A chassis for a medium-sized pure electric bus

Abstract

A chassis for a medium-sized pure electric bus, belonging to the technical field of electric vehicle chassis, including a chassis main body load-bearing frame supporting the weight of the vehicle body, and a wheel assembly, a driving mechanism, a steering assembly, and a brake assembly arranged on the chassis main body load-bearing frame And the bumper, the chassis main load-bearing frame is composed of side longitudinal beams and cross beams, and the middle and rear structure of the chassis main body load-bearing frame is designed as a flat warehouse-type frame; the side longitudinal beams are cavity-shaped squares formed by means of side sealing plates Steel, combined with the sealing structure at the front and rear ends of the side stringer to form a hollow cavity structure, the front end is provided with air inlets, the air outlets are evenly distributed on the side sealing plates, and the upper and lower sides of the side stringers are equipped with upper and lower sealing plates to form the air duct of the battery box type heat exchange structure. It has the characteristics of simple structure, large battery capacity, compact layout, good balance and stability, etc. It can also keep the working temperature of the battery box constant and improve the performance and life of the battery box in the chassis.

Description

technical field [0001] The invention belongs to the technical field of electric vehicle chassis, and in particular relates to a chassis for a medium-sized pure electric bus. Background technique [0002] At present, the chassis of electric vehicles is mostly based on the original traditional fuel vehicle chassis structure or slightly improved. Due to the constraints of the engine system and transmission system of traditional fuel vehicles, the manufacturing structure of the chassis is complex, the cost is high, and the carrying capacity, light weight, driving stability, and safety cannot be optimized. But for electric vehicles, one of the most critical issues of electric vehicles is the balance and stability of the vehicle, and in order to balance the vehicle, the biggest constraint is the installation and installation structure of the battery box with the largest weight; because the battery box is the main storage of the electric vehicle The capacity of the battery box is ...

AI Technical Summary

Problems solved by technology

When the battery is charged and discharged, it will generate electrochemical reaction heat and Joule heat generated by the internal resistance of the battery, which will increase the temperature of the battery itself. Taking 25 degrees as the base, the battery's operating temperature will increase by 10 degrees, and the battery's charge and discharge life will be reduced by 50%. , when the upper limit of the optimal operating temperature is exceeded, the performance of the battery will be affected, and in serious cases, there may even be a safety hazard; on the contrary, when the upper limit of the optimal operating temperature is lower than the optimal operating temperature, the voltage of the battery will decrease, and the capacity of the battery will also decrease. Thus affecting the power performance and driving range of electric vehicles

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