Apparatus and method for charging and testing batteries

  • US 4,876,495 A
  • Filed: 06/27/1988
  • Issued: 10/24/1989
  • Est. Priority Date: 06/27/1988
  • Status: Expired due to Term
  • ×
    • Pin Icon | RPX Insight
    • Pin
First Claim
Patent Images

1. A method for charging a rechargeable battery which comprises the steps of:

  • (a) measuring the open circuit voltage of said battery and estimating the minimum number of cells possible for the measured open circuit voltage;

    (b) charging said battery at any charge rate and at a substantially constant or constant current until the battery charge voltage equals or is substantially equal to the estimated number of cells of the battery multiplied by a predetermined voltage which is characteristic of the battery;

    (c) charging said battery at a charge rate and at a constant or substantially constant voltage equal to or substantially equal to the battery charge voltage in step (b) until the charge current decreases to a predetermined low value;

    (d) repeating steps (a), (b) and (c) until step (a) indicates a constant or substantially constant value for the estimated number of cells;

    (e) charging said battery at a constant or substantially constant voltage equal to or substantially equal to said constant or substantially constant value of step (d) times a voltage which is characteristic of the battery cells until the current decreases to zero or a predetermined low value; and

    (f) charging the said battery with a predetermined constant or substantially constant current at any voltage for a predetermined period of time.

View all claims
  • 1 Assignment
    ×
    ×

    Thank you for your feedback

    ×
    ×