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Battery Management

  • US 10,224,581 B2
  • Filed: 11/15/2016
  • Issued: 03/05/2019
  • Est. Priority Date: 08/23/2011
  • Status: Active Grant
First Claim
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1. A method for battery management, the method comprising:

  • performing a pretest routine on a first battery string in a battery bank;

    performing a main charge routine on the first battery string;

    performing a non-load testing routine on the first battery string; and

    performing a load testing routine on the first battery string;

    wherein performing the pretest routine comprises;

    measuring a pretest open circuit voltage of each of a plurality of batteries in the first battery string, anduntil the pretest open circuit voltage of each battery in the first battery string is not below a predetermined voltage, performing a preliminary charge routine comprising;

    charging the first battery string, andmeasuring the pretest open circuit voltage of each of the plurality of batteries in the first battery string;

    wherein performing the main charge routine comprises;

    (i) charging the first battery string for a charge time,(ii) isolating the first battery string from charging for a rest time,(iii) repeating stages (i) and (ii) a predetermined number of times, and(iv) measuring a charge open circuit voltage for each of the plurality of batteries in the first battery string,until the charge open circuit voltage of each battery in the first battery string has increased less than a charging voltage differential;

    wherein performing the non-load testing routine comprises;

    measuring a test open circuit voltage for each battery in the first battery string, andrecording, in a database, a first defective indicator that a first battery in the first battery string is defective when the test open circuit voltage for the first battery is below a predetermined voltage level; and

    wherein performing the load testing routine comprises;

    loading each of the plurality of batteries in the first battery string not having the first defective indicator stored in the database with a preset load for a load time,measuring, after the load time, a test load voltage for each of the plurality of batteries loaded with the preset load, andrecording, in the database, a second defective indicator that a second battery in the first battery string is defective when a difference between the test open circuit voltage of the second battery and the test load voltage of the second battery is greater than a load voltage differential.

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