Method and system for predicting real-time mileage of pure electric vehicles

Abstract

The invention discloses a prediction method and system of a real-time driving mileage of pure electric vehicles. The method comprises the following steps that: (1) a vehicle controller reads signals of a battery management system and a vehicle speed signals; (2) the discharge energy used by a high-voltage storage battery system is calculated according to the signals of the battery management system; (3) the total power consumption of current key circulation is calculated according to the current battery voltage and the current battery current of the battery management system; (4) the total mileage of current circulation is calculated according to real-time vehicle speed signals; (5) the driving mileage of the pure electric vehicle is corrected according to the total power consumption of the current total key circulation and the total mileage of the current circulation. The driving mileage of the vehicle is corrected more reasonably according to the discharge capacity of the current key circulation and the mileage, so that the calculation precision of the driving mileage of the vehicle is improved, and a more accurate control basis is provided for the reasonable use of the pure electric vehicles and the prolonging of service life and the like. The predication method and system can be widely applied to the predication of the driving mileage of the pure electric vehicles.

Description

technical field [0001] The invention relates to the technical field of control of pure electric vehicles, in particular to a method for determining the real-time mileage of pure electric vehicles. Background technique [0002] Pure electric vehicles use high-voltage power batteries as the only energy source for vehicles, and rely on high-voltage motors to drive vehicles or recover braking energy. They have the characteristics of zero emissions and low noise. [0003] The mileage of a vehicle is the total mileage that the vehicle can travel continuously under the condition of maximum power energy reserve. The real-time mileage refers to the total mileage that can be driven continuously under the condition of real-time energy reserve. The real-time mileage of the vehicle is an important content in the instrument display of the vehicle. It should accurately reflect the mileage of the vehicle under the current working conditions, so as to remind the driver to replenish energy i...

AI Technical Summary

Problems solved by technology

[0004] However, the above method does not fully consider the instantaneous power consumption of the battery, and does not make reasonable corrections; especially for the characteristics of the currently used high-voltage batteries, when the discharge rate of the high-voltage battery is high, the available power of the battery will be lower than that of the low-rate discharge. available battery charge

Therefore, the current calculation method of pure electric vehicle mileage only reflects the driving mileage under ideal working conditions, and there is a large error with the actual driving mileage under actual working conditions, which cannot provide accurate information for drivers.

In the current situation that there are few charging stations for electric vehicles, it is impossible to charge at any time. Misjudgment of the driving range will bring troubles to the driver without electricity halfway, and also affect the service life of the vehicle.

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