چكيده به لاتين
Abstract:
With the lack of fossil fuel resources in the near future, humans will have to use renewable energy sources. Today, battery is used as a renewable energy source. Powering by the battery will increase the battery temperature, which makes the thermal management of the battery inevitable. If the temperature of the batteries is not controlled and exceeds its permissible limit, its life and performance will be affected. Today, a variety of battery thermal management methods have been investigated. These methods can be divided into three general categories: active cooling, passive cooling and hybrid cooling. In the active method, energy is spent on cooling, such as water cooling (pump) and air cooling (Fan) systems. In passive cooling method, cooling is done without energy consumption, such as the use of materials with high thermal storage capacity like phase-change materials, the weak point of this method is the lack of control. Hybrid cooling systems are used to overcome this problem. Hybrid methods are the combination of active and passive cooling systems. In this study, we investigated the batteries arrangment effect, phase change material thickness, and distance of the batteries from each other as a six-pack set of batteries. The batteries are 18650 lithium ion batteries which phase change material is covering them.
In summary, it can be stated that in the hybrid thermal management systems, increasing of the thickness of the phase change material does not improve the cooling performance necessarily. Finally the effect of hybrid battery thermal management on the performance of an electric vehicle was investigated and it was found that as the temperature rises, the electric car batteries will be discharged earlier and consequently, the vehicle mileage will decrease.
Keywords: hybrid cooling, phase change material, Lithium-ion batteries, air cooling thermal management system, electric vehicle mileage
