12
sustained current above the specified limit.
4. Over-temperature.
Protection can occur during charge and discharge.
5. Under-temperature.
Protection can occur during charge and discharge.
6. Load Qualification.
When the battery is switched on, it will qualify the
load attached to the battery to prevent turning on into a reverse polarity,
short circuit, mixed voltage system, or large capacitive load.
For trigger and recovery values, refer to
Table 2-4
DLP-GC2 Protection Specifications
.
The BMS will reconnect when recovery thresholds are met. If the BMS
disconnects due to low voltage protection, the battery will have to be
manually switched ON. If the system has a constant parasitic draw, a
physical disconnect switch is recommended to reconnect the battery.
There is a 120-second delay for the battery to be turned back on again after
a load qualification fault. This means that if a user attempts to switch the
battery OFF after a load qualification fault, the battery cannot be switched
back ON again until the 120-second delay is over.
NOTE
Charge and discharge have different operating temperature limits
.
NOTE
If the BMS disconnects responding to temperature or current limits, wait for the
temperature or current to reach normal operating limits.
6.3.2 Battery Management System Pre-Charge System
The battery is equipped with a Pre-charge System that will energize external
capacitive loads before turning on the main relay. The maximum input
capacitance for a single battery should not exceed the values published in
Table 2-1.
DLP-GC2 Electrical Specifications
.
6.3.3 Battery Management System Load Qualification
When the battery is switched from the OFF state to the ON state, the battery
BMS will qualify the external load before turning on the main relay. Load
qualification will reject turning on into short circuit, reverse polarity, mixed
voltage systems, or capacitive loads that exceed the batteries limits.
The battery will attempt Load Qualification up to a maximum of 10 times.
After 10 failed attempts at Load Qualification, the battery will switch OFF.
During Load Qualification, or when a load has been disqualified, the at-a-
glance LED will flash red.
6.3.4 Battery Management System Cell Balancing
The battery is equipped with cell balancing circuits that compare all cells
in a battery and balance the cell voltage at the end of the charge. When the
battery is networked with other batteries using the LYNK port, all battery
cells are balanced as an entire system and not as an individual battery.
