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Electric system of electric automobile, control method and vehicle

A technology for power systems and electric vehicles, applied in the fields of control methods, vehicles, and power systems, can solve the problems of power battery energy waste, charging, reducing the service life of DC/DC converters, etc., and achieve the effect of avoiding waste and sufficient power

Inactive Publication Date: 2017-12-15
BORGWARD AUTOMOTIVE CHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the related art, the input bus of the DC / DC converter is connected after the positive contactor (positive relay) and the negative contactor (negative relay) of the power battery pack, and before the positive contactor and the negative contactor are closed, the DC / DC conversion The DC / DC converter cannot charge the low-voltage battery. In addition, after the high-voltage connection of the vehicle, that is, after the positive contactor and the negative contactor are closed, the DC / DC converter is always in the working state, resulting in a waste of power battery energy, and the cooling system needs to be DC / DC converter cooling, in addition, long hours of work will reduce the service life of the DC / DC converter

Method used

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  • Electric system of electric automobile, control method and vehicle
  • Electric system of electric automobile, control method and vehicle
  • Electric system of electric automobile, control method and vehicle

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Embodiment Construction

[0027] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0028] The electric power system, control method and vehicle of the electric vehicle according to the embodiments of the present invention will be described below with reference to the accompanying drawings.

[0029] Before describing the power system, control method and vehicle of the electric vehicle according to the embodiment of the present invention, the electric power system of the electric vehicle is first described. The electric vehicle in the embodiment of the present invention is a pure electric vehicle, such as Figure 4 As sh...

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Abstract

The invention discloses an electric system of an electric automobile, a control method and a vehicle. The electric system comprises a direct current source converter, the input end of the direct current source converter is connected between a power battery and a high voltage contactor through a switch module. The control method comprises the steps that battery state information of a low voltage storage battery is detected; and the switch module is selectively opened and closed according to the battery state information of the low voltage storage battery so as to control starting and stopping of the direct current source converter. The control method can effectively avoid the situation that the direct current source converter works for a long time and waste is generated due to the fact that the low voltage storage battery has no charging demand, and can further ensure that the low voltage storage battery has sufficient electricity under the power-on state of the vehicle.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to an electric power system, a control method and a vehicle of an electric automobile. Background technique [0002] New energy vehicles, such as pure electric vehicles or hybrid vehicles, have the advantages of low energy consumption and low pollution. However, for a pure electric vehicle, since it does not have a generator, a direct current power converter (DC / DC converter) is required to convert high-voltage power into low-voltage power required for the operation of a low-voltage battery. In the related art, the input bus of the DC / DC converter is connected after the positive contactor (positive relay) and the negative contactor (negative relay) of the power battery pack, and before the positive contactor and the negative contactor are closed, the DC / DC conversion The DC / DC converter cannot charge the low-voltage battery. In addition, after the high-voltage connection of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L11/18
CPCB60L53/20B60L58/10B60L58/12B60L2210/12B60L2240/545B60L2240/547B60L2240/549Y02T10/70Y02T10/7072Y02T90/14
Inventor 王亚东
Owner BORGWARD AUTOMOTIVE CHINA CO LTD
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