scholarly journals Thermal performance analysis and optimal control of power lithium cell thermal management system for new energy vehicles

2020 ◽  
Vol 24 (5 Part B) ◽  
pp. 3375-3383
Author(s):  
Xiangyang Zhao
Keyword(s):  
Thermal Management ◽  
Electric Vehicles ◽  
Management System ◽  
Heat Dissipation ◽  
Calculation Model ◽  
Inlet Temperature ◽  
Lithium Cell ◽  
Thermal Management System ◽  
New Energy ◽  
New Energy Vehicles

To improve the service life and performance of lithium cells in new energy electric vehicles, the thermal management system of lithium cells in new energy vehicles is analyzed through simulation experiments in this research. Firstly, the calculation model of set of cells and cooling structure is built, and then a lithium cell management system is designed. On this basis, the cooling structure of lithium cell is optimized. Finally, the simulation results of the calculation model and the simulation results of the heat dissipation performance of the thermal management system in the cooling structure of lithium cell are analyzed, including influence of three factors (coolant flow, inlet temperature of coolant, and discharge multiple) on the heat dissipation of the thermal management system of lithium cell. The results show that the calculation model constructed in this research is feasible. When the optimal structure, coolant flow value, inlet temperature of coolant, and discharge multiple are determined, the thermal management system of lithium cell has a good cooling effect under the optimal parameters. Therefore, the results of this research can provide a good theoretical basis for heat management and heat dispersion technology in new energy electric vehicles.

A Novel SOFC Thermal Management Strategy of SOFC-GT Hybrid System With Anode and Cathode Control Loops

2020 ◽  
Author(s):  
Jinwei Chen ◽  
Yuanfu Li ◽  
Huisheng Zhang ◽  
Zhenhua Lu
Keyword(s):  
Thermal Management ◽  
Temperature Control ◽  
Management System ◽  
Management Strategy ◽  
Inlet Temperature ◽  
Control Performance ◽  
Control Loop ◽  
Control Loops ◽  
Thermal Management System ◽  
Cathode Temperature

Abstract The SOFC performance and lifetime highly depend on the operation condition, especially the SOFC operation temperature. The temperature fluctuation causes thermal stress in electrodes and electrolyte ceramics. On the other hand, it also needs to maintain a sufficiently high temperature to enable the efficient transport of oxygen ions across the electrolyte. Therefore, it is necessary to design an effective SOFC temperature management system to guarantee safe and efficient operation. In this paper, a two-side temperature control method is proposed to avoid the temperature difference between anode and cathode. Therefore, the SOFC thermal management system includes two control loops. The anode inlet temperature and cathode inlet temperature are controlled by blowers adjusting the recirculated flow rate. In addition, the control performance of the proposed SOFC thermal management system is compared with one-side temperature control systems. The results show that both anode control loop and cathode control loop are essential to get a better control performance. The SOFC would operate with less efficiency with only anode temperature control. On the other hand, the safety problem would occur with only cathode temperature control. The temperature gradient would be more than the upper limit at a part load condition. Therefore, the SOFC thermal management strategy with anode and cathode temperature control loops is feasible for the SOFC-GT system.

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