×

Methods at a battery charger

  • US 20060132096A1
  • Filed: 04/28/2004
  • Published: 06/22/2006
  • Est. Priority Date: 04/30/2003
  • Status: Active Grant
First Claim
Patent Images

1. Method of charging a battery at a battery charger comprising connection means for connection to the terminals of a battery to be charged, means for detecting a voltage over the terminals of a connected battery, and control means for initiating a burst cycle, characterised in that it comprises the steps of:

  • applying a voltage at a connected battery;

    detecting the voltage over the connected battery to sense an increase of voltage over said battery in order to identify whether the internal resistance of the battery has increased compared to a normal state;

    initiating a burst cycle if said internal resistance is identified as increased, wherein a plurality of consecutive voltage bursts are applied to a connected battery to be charged, each burst having a length of at least an order of mS and each burst delivering an amount of charge to the battery and thereby successively lowering the internal resistance of the battery; and

    initiating a charging cycle to charge the connected battery when said burst cycle has been terminated.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×