Electric vehicle continuous voyage mile calculation method and device

Abstract

The invention discloses an electric vehicle continuous voyage mile calculation method and device; the calculation method comprises the following steps: 1, obtaining battery information of the electric vehicle and vehicle driving information; 2, counting electricity consumption of the battery when a preset distance is finished by the electric vehicle; 3, accumulating the electricity, consumed by the electric vehicle in driving every preset distance, with the corresponding driving distance; 4, determining whether the accumulated electricity consumption is bigger than or equal to present residual balance of the battery; if not, continue accumulating; if yes, stop accumulating, and the accumulated driving distance is the present continuous voyage mileage of the electric vehicle; the mileage is sent to an instrument through a CAN bus. The method and device is high in calculation precision, and high in calculation efficiency.

Description

technical field [0001] The invention relates to the field of electric vehicles, in particular to a method and device for calculating the cruising range of an electric vehicle. Background technique [0002] At present, the drivers of most electric vehicles estimate the remaining power of the vehicle through the battery meter, and judge the cruising kilometers of the remaining power according to their own driving experience. Due to the limited endurance of electric vehicles, most of them are far inferior to gasoline vehicles and diesel vehicles, and the charging time is long, and there are few charging stations, so drivers will pay more attention to the vehicle's power consumption economy and vehicle power consumption. , but due to the non-linear relationship between the power and voltage of the electric vehicle battery, it is difficult to directly calculate the cruising range from the remaining power. [0003] In the prior art, the cruising range information is mainly displa...

AI Technical Summary

Problems solved by technology

[0004] 1. Since the change of average power consumption will have a direct impact on the mileage, the average power consumption of the last 30 kilometers is usually used in the calculation, so that in some specific scenarios, the change in the average power consumption will cause the battery life to change. There is a large jump in the mileage, which deviates greatly from the actual cruising range and is unrealistic (in reality, the cruising range decreases by kilometer, and there will be no jump);

[0005] 2. In the existing remaining mileage calculation method, two division calculations (floating-point calculations) have been carried out, and the amount of calculation is very large. The cruising mileage calculation unit in the car is mainly an 8-bit or 16-bit single-chip microcomputer. The computing power is very limited, which affects the computing efficiency

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