【作者】 吴宁；

【导师】 曲延瑞；

【作者基本信息】 北京工业大学 ， 工业设计工程（专业学位）， 2018， 硕士

【摘要】 通过客户反馈及市场调查,得出结论,对于纯电动汽车的续航里程及充电时间要求越来越高,而纯电动汽车关键技术还需要时间及机遇才能突破,因此针对续航里程短充电时间长两个问题,现阶段决定基于现有电动汽车平台开发出一款具有电池快速更换功能的纯电动汽车来解决此两项问题,以满足特殊用户需求。要实现此功能,主要工作量在于车身系统的结构设计,此项目目标为设计一款实现动力电池快速更换、确保电池各项指标达到要求、保证车身的基本性能及结构强度的一款纯电动汽车。同时基于原有车身的性能指标,提出节省空间、方便焊接、适用于小批量生产、轻量化设计等设计概念及目标。基于该设计方案及结构可使其共用多种车型。经过工艺分析及CAE分析等方法,对所设计的结构件进行仿真优化,完善结构形式及工艺思路,得到最优设计。项目技术路线:车身采用分点式安装结构,运用主副定位销控制安装精度。安装结构在车身地板上左右对称,运用《双料片十字叠加结构》方法、理念组成完整的总成;电极集成在地板前横梁上,快速更换时活动接触连接;电池箱体和车身采用错齿机构连接,错齿机构螺接在车身安装支架上,电池箱极柱分布电池箱体两侧,共计14个,每侧7个;实现快换模式时将极柱向上推入错齿机构的卡槽中,再向整车坐标系X正方向推动,此时锁止机构工作,实现锁止。最后根据设计进行样车试制,并对快换机构进行8000次换电可靠性验证测试、主观评价、快换整车电安全试验等相关测试。更多还原

【Abstract】 Through customer feedback and market investigation,reach conclusion,for electric vehicles the short mileage and long charging time are required to be higher and higher.And the key technology of pure electric vehicles still need enough time and opportunity to break through,so for two question of the short mileage and long charging time,decided on the basis of existing electric vehicle platform exploitataion the rapid replacement functions of electric vehicle to solve the two problems,has to meet the special needs of users.To achieve this funcition,the main workload is the structural design of the body system.The goal of the project is to design a pure electric vehicle that can quickly replace the power battery,ensure the battery’s indicators meet the requirements,ensure the basic performance and structurel strength of the body.At the same time,based on the performance index of the original body,the concept and target of space saving,convenient welding,suitable for small batch production and ligheweight design are put forward.Based on the design and structure,variety of vehicles can be shared.Through the prcess analysis and CAE analysis methods,the designed structural parts are simulated and optimized,the structure form and the process ideas are perfected,and the optimal design is obtained.Project technical route: body adopt a split type installation structure,and the installation precision is controlled by using the main and auxiliary positioning pin.The installation structure of symmetry on the body floor.Using method of the <<Double sheet cross superimposed structure>> compare the whole assembly;the electrode integrated in the floor in front of the beam,quick change when the movable contact connection;the battery box and the body use the stagger tooth mechanism connection,stagger tooth mechanism screw on the body bracket,battery box pole distribution on both sides of the box,a total of 14,each side 7;realize the quick change mode time,push the pole upward in to the stagger tooth mechanism card slot,and push forward to the X direction of the whole vehicle coordinate system,at this time the locking mechanism works,locked.Finally,according to the design,the prototype car is trial manufactured,and the quick change mechanism is tested for 8000 times,including reliability test,subjective evaluation,vehicle safety test and so on.更多还原