A method for detecting the remaining mileage of an electric vehicle

Abstract

The invention discloses a method for detecting the remaining mileage of an electric automobile. The method for detecting the remaining mileage of the electric automobile comprises the steps that current state information of a storage battery is obtained, wherein the state information comprises voltage, current, temperature and the aging degree; a current storage battery effective remaining energystate SoEE corresponding to the state information is obtained from a battery model data bank according to the obtained state information; the variation F(t) of the effective remaining energy state inunit time is calculated; the current output power ratio E_rate of the storage battery is calculated according to the obtained state information; the decay rate phi_rate of the current SoEE under an ideal condition is calculated according to the E_rate and the obtained state information; available time tau corresponding to the current remaining electric quantity of the storage battery is calculatedaccording to the current SoEE, F(t) and phi_rate; and driving record information of the electric automobile is read so as to obtain the average driving speed V of the electric automobile, and the remaining driving mileage S of the electric automobile is calculated according to the average driving speed V and the available time tau corresponding to the current remaining electric quantity of the storage battery.

Description

technical field [0001] The invention relates to the field of electric vehicle battery and control technology, and more particularly relates to a method for detecting the remaining mileage of an electric vehicle. Background technique [0002] With the country's strong support and promotion of the new energy industry, and people's awareness of environmental protection is gradually increasing, the dependence on fossil fuels has a tendency to slow down. Correspondingly, the demand for electric energy is increasing day by day, especially in transportation. In the world, major car manufacturers have launched vehicles that use electricity as the driving energy, and new energy vehicles have become a major development momentum. Whether it is a hybrid vehicle with an auxiliary internal combustion engine or a pure electric vehicle, it must be closely complemented with energy storage devices. One of the best energy storage devices today is lithium-based secondary battery products. Howe...

AI Technical Summary

Problems solved by technology

However, the current secondary battery needs a certain amount of time to charge, and charging facilities have not yet been fully popularized. Whether the mileage corresponding to the remaining power of the battery can be accurately displayed is related to whether users can have a good product experience with electric vehicles. , so it is extremely important to accurately evaluate the remaining mileage of electric vehicles

[0003] Since the description of the state of charge of the current secondary battery is mostly the percentage of charge, that is, SoC (State of Charge). The actual mileage of the battery percentage will vary, so only referring to the results of the battery percentage will lead to a gap in the judgment of the journey, which will directly or indirectly affect the user's product experience

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