摘要
以锂离子动力电池为能量载体的新能源汽车迅猛发展,改变着汽车行业格局,影响着人们的生活。然而新能源汽车安全问题问题频发,关系到人民的财产安全,引起广泛关注。锂离子电池包底部撞击是造成电池包发生热失控进而引发新能源汽车起火爆炸的主要原因。为了提高动力电池包底部防护能力,提出将汽车车身和外饰件中常见的蜂窝板复合材料设计成电池包底护板,并创造性地提出将蜂窝板与电池包箱体底部用结构胶粘接呈整体,设计试验方法,搭建球击试验平台,选择两种不同粘接强度结构胶,采用球击实验研究底护板抗撞击能力和不同结构胶粘接强度对底部球击防护的影响。实验发现蜂窝板复合材料具有良好的吸能性和抗撞击能力,对电池包底部有较好的防护。在蜂窝芯尺寸不变的条件下,蜂窝板的球击防护能力随面材层的厚度增加而变强。采用高强度结构胶的复合底护板在120 J球击变形量仅为6 mm。结构胶粘接强度越强,底护板的球击防护能力越好。
The rapid development of new energy vehicles using lithium-ion power batteries as energy carriers is changing the landscape of the automotive industry and affecting people's lives.However,the frequent occurrence of safety issues related to new energy vehicles is closely related to the safety of people's property,and has increasingly attracted vast attention.The impact of the bottom of the lithium-ion battery pack is the main reason for the thermal runaway of the battery pack,which in turn causes fires and explosions of new energy vehicles.In order to improve the bottom protection ability of the power battery pack,a honeycomb panel composite material commonly used in car bodies and exterior components is proposed to design as a battery pack bottom protection plate,and using structural adhesive to bond the honeycomb panel and the bottom of the battery pack box as a whole is creatively proposed.The experimental method is designed,a ball impact test platform is built,and two different adhesive strength structural adhesives are selected,using ball impact experiments to study the impact resistance of bottom protective panels and the influence of different structural adhesive bonding strengths on bottom ball impact protection.The experiments show that honeycomb panel composite material has good energy absorption and impact resistance,and has good protection for the bottom of the battery pack.Under the condition that the size of the honeycomb core remains unchanged,the ball impact protection ability of the honeycomb panel increases with the thickness of the surface material layer.The composite bottom protection board using high-strength structural adhesive has a deformation of only 6 mm at 120 J ball impact.The stronger the bonding strength of the structural adhesive,the better the ball impact protection ability of the bottom protective plate.
作者
黄红光
王清泉
曾勇
Huang Hongguang;Wang Qingquan;Zeng Yong(GAC Aion New Energy Automobile Co.,Ltd.,Guangzhou 511434,China)
出处
《机电工程技术》
2023年第12期257-259,263,共4页
Mechanical & Electrical Engineering Technology
基金
广州市科技计划项目(202103040001)。
关键词
蜂窝板
结构胶
底部球击防护
锂离子电池
新能源汽车
honeycomb board
structural adhesive
bottom ball impact protection
lithium ion battery
new energy vehicle
