Planar BAT24SI - Manual (Page 24)

QUICK LINKS
Contents
Index
Regulatory Compliance
Product Information
Warranty
GETTING STARTED
About the Battery System
Battery Components
Identify Connector Ports
Install Fuses
USING THE BATTERY
Charge Battery
Set Up Power Management
MAINTAINING THE BATTERY
Replace Battery
Troubleshooting
APPENDIXES
Battery Disposal
Specifications
19 Planar Battery System BAT24SI
Power consumption efficiency
The charging controller board has four levels of power consumption: charging, running,
standby, and off.
Charging mode The batteries are charged using a constant current/constant voltage
algorithm. A constant current of 3.0 amps max is applied to each battery
until the voltage on the battery reaches 14.4 V. The current exponentially
decreases to maintain 14.4 V on the battery. The cooling fan is on during
this cycle. The +12 VDC regulator circuitry is powered by the power
supply, and the communication system reports the charge status of
the batteries to the host.
Running mode The board consumes power at a rate proportional to the power
consumed by the load during its running mode. The board proves to
be 88% efficient when connected to a 4.5 amp load.
Standby mode The board consumes about 8.5 mA of current when in stand-by mode.
A fully charged and new battery lasts about 3 months in the battery
system before it needs to be charged.
Off mode The board consumes about 350 µA of current when in the stand-by
mode. A fully charged and new battery lasts about 3 months in the
battery system before it needs to be charged. The battery continues
to drain at a rate of 350 µA. Batteries that are not connected to the
controller board have a shelf life of 1 month 97%, 3 months 91%,
6 months 85%, at 68° F.