UPS Battery

[eestudent]

Could someone please help me how to interpret the attached vendor's UPS Battery Performance Table? Thanks:?

 

[__dan]

My reading would be, the table value rates the cell for the rated steady state amperage draw of the load for the time period specified, at which time the cell will be depleted of charge and its operating voltage falls below the voltage low limit setpoint and the battery load is disconnected, by a safety trip to protect the cell from excess discharge damage.

Basically, the cell is rated for 'X' amps at 10 minutes duration and the same cell is rated for 'Y' amps at 1 hour duration. X being > Y.

 

[BostonEE]

My reading would be, the table value rates the cell for the rated steady state amperage draw of the load for the time period specified, at which time the cell will be depleted of charge and its operating voltage falls below the voltage low limit setpoint and the battery load is disconnected, by a safety trip to protect the cell from excess discharge damage.

Basically, the cell is rated for 'X' amps at 10 minutes duration and the same cell is rated for 'Y' amps at 1 hour duration. X being > Y.

I agree with __dan. As I understand it, cell type SBLE 830 can provide 339 amps for 30 minutes at 1.14 V/cell.

 

[GoldDigger]

... at 1.14 V/cell.

Make that "with a final voltage (while still under load) of 1.14V/cell".

 

[mike_kilroy]

Peukart Effect

Peukart Effect

339 AMPs for sure.

Google "Peukart Effect," read up on it, and the chart will make perfect sense.

If you don't like it, buy a UPS with Lithium based batteries instead; they have very small Peukart Effect (ie., ah is ah at any reasonable rate up to 2-3-4x ah).

 

[GoldDigger]

Peukert...

Tapatalk!

 

[mike_kilroy]

thanks for spelling correction! Thankfully google understands us engineers and our misspellings!