Version: 2020-09-04
191
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TEL +49(40)22692910 - EMAIL generex@generex.de - WEB www.generex.de (This and all other product datasheets are available for download.)
Threshold definitions
For this configuration step, navigate to the following menu:
The BACS thresholds define fixed points within the charge / discharge cycle where intervention becomes necessary before an acute
incident arises.
The following values are monitored during the discharge / charge cycles:
Battery voltage
The voltage measured by a battery during the charge / discharge cycle indicates whether the battery will soon become overcharged or
will run into a deep discharge. These values may differ depending of the specifications made by the battery manufacturer. In case of the
measurements exceed or drop below the pre-defined values, a warning will be issued.
Please note, the limits specified by the BACS are correct for most batteries and should only be changed after consultation with the
battery manufacturer.
Battery temperature
The temperature of a battery will influence the performance and the life of a battery. A battery will heat up during the charge and
discharge cycle. However, if the temperature exceeds the limits, it may lead into different defects. How and when these defects will
manifest, depends on the type of battery.
Internal resistance of the battery
Depending on the design of the battery, the internal resistance changes, in some cases it increases abruptly, in other cases it drops
abruptly. In case of using new batteries, measured values of the internal resistance should always be equal at all batteries. Thereby the
measured value is determined by its carrier material - the type of battery. This means, a deviation of the internal resistance to other
batteries indicates a battery fault.
Why not using voltage measurements?
The voltage is not suited to be used as an indicator for battery failure, because measured voltages of the battery reacts and follows
during a trickle charge the voltage behavior of the charger. With internal resistance (and the indicator for equalizing) measured values
will indicate a problem of the batteries’ chemistry and thus allow to warn in case future problems can be assumed.
The internal resistance of a battery indicates upcoming problems and should be used for long term monitoring.
For warning level, we recommend 25% deviation from the average value of all batteries.
For alarm levels, we recommend 50 % deviation from the average value of all batteries.
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