The ADBMS1816 is a multicell battery stack monitor that measures
up to 16 series connected battery cells with a total measurement
error of less than 3 mV after software calibration. The cell measurement
range of 0 V to 4.5 V makes the ADBMS1816 suitable for
most battery chemistries. A programmable gain amplifier (PGA) is
integrated to allow for the monitoring of various currents based
on the target current range in the application. All 16 cells, stack
voltage, and current can be measured in 116.8 μs.
Multiple ADBMS1816 devices can be connected in series, permitting
simultaneous cell monitoring of long, high-voltage battery
strings. Each ADBMS1816 has an isolated, serial peripheral interface
(isoSPI) for high-speed, RF immune, and long-distance communication.
Multiple devices are connected in a daisy chain with one host
processor connection for all devices. This daisy chain can operate
bidirectionally, ensuring communication integrity, even in the event
of a fault along the communication path.
The ADBMS1816 can be powered directly from the battery stack
or from an isolated supply. The ADBMS1816 includes passive balancing
for each cell, with individual pulse-width modulation (PWM)
duty-cycle control for each cell. The ADBMS1816 has a dedicated
ALERT output pin to indicate the fault state. Other features include
an on-board 5 V regulator and a sleep mode, where the supply
current consumption is reduced to 26 μA.
APPLICATIONS
- Backup battery systems and uninterruptible power supplies (UPS)
- Grid energy storage
- Residential energy storage
- E-bikes and E-scooters
- High-power portable equipment
