scholarly journals Simulation Methods Development for an EV Battery Pack in Terms of Thermal and Safety Aspects

2021 ◽  
Vol 9 (VII) ◽  
pp. 2921-2929
Author(s):  
Neehar R. Shinganapurkar
Keyword(s):  
Single Cell ◽  
Thermal Shock ◽  
Electric Vehicle ◽  
Thermal Behaviour ◽  
Battery Pack ◽  
Simulation Methods ◽  
Optimum Range ◽  
Safety Aspects ◽  
Methods Development ◽  
Lifepo4 Battery

This paper is the representation of our effort at modelling a LiFePO4 battery pack for an electric vehicle (EV) and further carrying out simulations on it. The process involves creating a single cell and then making a combination of these cells to form a battery pack. The simulations assist us in monitoring the thermal behaviour of the 60Ah battery pack after working for a stipulated amount of time at 1 and 2 C rates. It can be observed that the battery pack may experience thermal shock or thermal runaway leading to the failure of battery pack. Hence it is of paramount importance that we keep a check on the temperature range of the battery. The pack functions best when its temperature is maintained in the range of 288K-308K. This is a challenge in the absence of cooling. Hence, we used air and PCM (RT15 & RT31) as coolants to accomplish the objective of maintaining the temperature of battery pack within the optimum range.

A Methodological Approach for Supporting the Thermal Design of Li-Ion Battery for Customized Electric Vehicles

2014 ◽  
Author(s):  
Daniele Landi ◽  
Paolo Cicconi ◽  
Michele Germani
Keyword(s):  
Thermal Behavior ◽  
Electric Vehicle ◽  
Electric Vehicles ◽  
Combustion Engine ◽  
Thermal Design ◽  
Battery Pack ◽  
Scale Production ◽  
Li Ion Battery ◽  
Suitable Alternative ◽  
Li Ion

An important issue in the mechanical industry is the reduction of the time to market, in order to meet quickly the customer needs. This goal is very important for SMEs that produce small lots of customized products. In the context of greenhouse gas emissions reduction, vehicles powered by electric motors seem to be the most suitable alternative to the traditional internal combustion engine vehicles. The market of customized electric vehicles is a niche market suitable for SMEs. Nowadays, the energy storage system of an electric vehicle powertrain consists of several Li-ion cells arranged in a container called battery pack. Particularly, the battery unit is considered as the most critical component in electric vehicle, because it impacts on performance and life cycle cost. Currently, the design of a battery pack mostly depends on the related market size. A longer design time is expected in the case of a large scale production. While a small customized production requires more agility and velocity in the design process. The proposed research focuses on a design methodology to support the designer in the evaluation of the battery thermal behavior. This work has been applied in the context of a customized small production. As test case, an urban electric light commercial vehicle has been analyzed. The designed battery layout has been evaluated and simulated using virtual prototyping tools. A cooling configuration has been analyzed and then prototyped in a physical vehicle. The virtual thermal behavior of a Li-ion battery has been validated at the test bench. The real operational conditions have been analyzed reproducing several ECE-15 driving cycles and many acceleration runs at different load values. Thermocouples have measured the temperature values during the physical experiments, in order to validate the analytical thermal profile evaluated with the proposed design approach.

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