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Heavy duty battery system tester and method

  • US 7,990,155 B2
  • Filed: 05/28/2008
  • Issued: 08/02/2011
  • Est. Priority Date: 04/28/2005
  • Status: Active Grant
First Claim
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1. A method of testing a bank of batteries of a vehicle, comprising:

  • measuring a voltage of a bank of batteries, each battery of the bank of batteries comprising a plurality of cells;

    comparing said measured voltage to a threshold voltage;

    applying a load to the bank of batteries if said measured voltage is greater than said threshold voltage;

    measuring the voltage of the bank of batteries while the load is being applied;

    comparing the change in voltage of the battery bank to a voltage drop maximum threshold, wherein the voltage drop maximum threshold is based on the number and temperature of batteries in the bank of batteries; and

    determining whether said bank of batteries passes the test based on said change in voltage,wherein if it is determined that the bank of batteries fails the test, said method further comprises;

    testing each individual battery; and

    charging said batteries until it is determined that said battery bank passes.

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