Method for estimating surplus mileage of pure electric vehicle based on power consumption per kilometer

Abstract

The invention relates to a method for estimating surplus mileage of a pure electric vehicle based on power consumption per kilometer, which comprises the following steps that: 1, an HCU (hybrid vehicle control unit) receives a message sent by a BCU (battery control unit) through a bus, busbar voltage U[bus], busbar current I[bus], and SOC of a battery pack are extracted from the message; 2, the HCU receives a message sent by an ABS (antilock brake system) controller through the bus, and a speed signal v is extracted from the message; 3, an available battery capacity B of the current battery pack being equal to B[Ah]*(SOC-SOC[lower limit]) is obtained according to the current available SOC, the use limitation of the SOC and the total capacity B[Ah] of the battery pack Ah; 4, an available battery energy E[available] of the battery pack being equal to U[bus]* B[available] can be calculated according to the busbar voltage U[bus] and the available battery capacity B of the current battery pack; and 5, surplus mileage S[surplus] being equal to E[available] / W[average] can be calculated according to the power consumption per kilometer W[average] and E[available]. The method automatically takes external influencing factors into consideration, so standardization processed through vast of experiments is unnecessary, and the accuracy is higher.

Description

technical field [0001] The invention belongs to the field of control and instrument display of pure electric vehicles, and in particular relates to an estimation method of remaining mileage. Background technique [0002] Pure electric vehicles have the advantages of energy saving, environmental protection, low noise, etc., but there is still a big gap with fuel vehicles in terms of mileage and load. So far, the key issues restricting the promotion of electric vehicles are still the reliability of batteries and driving ability. [0003] The SOC of a pure electric vehicle battery pack can reflect the remaining driving range of a pure electric vehicle to a certain extent, but it lacks intuitiveness, especially for drivers who do not know battery characteristics, it is more difficult to make it consistent with the remaining driving range. Corresponds to the driving mileage. [0004] Therefore, for pure electric vehicles, it is quite necessary to estimate the remaining mileage a...

AI Technical Summary

Problems solved by technology

[0005] The current method for estimating the remaining mileage of pure electric vehicles is greatly affected by factors such as temperature, driving conditions, and the switch of electrical accessories on the body. It relies on a large number of experiments for calibration, and the accuracy is poor.

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