Structural safety analysis and optimization of battery pack for battery electric vehicles
With the increasing demand of users for the range of battery electric vehicles,the weight of the battery cells carried by the battery pack has increased.It is necessary to reduce the weight of the battery pack box in order to reduce the driving energy consumption of electric vehicles.Although traditional steel battery compartments have high stiffness to ensure the safety of battery modules,they are gradually being phased out by automotive companies due to their excessive weight.Lightweight design of battery compartments from both material and structure aspects can effectively solve this problem.With the introduction of integrated die-casting technology,many automotive companies choose to use die-casting technology to produce battery pack box,which can reduce their weight and provide good toughness.Based on finite element analysis software,modal,random vibration,lateral compression,and random fatigue life analysis were conducted on the die cast welded battery pack box of a battery electric vehicle to verify its structural safety.And on the premise of meeting various safety test requirements,the topology optimization method is adopted to carry out lightweight optimization design for the battery pack box.The analysis results show that the battery pack box meets the national safety test standards after optimization,with a weight reduction of 33.4 kg and a lightweight rate of 8.48%.
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维普
