What does the battery score mean?

  • The battery score is a comparative number.
  • For customers with one or only a few batteries the score will be of limited use.
  • For customers with a fleet of batteries the score is a very useful tool to quickly compare batteries for replacement and budgeting purposes.
  • Every time cell or battery voltages are recorded during an inspection each cell or battery generates a number based on its’ relationship to the other cells or batteries in the string.
  • During an inspection, the numbers generated by cells or batteries that are less than 0 are added together to create a total score for that inspection.
  • The scores from each inspection are added together to generate a lifetime score for the battery
  • There is no “Threshold” score number that identifies a battery as being spent when a certain number is reached.
  • The score is a number that is used to compare similar batteries operating in a similar environment.
  • A battery with 12 cells will have a lower score than a battery with 18 or 24 cells because less numbers are being generated in batteries with lower numbers of cells. Ex: A 12 cell battery inspected once resulting in a score of -0.04 would be equal to a 24 cell battery inspected once resulting in a score of -0.08. The higher number does not mean the 24 cell battery is worse than the 12 cell battery.
  • The inspection frequency will also affect the score. Ex: Batteries that are inspected twice a year will have lower scores than batteries that are inspected 3 or 4 times per year because the more times cell voltages are recorded the greater the volume of generated numbers will be, adding to the total score.