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Method for managing the charge state of a traction battery of a hybrid vehicle

A state of charge, traction battery technology, applied in hybrid vehicles, engine-driven traction, electric vehicle charging technology, etc., can solve the problems of recovery of traction battery performance characteristics, vehicle failure to start, etc.

Active Publication Date: 2017-08-01
RENAULT SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The disadvantage of this system is that the vehicle cannot be started until the performance characteristics of the traction battery are restored, in other words until the latter returns to the state of charge and temperature conditions that allow the traction battery to supply the required minimum power level

Method used

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  • Method for managing the charge state of a traction battery of a hybrid vehicle
  • Method for managing the charge state of a traction battery of a hybrid vehicle
  • Method for managing the charge state of a traction battery of a hybrid vehicle

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Embodiment Construction

[0030] The following description is given with reference to a hybrid vehicle equipped with a hybrid powertrain comprising an internal combustion engine and at least one electric motor, wherein the vehicle's " The "take-off" phase is ensured by the electric motor and by electrical power from the traction battery. In order to be able to ensure the capacity of the battery to supply the energy required for traction (in particular, the energy required for starting the vehicle without a previous non-start for charging at a stop), the method of the invention provides a method for detecting Critical usage conditions that facilitate maintaining the battery's state of charge so that dedicated modes for conserving battery power can be activated as required.

[0031] In order to do this, certain variables that are already available in the vehicle are required, including:

[0032] -vehicle speed: v 车辆 (t);

[0033] - Power consumed by the DC / DC converter: P dcdc (t) (The DC / DC converte...

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PUM

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Abstract

The invention relates to a method for managing the charge state (SoC) of a battery including a step of activating a float-charge phase of the battery, in which the battery is intermittently charged with a view to maintaining the charge state thereof above a predetermined target charge-state value (SOC_target), characterized in that said method comprises the following steps: detecting critical conditions of use of the battery likely to prevent the battery charge state from being maintained above the predetermined target charge-state value (SOC_target); and increasing the predetermined target charge-state value (SOC_target) when the critical conditions of use of the battery are detected, such as to anticipate the step of activating the battery float-charge phase.

Description

technical field [0001] The invention relates to a method for managing the state of charge of a battery, said method comprising the step of activating a float phase of said battery, wherein said battery is charged intermittently in order to maintain the state of charge of said battery higher than the predetermined target value. Background technique [0002] The invention is preferably applicable to the traction battery of a hybrid vehicle equipped with a hybrid drivetrain comprising an internal combustion engine and at least one electric machine for simultaneously or independently ensuring the transmission of torque to the drive wheels of the vehicle. The invention is applicable in a non-limiting manner to traction batteries implemented in hybrid drivetrain configurations that require: during a vehicle set-up phase or from a stop and at a low speed of motion of the vehicle" During the "Launch" phase, power to the wheels is supplied solely by the vehicle's traction battery. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L11/18B60W30/18B60L50/13B60L50/16
CPCB60L58/13B60W30/18018B60W30/18027B60W50/0097B60W10/06B60W10/08B60W20/13B60L2240/12B60L2240/547B60L2240/549B60L50/13B60L58/14B60L58/22B60L58/15Y02T10/62Y02T10/70Y02T10/7072Y02T90/14B60L53/24B60L58/16B60W10/26B60L2210/10B60L2240/545B60W2510/244B60L58/12B60W20/00
Inventor T·米罗-帕多瓦尼A-D·乌拉巴
Owner RENAULT SA