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1、 UNIT 15 TEXT B Layout Design of Battery Electric Commercial VehiclesPROFESSIONAL ENGLISH TEXT B Layout Design of Battery Electric Commercial Vehicles本次课学习内容本次课学习目标l掌握Layout Design of Battery Electric Commercial Vehicles的英文专业词汇l训练快速阅读能力，提高阅读速度NEW WORDSgenerousdenrsadj.慷慨的慷慨的;丰富丰富的的;充足的充足的functionalf
2、knladj.实用的实用的;功能功能的的;机能的机能的longitudinalltjudnl adj.纵的纵的;纵向的纵向的;纵观的纵观的;经度的经度的transversetrnzvsadj.横横(向向)的的deckerdek(r)n.层层PHRASES AND EXPRESSIONShigh-voltage part高压部件高压部件electric accessories电器附件电器附件power battery pack动力电池组动力电池组anti-collision requirement防撞要求防撞要求the height of the carriage车厢高度车厢高度axle loa
3、d轴重轴重 Compared with battery electric passenger vehicles,the layout space of battery electric commercial vehicles is more generous.This section will briefly discuss the principles and main contents of the vehicle layout of battery electric commercial vehicles.The vehicle layout of battery electric co
4、mmercial vehicles should meet the requirements of safety,environmental protection and related regulations and international practices,as well as the corresponding functional and performance requirements.The overall balance of the vehicle is the basis of the vehicle layout,the design should put the u
5、se performance in the first place,and then consider the problem in the order of manufacturing,maintenance and appearance,so that the vehicle is easy to use,easy to repair,easy to build and good to look at.Layout Design of Battery Electric Commercial Vehicles The vehicle layout should be coordinated
6、and fit with the shape idea.Battery electric commercial vehicles should focus on the performance of high-voltage parts such as waterproof,dustproof and fireproof,in line with the style and requirements of the shape,and fully consider the assembly requirements of the body and chassis and high-voltage
7、 parts.The high-voltage parts of battery electric commercial vehicles mainly consist of electric drive system,energy storage device,electric accessories,electric control unit,receiving device and other related high-voltage parts,and the safe operation of the vehicle is ensured by the electric contro
8、l unit between each system.Layout Design of Battery Electric Commercial Vehicles Power battery pack and other energy storage devices according to market demand mainly have bottom middle section plus rear section and top plus bottom rear section layout form:bottom should be fully considered energy st
9、orage device heat dissipation,insulation needs and anti-collision requirements,top energy storage device should increase the corresponding protective cover.Electric accessories,electric control unit is mainly concentrated in the vehicle under the last row of seats and the rear high-voltage parts com
10、partment,the electric control unit and the rear surround should ensure a certain safety distance.If there is a receiving device,the receiving device is generally arranged on the roof of the vehicle.Layout Design of Battery Electric Commercial Vehicles The design of low-floor or low-entry battery ele
11、ctric bus should comply with the national standard,the layout of the vehicle high-voltage parts should ensure the width and slope of the channel between the wheel covers,the height of the one step from the ground and the height of the carriage and other overall space design requirements.Among them,t
12、he requirements for the width between the front wheel covers are as follows.Layout Design of Battery Electric Commercial Vehicles The design of low-floor or low-entry battery electric bus should comply with the national standard,the layout of the vehicle high-voltage parts should ensure the width an
13、d slope of the channel between the wheel covers,the height of the one step from the ground and the height of the carriage and other overall space design requirements.Among them,the requirements for the width between the front wheel covers are as follows.For the length of less than or equal to 9m low
14、-floor,low-entry bus,the width of the channel between the front wheel cover is greater than or equal to 550mm.For the length of more than 9m low-floor bus,the width of the channel between the front wheel cover is greater than or equal to 800mm.Layout Design of Battery Electric Commercial Vehicles Fo
15、r the length of more than 9m low-entry bus,the width of the channel between the front wheel cover is greater than or equal to 600mm.The width of the channel between the rear wheel covers is greater than or equal to 500mm;the width of the channel between the wheel covers should be measured in the ran
16、ge from the floor surface to 1800mm above.When the vehicle is in normal driving quality and the body lifting system is not working,the channels longitudinal slope should not exceed 8%and the transverse slope should not exceed 5%.Level-one tread height from the ground should be measured when the body is in normal driving quality and placed on a flat horizontal surface,the specific requirements are as follows.The level-one tread height from the ground of the bus with low floor should be less than
