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Method for timely processing of signals quantifying the state of charge of a motor vehicle battery

A state of charge, motor vehicle technology, applied to battery circuit devices, measuring electricity, electric vehicles, etc., can solve problems such as difficult and unreliable information for users

Active Publication Date: 2017-02-01
RENAULT SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The disadvantage of these rapid changes in state of charge is that it is difficult for the user to understand and may give the user the impression of having unreliable information

Method used

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  • Method for timely processing of signals quantifying the state of charge of a motor vehicle battery
  • Method for timely processing of signals quantifying the state of charge of a motor vehicle battery
  • Method for timely processing of signals quantifying the state of charge of a motor vehicle battery

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Embodiment Construction

[0057] figure 1 Various steps of the method according to the invention are shown schematically.

[0058] The method is implemented, for example, by a computing and electronic control unit of the vehicle, which receives signals from various vehicle engine sensors. The control unit is programmed to implement different methods, including the method according to the invention.

[0059] The method involves processing as a function of time a raw signal SOC_Raw(t) quantifying the state of charge of a battery of a motor vehicle, in order to obtain a filtered signal SOC_Filter(t) as a function of time whose variation the user maintains to understand in an intuitive way .

[0060] The initial signal SOC_Raw(t) is obtained eg by using an algorithm that estimates the state of charge of the battery, which is known per se.

[0061] This algorithm makes it possible to estimate the state of charge of the battery, for example from the value of the discharge current of the battery measured a...

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Abstract

The invention relates to a method for processing an initial signal (SOC_Brut(t)) quantifying the state of charge of an electric battery of a motor vehicle in time in order to obtain a time-based filtered signal (SOC_Filtre(t)), in which the following steps are performed at each moment t: a) determining a difference (DIFF(t)) between the value (SOC_Brut(t)) of said initial signal at the moment t and the value (SOC_Filtre(t-1)) of the filtered signal determined at the preceding moment t-1; b) determining a theoretical variation (Variat_TH(t)) of the state of charge of the battery at the moment t according to the electric power supplied or recovered by the battery at the moment t; c) determining, according to the difference (DIFF(t)) determined in step a) and the theoretical variation (Variat_TH(t)) determined in step b), the value of the filtered signal (SOC_Filtre(t)) at the moment t.

Description

technical field [0001] The invention relates to a method for processing an initial signal quantifying the state of charge of a battery of a motor vehicle as a function of time to obtain a filtered signal as a function of time. [0002] The invention is particularly applicable to any vehicle having an electric motor powered by a battery. Background technique [0003] In an electric vehicle, the amount of energy stored in the traction battery is determined in real time while driving. [0004] The amount of energy stored in a battery is usually expressed as a percentage of its maximum storage capacity. [0005] The term "state of charge" of a battery will be used to express the amount of stored energy as a percentage of maximum storage capacity. [0006] Thus, the state of charge of a fully charged battery has a value of 100%, and an empty battery has a value of 0%. [0007] This information is communicated to the driver at each moment via a screen on the vehicle's dashboard...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/36B60L11/18
CPCG01R31/367H02J7/04H02J7/00716
Inventor M·马尔西利娅S·克莱古特
Owner RENAULT SA