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System and method for charging a high voltage bus within a hybrid electric vehicle

  • US 20020167223A1
  • Filed: 05/09/2001
  • Published: 11/14/2002
  • Est. Priority Date: 05/09/2001
  • Status: Active Grant
First Claim
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1. ) A system for charging a high voltage bus within a vehicle, said charging system comprising:

  • a source of electrical power;

    a pre-charge contactor which is coupled to said source of electrical power and to said high voltage bus, and which is effective to selectively and operatively connect said high voltage bus to said source of electrical power;

    a main contactor which is coupled to said source of electrical power and to said high voltage bus, and which is effective to selectively and operatively connect said high voltage bus to said source of electrical power;

    a voltage sensor which is effective to measure a voltage of said high voltage bus and to generate signals in response to said measured voltage; and

    a controller which is communicatively coupled to said pre-charge contactor, to said main contactor and to said voltage sensor, said controller being effective to receive said signals and to use said signals to calculate the voltage of said high voltage bus and the change in voltage over time of said high voltage bus, said controller being further effective to utilize said calculated voltage and change in voltage over time within a state machine strategy to close said pre-charge contactor and said main contactor, thereby selectively charging said high voltage bus.

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