A method for detecting the remaining mileage of an electric vehicle

A technology for electric vehicles and detection methods, applied in electric vehicles, electrical devices, vehicle components, etc., can solve problems affecting user product experience, journey judgment drop, etc., and achieve the effect of good product experience and reasonable and accurate judgment.
CN107599844BActive Publication Date: 2020-05-08深圳龙电埃瑞斯新能源有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
深圳龙电埃瑞斯新能源有限公司
Publication Date
2020-05-08

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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.
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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...

Claims

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