随着电动汽车的发展,电池与车身一体化(Cell to body,CTB)受到越来越多的主机厂青睐;车身与电池包密封是该技术的难题之一,硅胶泡棉作为CTB密封的首选材料,能够通过压缩充分吸收电池包与车身的制造公差,同时具有硅橡胶优异的耐老化性、...随着电动汽车的发展,电池与车身一体化(Cell to body,CTB)受到越来越多的主机厂青睐;车身与电池包密封是该技术的难题之一,硅胶泡棉作为CTB密封的首选材料,能够通过压缩充分吸收电池包与车身的制造公差,同时具有硅橡胶优异的耐老化性、耐腐蚀性以及密封性能;但是市面上流行的CTB密封结构都是相对平整的密封面,对存在凹槽、台阶类型的密封面很少研究。本工作探究了硅胶泡棉在车身密封面存在台阶、凹槽以及中间接触面存在凸台情况下的密封效果,当存在贯穿式的台阶和凹槽时,单独通过硅胶泡棉密封达不到IPX7密封等级;可以通过涂胶浸润凹槽或者台阶直角,再用硅胶泡棉进行密封能满足IPX7密封等级;对于接触面中间存在凸台的情况,硅胶泡棉密封可以满足IPX7密封等级,本实验结果可供电池包与车身密封设计者们提供参考。展开更多
Impact dynamics of multi-rigid-body systems with joint friction is considered. Based on the traditional approximate assumption dealing with impact problem, a general numerical method called the sliding state stepping ...Impact dynamics of multi-rigid-body systems with joint friction is considered. Based on the traditional approximate assumption dealing with impact problem, a general numerical method called the sliding state stepping algorithm is introduced. This method can avoid difficulties in solving differential equations with variable scale and its result can avoid energy inconsistency before and after impact from considering complexily of tangential sliding mode. An example is given to describe details using this algorithm.展开更多
文摘随着电动汽车的发展,电池与车身一体化(Cell to body,CTB)受到越来越多的主机厂青睐;车身与电池包密封是该技术的难题之一,硅胶泡棉作为CTB密封的首选材料,能够通过压缩充分吸收电池包与车身的制造公差,同时具有硅橡胶优异的耐老化性、耐腐蚀性以及密封性能;但是市面上流行的CTB密封结构都是相对平整的密封面,对存在凹槽、台阶类型的密封面很少研究。本工作探究了硅胶泡棉在车身密封面存在台阶、凹槽以及中间接触面存在凸台情况下的密封效果,当存在贯穿式的台阶和凹槽时,单独通过硅胶泡棉密封达不到IPX7密封等级;可以通过涂胶浸润凹槽或者台阶直角,再用硅胶泡棉进行密封能满足IPX7密封等级;对于接触面中间存在凸台的情况,硅胶泡棉密封可以满足IPX7密封等级,本实验结果可供电池包与车身密封设计者们提供参考。
基金the National Natural Science Foundation of China(No.10532050)the Na-tional Science Fund for Distinguished Young Scholars(No.10625211)the Science Development Foundation of Shandong University of Science and Techonogy(No.05g017)
文摘Impact dynamics of multi-rigid-body systems with joint friction is considered. Based on the traditional approximate assumption dealing with impact problem, a general numerical method called the sliding state stepping algorithm is introduced. This method can avoid difficulties in solving differential equations with variable scale and its result can avoid energy inconsistency before and after impact from considering complexily of tangential sliding mode. An example is given to describe details using this algorithm.