Dissertation > Excellent graduate degree dissertation topics show

Simulation and Optimization on Heat Dissipation System of MH-Ni Battery Packs for Hybrid Electric Vehicle

Author: MaZhaoQiang
Tutor: QinDaTong
School: Chongqing University
Course: Vehicle Engineering
Keywords: Nickel-hydrogen Battery Heat Dissipation System Temperature Field Computational Fluid Dynamics Simulation Experiment
CLC: TM912
Type: Master's thesis
Year: 2011
Downloads: 299
Quote: 1
Read: Download Dissertation

Abstract


Hybrid electric vehicle (HEV) has been developed rapidly, and it has become an important future direction of the autos. As the main energy storage components, battery affects the performance of HEV directly. With the characteristics of high specific energy, high specific power, long life, fast charging, faint memory effect, less pollution, etc., Nickel-hydrogen (MH-Ni) battery becomes the first choice for HEV.MH-Ni battery will generate a lot of heat during charging and discharging, if the heat is not dissipated promptly, it can lead to overheat of the battery pack, temperature difference among the battery modules and quantity diminution of electricity, thus affects the performance and life of the battery. In order to improve the reliability of battery, not only the battery temperature is required to maintain below a certain critical temperature, but also the temperature difference among the battery modules is required to keep within the reasonable bounds. So, battery pack has a good cooling system or not is particularly important. Using numerical simulation and test validation methods to analyze the temperature distribution of the single MH-Ni battery under given conditions, predicting the thermal performance of battery packs and optimizing the cooling system structure have important practical significance.The main works in this thesis include:①Calculation formula of battery heat was derived according to MH-Ni battery’s electrode reaction and heat theory. A three-dimensional, transient heat dissipation model was built for MH-Ni battery, based on the mass, momentum and energy conservation equations.②The model was applied to simulate the temperature field of the single MH-Ni battery using computational fluid dynamics (CFD) software. A temperature measurement experiment of the single MH-Ni battery during charging and discharging periods was carried out to confirm accuracy of the simulation analysis. It indicates that the simulation results can consist well with the experimental data, and the temperature field model of single MH-Ni battery can reflect the temperature distribution information of the surface of the battery shell.③In the light of domestic research status of battery cooling system, two loading modes of the body heat were applied to carry out the static-state simulation of the MH-Ni battery pack temperature field. One is that the body heat was loaded on the inside of the entire battery shell, and the other one was loaded on the galvanic pile area directly. The influence of the two loading modes on simulation results and the difference between them were analyzed from the perspective of numerical simulation.④An optimization scheme of the MH-Ni battery cooling system was proposed and simulation analysis on both steady and transient state of the optimal model of battery cooling system was carried out. The results showed that the optimal model performed favorable cooling and diminished the maximum temperature of the battery surface as well as the maximum differential temperature at the same place between battery monomers effectively, thus satisfied the application requirements of the MH-Ni battery on hybrid electric vehicles.

Related Dissertations

  1. The Setting Bases of Working Pressure in LNG Systems and Orthogonal Experiment Design of Heat Exchangers,TQ051.5
  2. Study of Interaction between Epoxy Molecules and Carbon Fiber Surface with Molecular Simulation,TB332
  3. Research on Mechanism Analysis and Modeling Simulation of Horizontal Well Tractor,P631.83
  4. Study on Springback of High-Strength Steel Stamping,TG386
  5. Numerical Simulation and Experiment on Hydroforming of Cups with Controllable Radial Pressure,TG386
  6. Research on Technology and Mechanism of Joining Cemented Carbide to Carbon Steel,TG454
  7. The Brake Performance of Hydraulic Retarder and Simualtion Research on Its Application for Aircraft Arrestment,TH137.331
  8. Study on Contact Fatigue Life Based on Grease Variation with Temperature,TH117.22
  9. Satellite Attitude Determination Based on Gyro and Star Sensor,V448.2
  10. Numerical Simulation of Film Cooling in Turbine Cascade with Non-Axisymmetric Endwall Method,V231.3
  11. Research on Orbital Control Method for Space Rendezvous and Docking,V526
  12. High Speed Aerodynamic Convection and Coupled Heat Transfer of Complicated Bodies,V215.4
  13. The Analysis on Characteris of Vibration Source about Vertical Vibration of Surrounding Environment Induced by Rail Transit,U211.3
  14. Single Neuron PID Control for Electro-Hydraulic Servo Unit of Ship Rudder,U666.152
  15. Simulation Analysis on Temperature Stress of RCC Arch Dam and Its Construction Joints Design Research,TV642.2
  16. Analysis and Study of Abutment Stability in Concrete High Arch Dam by Three-Dimensional Nonlinear Finite Element Method,TV642.4
  17. Study on the Heat Transfer Characteristics of Particle Cluster in Circulating Fluidized Bed,TK124
  18. Numerical Simulation of SNCR Process of a 600MW Utility Boiler,TK222
  19. Numerical Simulation of Biomass Direct Reburning,TK16
  20. Numerical Simulation on Pulverized Coal Combustion Process in a 670T/H Tangential Firing Furnace,TK224.11
  21. Numerical Simulation on the Combustion Process in the Furnace of a 1000MW Lignite-Fired USC Boiler,TK224.11

CLC: > Industrial Technology > Electrotechnical > Independent power supply technology (direct power) > Battery
© 2012 www.DissertationTopic.Net  Mobile