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Charge/start system and electric vehicle applying the same

  • US 8,525,474 B2
  • Filed: 06/28/2010
  • Issued: 09/03/2013
  • Est. Priority Date: 12/02/2009
  • Status: Active Grant
First Claim
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1. A charge-or-start system applied in an electric vehicle, comprising:

  • a charge-or-start device coupled to an external power source;

    an on-car electric source coupled to the charge-or-start device;

    a battery unit coupled to the charge-or-start device for storing and providing power;

    a first magnetic contactor controlled by the charge-or-start device for conducting or breaking a first current flow between the external power source and the battery unit;

    a second magnetic contactor controlled by the charge-or-start device for conducting or breaking a second current flow between the on-car electric source and the battery unit;

    an insulated gate bipolar transistor (IGBT) module for receiving and conducting the first and the second current flows;

    a filter coupled to the IGBT module for filtering voltage of the first and the second current flows;

    a bi-direction DC-DC converter for bucking/boosting voltage of the first and the second current flows;

    a charge-or-start controller for detecting an output voltage of the IGBT module and an output voltage of the bi-direction DC-DC converter to control the IGBT module and the bi-direction DC-DC converter for controlling paths of the first current flow and the second current flow; and

    a first and a second current sensor for respectively sensing a current flowing between the second magnetic contactor and the IGBT module;

    wherein;

    in charge mode, under control of the charge-or-start device, one of the external power source and the on-car electric source provides power to the battery unit for charging the battery unit through the charge-or-start device;

    in start mode, under control of the charge-or-start device, the battery unit provides power to the on-car electric source through the charge-or-start device, for activating the on-car electric source.

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