Numerical Simulation Of The Temperature Field In The Electric Vehicle Battery Compartment

Environment and sustionable development has become a focus of attention andenvironmental pollution as a key source of car development is also facing serious ch-allenges. Limited to the traditional oil resource based on development model is notacceptable. Energy conservation and environmental protection is becoming the newtarget of industry development.Currently, Electric vehicles considered as the "Green Car" is the feasibility of theways to solve the environmental pollution problem. Lithium-ion batteries are widelyappllied in the real life by its advantages,these advantages include: high voltageplatform、 high specific energy、 high specific power、 low self-discharge cycleperformance and environment-friendly etc.The lithium-ion battery will release largeamounts of heat during the operation which reduce the service life of the battery. Sodesigned a cooling facilities in order to guarantee the safety of the battery. Currently,mainly way of cooling way is to supply a cooling fan. The cooling fan suction plays aimportant role in cooling operation. Although this way can reduce battery’s temperature,but it consumed a large capacity and reduced the effective utilization ratio of the battery,doesn’t have the effect of energy conservation and environmental protection. However,if the battery using natural ventilation which is regarded as the most potential way ofcooling can solve this problem, the relative movement of the air around the batteryplays a role in cooling function. Two kinds of air supply way were compared in thispaper. After you determine the best way of air distribution, ventilation for the parallelbattery in parallel ventilation optimize the battery structure on the basis of numericalsimulation combined with the knowledge of fluid dynamics simulation analysis ontemperature field of electric vehicle battery. Then you need determine the best coolingeffect that battery and battery pack behind spacing is20mm batteries and select the battery warehouse space for wedge, Analysis the simulation results of battery based onmaximum temperature、 minimum temperature and average temperature. Concluded:Supply air temperature more effect on the battery temperature field. Analysising the battery’stemperature field after changing the battery supply air temperature and air velocity,Determined when the car is running and the running speed is70km/h,the averagetemperature of the battery is30.04℃. The battery will runs under optimal conditions whenthe supply air temperature of the battery pack is28.5℃. Battery supply air temperatureshould be maintained at less then28.5℃when the vehicle speed is greater than70km/h.This topic has strong pertinence and practicability as the applied basic research, notonly is it for the oretical exploration, but also it provides the theory basis for the furtherdevelopment of the electric car battery for the electric car batteries to be widely used.