Design of Battery-Supporting Structure for Reducing Deflection of On-Line Electric Vehicles

Key Words: OLEV(온라인전기자동차), Static Analysis(정적해석), Contribution Rate(기여도), Reinforcement(보강재)초록: 이논문은배터리의위치변화에따라발생되는OLEV의처짐개선을위한배터리지지구조물의설계에대한것이다. 배터리의위치변화에따른OLEV의동강성을유한요소해석을통해분석하였고, 동강성이가장높은위치를찾았다. 배터리하중에의한최대처짐을정적해석을통해분석하였다. 발생된처짐을줄이기위해서기본프레임부재별기여도와보강재사용시보강재의위치에따른기여도에대한평가를수행하였고, 기여도가높은기본프레임과보강프레임을사용한개선모델을선정하였다. 개선모델을사용하여정적해석을수행하였고, 기본모델과의결과를비교하였다. 기여도평가를통한개선및보강으로처짐을목표치이하가되도록하였고, 이때개선모델의질량이기본모델보다감소하는것을확인할수있었다.Abstract: This paper presents methods to reduce the deflection of the battery-supporting structure on on-line electricvehicles (OLEVs). First, by testing various battery locations, a location is found that increases the dynamic stiffnessof the OLEV. Second, static analysis is conducted to analyze the maximum deflection caused by the batteryweight. In order to reduce the amount of deflection, the contributions of the battery-supporting structures areanalyzed, and reinforcements are inserted. Then, another static analysis is conducted to compare the results of thebase model and modified model. Consequently, through the static analysis, both the base model and modifiedmodel are similarly improved in terms of deflection, but the modified model is better than the base model atreducing the mass.