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System and method for charging a traction battery limiting the current draw of parasitic capacitances

A technology for traction batteries and charging systems, applied in the field of electric technology and automobiles, to achieve the effect of reducing the intensity

Active Publication Date: 2016-05-18
RENAULT SAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] This solution, applicable to built-in chargers for electric or hybrid vehicles, is not isolated from the mains network by means of a galvanic transformer, but has a disadvantage: during the initial positioning of the power conversion of such a charger, the Capacitive components present on the high voltage potential of the , are likely to interact with the supply network together with filtering components such as capacitors for limiting leakage currents
However, this remedy is not always sufficient

Method used

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  • System and method for charging a traction battery limiting the current draw of parasitic capacitances
  • System and method for charging a traction battery limiting the current draw of parasitic capacitances
  • System and method for charging a traction battery limiting the current draw of parasitic capacitances

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Embodiment Construction

[0044] According to a preferred embodiment of the present invention, according to the present invention in figure 1 The charging system SYS shown in is connected to the power supply network RES. The charging system SYS is a built-in charging system for the traction battery of an electric or hybrid vehicle.

[0045] In this preferred embodiment of the invention, the charging system SYS is not isolated from the network RES by a galvanic transformer and the topology described in patent application FR2964506 is used. However, the invention is applicable to other types of chargers, for example chargers galvanically isolated from the network RES, or resonant chargers.

[0046] The charging system SYS makes it possible to recharge the battery Batt of an electric or hybrid vehicle from a three-phase or single-phase power supply network RES. The operation of the charging system SYS when the power supply network RES is three-phase is described in detail in patent FR2964510. The opera...

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Abstract

System and method for charging a traction battery limiting the current draw of parasitic capacitances. The invention relates to a method for charging a traction battery of a vehicle connected to an electrical power supply network (RES), comprising: a control step (E1) for charging parasitic capacitances of a charger of the vehicle without transferring energy to the battery; a step of connecting (E2) a capacitance (Cf) between a phase of the network and the ground of the charger, when a time frame higher than, or equal to, a predetermined time frame expires; and a step (E3) of transferring energy between the network and the battery (Batt), following the step (E2) of the connection of the capacitance (Cf).

Description

technical field [0001] The invention generally relates to the field of electrotechnology and automobiles. More precisely, the invention relates to a system for charging the traction battery of an electric or hybrid vehicle. Background technique [0002] Charging systems for vehicles of this type each comprise one or more current converters which enable the current supplied by the power supply network to which the corresponding vehicle is connected to be adapted to the power of the vehicle. Traction current for charging the battery. Leakage currents generated during this current conversion are transmitted through so-called common-mode parasitic capacitances, each of which connects various elements of the charging system to the vehicle, and then through the ground to which the vehicle is connected via the ground connector. chassis. Depending on the magnitude and frequency of these leakage currents, they may cause the protective circuit breaker to trip and thus prevent or st...

Claims

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Application Information

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IPC IPC(8): H02J7/14B60L11/18
CPCH02M1/36H02J7/14B60L3/00Y02T10/92Y02T10/7072Y02T90/14B60L53/14B60L53/16B60L53/22B60L53/60B60L58/20B60L58/15Y02T10/70Y02T90/12B60L53/20B60Y2200/91B60Y2200/92B60L3/0069Y02T90/16
Inventor C·里波尔M·加蒂O·雷斯
Owner RENAULT SAS
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