Chassis for medium-sized pure electric bus

Abstract

The invention provides a chassis for a medium-sized pure electric bus, and belongs to the technical field of electric vehicle chassis. The chassis comprises a chassis main body load bearing frame used for supporting the weight of a vehicle body, a wheel assembly, a driving mechanism, a steering assembly, a brake assembly and a bumper, wherein the wheel assembly, the driving mechanism, the steering assembly, the brake assembly and the bumper are arranged on the chassis main body load bearing frame; the chassis main body load bearing frame comprises side longitudinal beams and transverse beams, and the middle-rear part structure of the chassis main body load bearing frame is designed into a flat bin type frame; the side longitudinal beams are of a hollow cavity structure formed by channel steel or cavity-shaped square steel formed by means of side closure plates combined with a blocking structure at front and rear ends of the side longitudinal beams, an air inlet is formed in the front end of each side longitudinal beam, air outlets are uniformly formed in the side closure plates, and upper and lower bin sealing plates are arranged at upper and lower end faces of each side longitudinal beam, so that an air flue type heat exchange structure of a battery box is formed. The chassis has the characteristics of simple structure, large battery capacity, compact arrangement, good balance stability and the like, and can be used for maintaining constant working temperature of the battery box, improving the using performance of the battery box in the chassis and prolonging the service life of the battery box.

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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