the error between the numerical calculation and test result occurs in some working conditions, the reason was analyzed in detail. The correlation between the factors and the influence law of the error were also further studied, and then the numerical calculation model was modified. Finally, under the new working conditions, the numerical calculation and experimental measurements of bus-bar were carried out. Through using factor association and the influence rule on the error, the error between numerical calculation and experimental measurement was within 3.7%.
Keywords: power battery, factor association, welding process, temperature rising, thermo-electric coupling
Full Text:
PDFReferences
ZHANG J. XUAN Y M. The optimization of the thin film thermoelectric devices for the hybrid utilization of the photovoltaic thermoelectric hybrid system [J]. Journal of Engineering Thermophysics, 2016, 37(3) ;643 - 647. (In Chinese)
SHEN B, ZHANG X F. Numerical calculation of skin effect of rectangular bus bar in electrical power system of shipL [j]. Journal of Wuhan University of Technology (Transportation Science & Engineering). 2008. 32 ( 3 ) : 537- 539. (In Chinese)
FUJISH1MA N. SUCH A, SUZUKI T, etal. A high density, low on-resistance, trench lateral power MOSFET with a trench bottom source contact [C]// International Symposium on Power Semiconductor Devices and ICS. IEEE* 2002:143 - 146.
BAI J W. ZHANG X D. NIU Z G. et al. Coupling analysis of thermoelectric device generated by LNG cold energy and exhaust gas heat [J]. Journal of Agricultural Mechanization in China. 2016.37( 1): 132-135. (In Chinese)
PIROND1 A, NICOLETTOG, COVA P. et al. Thermomechanical finite element analysis in press-packed IGBT design [J]. Microelectronics Reliability, 2000.40(7): 1163-1172.
AZOUI T, VERDES, SAUVEPLANE J B. et al. 3D electrothermal study for reliability of automotive power vertical MOSFET using COMSOL multiphysics [C]//3rd European COMSOI- Conference. Milan. Italy.2009; 14 ] 16.
CHEN K. l est design and analysis MJ. Beijing: Tsinghua U-niversity Press.2005 :67 ]69. (In Chinese)
VITORATOS E. An analysis of DC conductivity in terms of degradation mechanisms induced by thermal aging in polypyrrole polyaniline blends JJ. Current Applied Physics. 2005. 5 (6) :579 ]582.
YUAN L, YU H. WANG X. et al. The large-size low-stray-parameter planar bus bar for high power IGBT-based inverters [C]// International Conference on Electrical Machines and Systems. IEEE. 2013:1 - 5.
Heating performance of direct and indirect sewage source heat pump system [J]. Journal of Hunan University (Natural Sciences). 2009,36(S2);94 ] 98. (In Chinese)
ZHU Y J. LIU X L. WANG H Y. et al. Solar thermal-electrochemical synthesis of benzoic acid [J]. Chemical Journal of Chinese Universities, 2016.37(2); 322 -327. (In Chinese)
SAUVEPLANE J B. TOUNSI P, SCHEID E, et al. 3 D electrothermal investigations for reliability of ultra low on state resistance power MOSFET [J]. Microelectronics Reliability, 2008,48(8); 1464 - 1467.
Refbacks
- There are currently no refbacks.
