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A method and a system for estimating the remaining driving range of a pure electric vehicle

A technology of pure electric vehicles and driving range, which is applied in the field of estimation of remaining driving range of pure electric vehicles, can solve the problem of inaccurate estimation of remaining driving range of vehicles, and achieve the goal of improving estimation accuracy and reducing the error of estimated remaining range Effect

Inactive Publication Date: 2018-12-21
上海精虹新能源科技有限公司
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Problems solved by technology

[0004] In view of the existing problems in the prior art, in order to overcome the deficiencies in the prior art, the present invention provides a method and system for estimating the remaining mileage of a pure electric vehicle, which can effectively solve the problems in the prior art. The problem of inaccurate estimation of the remaining mileage of the vehicle

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  • A method and a system for estimating the remaining driving range of a pure electric vehicle

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[0029] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention.

[0030] Such as figure 1 as shown, figure 1 It is a flow diagram of the method for estimating the remaining mileage of a pure electric vehicle of the present invention, and the specific flow is as follows:

[0031] (1) After the vehicle is powered on, read the initial power consumption per kilometer (energy consumption rate) and the initial average power consumption information, which are stored according to the last vehicle driving conditions, and detect the battery and vehicle status;

[0032] (2) According to the state of charge SOC of the battery, the state of health of the battery SOH and the battery voltage, calculate the current available power of the battery. The specific processing is: calculate th...

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Abstract

The invention discloses a method and a system for estimating the remaining driving range of a pure electric vehicle. The method comprises the following steps: after the whole vehicle is powered on, the initial power consumption per kilometer and the initial average power consumption information are read out, and the battery and the whole vehicle state are simultaneously detected; According to theSOC, SOH and voltage of the battery, the current available power of the battery is calculated. Calculating the initial remaining driving range according to the calculated current available power of the battery and the initial power consumption per kilometer; Updating the information of power consumption per kilometer and average power consumption, calculating the remaining mileage in real time andcalculating the mileage weighting, so as to obtain stable mileage by weighting the difference of mileage, and prevent the mileage from fluctuating greatly; When the power of the whole vehicle is cutoff, the VCU of the whole vehicle stores the power consumption per kilometer and the average power consumption per kilometer traveled by the vehicle. The estimation method of the invention can effectively improve the estimation accuracy of the remaining driving range of the vehicle.

Description

technical field [0001] The invention belongs to the technical field of vehicle control of pure electric vehicles, and in particular relates to a method and system for estimating the remaining mileage of pure electric vehicles. Background technique [0002] Pure electric vehicles are transportation tools powered by power batteries. In recent years, with the support of national policies and the development of related technologies, more and more users choose pure electric vehicles as their means of transportation. However, due to technical bottlenecks such as low battery energy density, the short range and long charging time of pure electric vehicles are still key factors restricting their rapid promotion and development. Therefore, when driving a pure electric vehicle, people still need to pay close attention to information such as the remaining mileage displayed on the instrument, so as to plan the travel route and mileage in advance and reduce the driver's mileage anxiety. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L3/12G07C5/08
CPCB60L3/12G07C5/0808
Inventor 白羽鹤
Owner 上海精虹新能源科技有限公司
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