Pure electric bus dynamic route planning method capable of prolonging service life of power cell

Abstract

The invention relates to a pure electric bus dynamic route planning method capable of prolonging service life of power cells. On the basis of comprehensively considering the pure electric bus operation characteristic, the power cell capacity degradation characteristic and the bus route road condition characteristic and mutual influence of the three characteristics, possible scheduling schemes of pure electric buses at each stage and routes can be acquired through constructing a bigraph model, through calculating total change amount of capacity degradation of all the power cells in different scheduling states, a dynamic planning recursion algorithm is utilized to accomplish optimization of a scheduling period and the scheduling schemes of the full process. The method is advantaged in that service life of the power cells of the electric buses can be prolonged to a maximum degree through the acquired optimal scheduling scheme under the power cell technology level in the prior art, frequency of power cell update in the integral vehicle service life period can be reduced to a maximum degree, and operation cost of the pure electric buses can be effectively reduced.

Description

technical field [0001] The invention belongs to the field of process system engineering, and in particular relates to a dynamic route planning method for a pure electric bus capable of prolonging the service life of a power battery. Background technique [0002] The power battery is the core component of the pure electric bus, which provides the power source for the vehicle. The power battery is one of the main cost elements of an electric bus, and its service life is much shorter than that of a pure electric bus. Due to problems such as short life and high cost, the operating performance of electric buses is largely limited, and the root cause is the capacity decline of power batteries. The decline in the performance of the power battery is not only related to the battery's own charging and discharging electrochemical characteristics and ambient temperature, but also related to the workload and usage of the power battery. For pure electric buses, the capacity attenuation ...

AI Technical Summary

Problems solved by technology

At present, the design of route scheduling schemes for pure electric buses is mostly focused on the improvement of the algorithm for solving the scheduling model, often ignoring the interaction between the characteristics of power battery capacity decline, the operating characteristics of electric vehicles, and the characteristics of working road conditions. Does not take into account the impact of battery capacity decline characteristics on the operating economics of pure electric buses

Images