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Method of energy management in a motor vehicle

A technology for energy management and motor vehicles, which is applied in the field of energy management and can solve the problems of small range of electric vehicles

Inactive Publication Date: 2012-11-21
RENAULT SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Current battery-powered electric vehicles have less range than conventional thermal internal combustion vehicles

Method used

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  • Method of energy management in a motor vehicle
  • Method of energy management in a motor vehicle

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Embodiment Construction

[0019] It is therefore an object of the present invention to provide a method by means of which the operation of a supplementary power source for an electric vehicle can be controlled and also has a battery system for supplying the electric traction system of the motor vehicle. The electric traction system of a motor vehicle generally comprises an electric machine which can be operated on the one hand in motor mode and on the other hand in generator mode, and is then driven by the wheels of the motor vehicle.

[0020] According to one principle of the invention, the supplementary power source of the motor vehicle is adapted to be able to operate at two different powers, namely a first low power P1 and a second high power P2 relative to each other.

[0021] In addition, the two kinds of power correspond to the optimal working point of the efficiency of the supplementary power supply. More particularly, by making the supplementary power supply work at the two optimal operating p...

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Abstract

The invention relates to a method of energy management in a motor vehicle comprising an electric traction system supplied by at least one battery, and an electrical energy source which is auxiliary to the battery and which is able to supplement the power provided by the battery in order to supply the electric traction system, said auxiliary source being associated with a fuel reservoir, said method comprising the control of the power level (P_RE) provided by the auxiliary electrical energy source when it is activated, selected exclusively from a first low power level (P1) and a second high power level (P2), according to the sign of the difference calculated between the variation of a reservoir filling state and the variation of a battery charge state, the first and second power levels making it possible to limit the energy losses associated with the conversion of the fuel into electrical energy by the auxiliary electrical energy source.

Description

technical field [0001] The invention relates to a method of energy management in a motor vehicle comprising an electric traction system powered by at least one battery and a supplementary power source capable of supplementing the energy provided by the battery to power the electric traction system and having an associated The power supply supplies fuel to the fuel tank. Background technique [0002] Help reduce CO now 2 Emissions and thus controlling the greenhouse effect have become a major issue for the motor vehicle industry. This has become the background for the rapid growth of electric vehicles. [0003] Current battery-powered electric vehicles have a smaller range than conventional thermal internal combustion vehicles. [0004] As a result, the automotive industry has concentrated on the development of "range-extended" electric vehicles, which have a supplementary battery and a power source capable of supplementing the electrical energy provided by the latter, the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L11/18B60L50/10B60L50/15
CPCY02T90/34Y02T10/7283Y02T10/7044B60L3/0053B60L11/1887Y02T10/705Y02T10/92B60L11/1861B60L15/2045B60L2200/26Y02T10/72B60L58/12B60L58/40Y02T10/64Y02T10/70B60L50/50H02J7/00Y02T90/40
Inventor R·巴尔密
Owner RENAULT SA