Decrease the level of the battery for UPS syatem

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    Battery decrease
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Discussion Overview

The discussion revolves around issues related to the decreasing level of batteries in a UPS (Uninterruptible Power Supply) system, specifically focusing on lead-acid batteries. Participants explore potential causes and solutions for the gradual decrease in battery levels over time.

Discussion Character

  • Technical explanation, Debate/contested

Main Points Raised

  • One participant describes a problem with the decreasing battery level in a UPS system and seeks solutions.
  • Another participant suggests that the issue may be related to sulphation in lead-acid flooded batteries and mentions a de-sulphating charge cycle as a potential solution.
  • It is confirmed by a participant that the batteries are indeed lead-acid.
  • One participant rules out the possibility of a cracked plate as a cause for the gradual decrease.
  • Further clarification is provided regarding the charging requirements for lead-acid flooded versus sealed gel cell batteries, emphasizing the importance of specific charging set points.
  • A participant mentions that the system is operating in float mode rather than boost mode.
  • Another participant provides voltage specifications for floating flooded batteries and gel cells, asking for clarification on which type is being used.
  • A participant shares details about having 60 battery cells connected in series, with a total voltage of 132 VDC.
  • One participant expresses that the situation is beyond their experience and withdraws from the discussion.

Areas of Agreement / Disagreement

Participants have not reached a consensus on the exact cause of the battery level decrease, with multiple potential explanations and solutions being discussed. The discussion remains unresolved regarding the specific issue affecting the UPS system.

Contextual Notes

There are limitations in the discussion regarding the assumptions about battery types and charging methods, as well as the lack of detailed information on the specific UPS system in use.

eng_2009
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Hi,

I faced problem with the decrease the level of the batteries for UPS system and from time to time i filled the batteries but still the level decrease after one week...

what is the problem and solution؟

best regards,
 
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If you had to fill them that sounds like lead-acid flooded batteries. Is that correct?

Gradual decrease in that type of battery is usually caused by sulphation. The cure is a special de-sulphating charge cycle, also called equalizing charge cycle. Only some chargers have that feature.

Another possibility is a cracked plate, but that would happen suddenly, not gradually.
 
yes it is lead-acid
 
there is no cracked plate
 
If it is lead acid flooded, then my previous reply about equalization charge is your answer.If it is lead acid sealed gel cell, then it can be easily damaged by charging it to too high a voltage. The UPS charging set point must be specific for gel cells.
 
it is on the float mode not on boost mode
 
You can float a flooded battery at 14.2 volts, but float a gel cell to 13.8 volts max. Which is it?
 
i have 60 battery cells connected in series
each cell 2.2 vdc
total voltage 132 vdc
 
Whoa, that is outside my experience base. I'll bow out of this thread. Hopefully, someone else can help you.
 

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