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Battery charging method

  • US 7,477,041 B2
  • Filed: 05/03/2005
  • Issued: 01/13/2009
  • Est. Priority Date: 05/13/2004
  • Status: Expired due to Fees
First Claim
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1. Method for charging a battery by rectangular current pulses alternately taking a first amplitude during a first period and a second amplitude, different from the first one, during a second period, method comprising determination of a first slope value representative of the variation of the voltage the battery terminals versus time, from successive measurements, of said voltage during each first period, wherein the first amplitude and the duration of the first period being previously determined, the method comprises servo-control of at least one of the current parameters during the subsequent first periods as a function of said first slope value calculated and compared with a first predetermined range at the end of each first period, the first current amplitude and/or the duration of the first period being modified if the first slope value goes outside the first range.

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