Features

Highlights

monitoring of all important battery parameters of larger UPS systems in order to ensure operational reliability

simple and fast installation on existing or new UPS systems

very reliable operation

simple and intuitive WEB user interface

automatic logging of data and storage for a period of one year

easy download of all displayed data for further processing in standard format (csv)

easy connectivity to 3rd party SCADA, BMS, … systems via standard Modbus TCP/IP protocol

System functionality

Data	Real-time data	History data	Alarming	Range	Accuracy	Resolution
Low	High
Per Battery (cell)	Voltage	✔	✔	✔	✔	2V battery…… 1.6 .. 2.6 V 12V battery…. 7.5 .. 15.6 V	±0.2 %	0.001 V
Resistance	✔	✔	✔	0.1 .. 50 mΩ	±(1.5 % + 25 μΩ)	0.001 mΩ
Temperature	✔	✔	✔	-20 .. +85 °C	±0.5 %	0.1 °C
SOC	✔	✔	✔	0 .. 100 %	1 %
SOH	✔	✔	✔	0 .. 100 %	1 %
Per string	Voltage	✔	✔	✔	✔	20 .. 800 V	± 0.5 %	0.01 V
Current	✔	✔	✔	✔	-1000 .. 1000 A	± 2 %	0.01 ADC
State	✔	floating charge, equalizing charge, discharge, idle
SOC	✔	✔	✔	0 .. 100 %	1 %
Balance	✔	✔	0 .. 100 %	0.01 %
Ambient temperature	✔	-40 .. +80 °C	± 0.5 °C	0.1 °C
Ambient hmidity	✔	0 .. 100 % RH	±3 %RH	0.1 %RH
Hall sensor state	✔
Per UPS	Voltage	✔	Average of string voltages
Current	✔	Sum of string currents
SOC	✔	Average of string SOC

System limitations

Device	Functionality	Limitations
BM-GW	BTMS IOT Agregator	Combines several BM-GW into one system	Virtually unlimited number of BM-GW
BM-GW	BTMS IOT Gateway	Combines several BM-SS into UPS WEB interface Data collection and logging	Up to 32 battery strings Strings arranged arbitrarily in up to 32 UPS-es
BM-SS / BM-SM	BTMS String master	Combines several BM-CS into string	Up to 120 batteries / string
BM-HS	BTMS Hall sensor	Measures string current	One per string
BM-CS	BTMS Cell sensor	Measures battery	One per battery
BM-MC	BTMS Master controller	Enables the connection of BM-LC, BM-TH and BM-HMI	One per BM-GW
BM-LC	BTMS IO expansion module	Connection of auxiliary sensors (leakage, fire, ..) Connection of auxiliary alarm devices (string disconnection, warning light, siren)	Up to 32 IOs (Up to 4 per BM-MC)
BM-TH	BTMS Temperature and humidity sensor	Ambient temperature and humidity measurement	One per string
BM-HMI	BTMS Human-Machine Interfaces	Local inspection of data from UPS, strings and batteries	One per BM-MC