Operating Instructions

January 8, 2021
BMS-1001-TH BMS
16
INTERNAL BATTERY
A 3300 mAh lithium-ion baery is installed in the BMS to provide reserve power should a fault occur
with external lead-acid baery bank. The internal baery provides power to the external interfaces,
the Bluetooth link, and the current transducer circuitry.
When the BMS is drawing power from the internal baery, the green 'Li-Ion' LED on the front
membrane will be on. The BMS will operate for approximately 11 days from a fully-charged internal
baery and a 30 second broadcast rate.
The baery is accessed by removing the baery cover on the right side of the BMS enclosure.
The red 'Bat Low' LED will turn on when the BMS detects that less than 500 mAh is remaining in the
internal baery. The internal baery may be recharged in the BMS by connecng either the included
AC/DC power adapter (CUI Inc. SWI24-12-N-P6), or via a USB connecon to a PC or dedicated USB
charging device. The approximate charging mes for each method are provided in the table below:
Charging Method
Maximum Charging Current
Charge Time (80% / 100%)
AC/DC Adapter
1.5 A
2.2 hours / 3.2 hours
USB
500 mA
6.6 hours / 7.6 hours
The 'Bat Low' LED will automacally turn o once more than 1000 mAh of capacity has been returned
to the internal baery during a recharge.
The BMS contains protecon circuitry that automacally disables baery charge operaon when the
baery temperature is below 10 °C or above 45 °C. The baery will connue to provide power if charge
operaon is inhibited. Charge operaon will resume once the temperature returns to within the
permissible range.