Charging method and system for electric vehicle

A charging system and charging method technology, applied in the field of automobile manufacturing, can solve the problems of high use cost, low charging efficiency, long charging time, etc., and achieve the effect of reducing use cost and improving charging efficiency

Active Publication Date: 2012-11-21
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The purpose of the present invention is to at least solve one of the above-mentioned technical defects, especially solve the defects of long charging time and high user cost caused by low charging efficiency in the prior art

Method used

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  • Charging method and system for electric vehicle
  • Charging method and system for electric vehicle
  • Charging method and system for electric vehicle

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Embodiment Construction

[0022] 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.

[0023] The present invention mainly lies in that the DC / DC converter is actively controlled by the battery manager, and when the electric vehicle is parked to charge the power battery pack, it is judged whether the voltage of the rechargeable battery is lower than the low point threshold voltage. If the voltage of the rechargeable battery is lower than the low point threshold voltage, the DC / DC converter is turned on to charge the rechargeable battery, and if the voltage exceeds the low point threshold voltage, the DC / DC converter is turn...

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Abstract

The invention provides charging method and system for an electric vehicle. The charging system comprises a battery pack charger, a power battery pack, a DC / DC converter, a starting battery and a battery manager connected with the DC / DC converter and the power battery pack. In the charging method, the battery manager judges whether the voltage of the starting battery reaches a low-point threshold voltage or not when the power battery pack is charged; the battery manager does not start the DC / DC converter if judging that the voltage of the starting battery reaches the low-point threshold voltage; and the battery manager starts the DC / DC converter to charge the starting battery if judging that the voltage of the starting battery does not reach the low-point threshold voltage.

Description

technical field [0001] The invention relates to the technical field of automobile manufacturing, in particular to an electric vehicle charging method and an electric vehicle charging system. Background technique [0002] With the shortage of energy and the aggravation of environmental pollution, the development of the traditional automobile industry is facing many difficulties. Therefore, the emergence of electric vehicles and hybrid vehicles is favored by the majority of automobile manufacturers and consumers, and has become a hot spot in the development of automobiles. Electric vehicles refer to vehicles powered by electric energy, and generally use high-efficiency rechargeable batteries as the power source. Therefore, the charging system for charging the rechargeable battery has become an indispensable and extremely important part of the electric vehicle. [0003] Such as figure 1 Shown is a schematic structural diagram of an electric vehicle charging system in the prio...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): H01M10/44H02J7/00
CPCY02E60/12Y02E60/10
Inventor郭彬张建华
OwnerBYD CO LTD