Method of assessment of energy consumption by electric bus and parameters of traction accumulatory battery under operational conditions

Abstract

The article proposes a method for determining the real specific consumption of electricity during the operation of an electric bus, and substantiating the capacity of a traction battery (TAB) to ensure the term of its use with a given probability for work on a route of a known length.

The article notes the relevance of the proposed methodology, especially in our time, when economical use of energy resources is necessary.

It is important that, based on the analysis of well-known publications, the authors pay attention to the issue of optimizing the parameters of electric buses, traction batteries, infrastructure and conditions of their use in order to reduce the operating costs of electric vehicles.

The purpose of this study is to determine the real electricity consumption and the required capacity of the traction battery for an electric bus, as well as the planned period of operation of the traction battery.

 From the point of view of substantiation by the authors of the constructive energy capacity of the TAB electric bus for the specified operating conditions, the study determined the consumption of electrical energy during its movement along the route.

As a result of the research, the authors determined the real consumption of electricity and the required capacity of the traction battery for the electric bus.

It is obvious that the obtained result will ensure with a probability of at least 95% the movement on the route during the day and the planned period of operation of the traction battery.

 It is shown that the capacity of the TAB should be sufficient to compensate for energy costs for movement, constant electricity costs for powering auxiliary circuits (heating systems, air conditioning, etc.) and take into account with a probability of 0.95 or 0.99 the required additional capacity, which will ensure that the maximum permissible TAB grade set by its manufacturer.

In the future, further research should be aimed at determining specific values of TAB capacity for other models of electric buses.

 The method can be used to determine the real values of specific electricity consumption and TAB capacity for arbitrary models of electric buses.

Key words: electricity, specific costs, traction battery, capacity, probability of failure-free operation, electric bus.