Browse Publications Technical Papers 2020-01-1386

Simplified Approach to Model a HEV/PHEV/Battery Vehicle Cooling System in 1D and validating using DFSS methodology 2020-01-1386

ABSTRACT Improving fuel economy and to satisfy more restrictive emission legislation the Vehicle electrification becomes more important one. Compared to the combustion engine a Hybrid electric vehicles / Plug-in hybrid electric vehicles will use energy from the grid to recharge their high voltage battery and this is converted with much higher efficiency, and less CO2 emission so they will have a significant role in the present transition from conventional to electric vehicles. The addition of new components, such as power electronics, electric machine and high voltage battery, increases the maximum torque available and the energy stored on-board, but increases the weight as well. In addition, although they have really high efficiency, they produce a significant amount of heat that has to be removed. Another thermal management issue in PHEV and BEV is cabin heating, since the engine heat is not available. To guarantee system efficiency and reliability, a completely new thermal management layout has to be designed. The time and cost spent on a real time model of new cooling system will be more which will affect the vehicle development time. So a simplified 1D Modelling approach is defined and followed in this paper by using 1D CAE tool FloMASTER to develop the thermal management (coolant) loop in 1D and simulate for all critical thermal conditions. DFSS methodology is used to validate the design. This paper focuses on modelling, validating the design more ahead of the product development phase.


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