Method and system for estimating future average power consumption and remaining driving range of electric automobile

An average power consumption, electric vehicle technology, applied in electric vehicles, electric traction, electric devices, etc., can solve the problem of unreliable remaining driving range value of electric vehicles

Inactive Publication Date: 2015-08-19
BEIJING BORGWARD AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method considers few factors, and the calculation method used by it will cause the displayed remaining mileage of the electric vehicle to change up and down due to the rapid change of the value of the current i, and the value of the remaining mileage of the electric vehicle finally obtained is not credible

Method used

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  • Method and system for estimating future average power consumption and remaining driving range of electric automobile
  • Method and system for estimating future average power consumption and remaining driving range of electric automobile
  • Method and system for estimating future average power consumption and remaining driving range of electric automobile

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Experimental program
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Effect test

Embodiment 1

[0066] This embodiment provides a method for estimating future average power consumption, such as figure 1 shown, including the following steps:

[0067] S1: Get historical average power consumption.

[0068] S2: Obtain future average power consumption according to the historical average power consumption.

[0069] In the step S1:

[0070] The historical average power consumption and the future average power consumption are distinguished by using the current moment as a time node. What is obtained before the current moment is the historical average power consumption, and what is obtained after the current moment is the future average power consumption. The historical average power consumption may be the historical average power consumption in a past period of time, or the historical average power consumption accumulated since the first operation of the electric vehicle until now. Regardless of the historical average power consumption at any stage, it can be calculated by u...

Embodiment 2

[0091] This embodiment provides a method for estimating the remaining driving range of an electric vehicle, such as figure 2 shown, including the following steps:

[0092] W1: Obtain the remaining power of the electric vehicle.

[0093] W2: Using the method for estimating the future average power consumption of the electric vehicle described in Embodiment 1, the future average power consumption of the electric vehicle is obtained.

[0094] W3: Obtain the remaining mileage of the electric vehicle S = remaining power / future average power consumption.

[0095] Wherein, in the step W1, the remaining power is obtained directly from the BMS (Battery Management System); or the rated voltage U of the power battery is obtained from the BMS 0 , rated capacity C 0 , SOC (State of Charge) value, battery health status SOH (State Of Health), the minimum discharge SOC value allowed by BMS SOC low , use the following formula to obtain the remaining power Q:

[0096] Q=U 0 ×C 0 ×(SOC-S...

Embodiment 3

[0104] This embodiment provides a system for estimating the future average power consumption of electric vehicles, such as image 3 shown, including:

[0105] The historical average power consumption obtaining module is used to obtain the historical average power consumption.

[0106] The future average power consumption acquisition module acquires the future average power consumption according to the historical average power consumption obtained by the historical average power consumption acquisition module.

[0107] In this embodiment, in the historical average power consumption acquisition module, the following methods are used to obtain n historical average power consumptions of the latest n segments of mileage in real time, where n is a natural number:

[0108] Real-time acquisition of n historical average power consumption of the latest n segments of mileage, where the calculation method of the historical average power consumption of each segment of mileage is:

[0109...

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Abstract

The invention provides a method and system for estimating future average power consumption of an electric automobile. Historical average power consumption is calculated and is used for estimating the future average power consumption, so that timely and accurate future average power consumption information is provided for a driver. The invention further provides a method and system for estimating the remaining driving range of the electric automobile. The remaining driving range of the electric automobile is acquired according to acquired remaining capacity and the electric automobile future average power consumption which is obtained through the method and system for estimating the future average power consumption of the electric automobile. Accordingly, the timely and accurate information of the future average power consumption and the remaining driving range can be given to the driver, and the driver can plan routes and choose the charging time conveniently. The acquired remaining driving range of the electric automobile is subjected to saturation processing and one-order inertia filtering processing, so that the circumstance of high-low mutation does not occur to the finally-obtained value of the remaining driving range of the electric automobile, and the remaining driving range under the current situation is truly reflected.

Description

technical field [0001] The invention relates to the technical field of electric vehicle control, in particular to a method and system for estimating the future average power consumption and remaining mileage of an electric vehicle. Background technique [0002] Due to the long mileage of a single refueling of traditional cars, the driver can estimate the distance that can be driven according to the fuel gauge, so it does not show that the current driving mileage has little influence on the driver. For electric vehicles, due to the short mileage of a single charge, the driver needs to get intuitive and accurate information on the remaining mileage in order to plan the driving route, otherwise the driver will always worry about the remaining power to support it to reach the rechargeable Place. [0003] At present, most electric vehicles can only provide the remaining SOC (state of charge) of the current power battery. It is difficult for the driver to determine the remaining ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L3/00B60L3/12B60L11/18
CPCY02T10/70
Inventor 卢山梁汝川
Owner BEIJING BORGWARD AUTOMOBILE CO LTD
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