Active Battery Management System with Voltage Balancing
EquaLink is an Ethernet-based battery management system that monitors the voltage, internal resistance and temperature of each battery in a stationary battery system. Through a patented balancing process, EquaLink actively regulates the float charging current of each battery, ensuring all batteries charge at the optimal voltage.
EquaLink Battery Management System actively manages batteries to increase reliability and extend life, whereas other battery monitoring systems simply monitor batteries as they deteriorate.
EquaLink can monitor current, ambient/room temperature, humidity, hydrogen gas and electrolyte levels. Through available Form C contacts/relays, EquaLink can also monitor electrical equipment such as UPSs, inverters, transfer switches, generators and air conditioning systems.
EquaLink is designed for many battery applications including: lead acid (flooded/wet, VRLA, gel, AGM, etc.) as well as nickel cadmium (NiCd), nickel metal hydride (NiMH) and lithium ion (Li-Ion).
EquaLink is easy to set up and configure.
EquaLink reads individual battery voltages and compares them to the battery system‘s overall voltage. Each EquaLink module controls the amount of float current passing through the battery to regulate the voltage to the optimum value. This constant monitoring and balancing of the individual charging voltages helps guarantee the availability of the battery system at all times. With its proprietary balancing process, EquaLink is able to monitor and actively regulate battery voltage within 0.001 volts of the system’s average float charging voltage.
The service life of a string of batteries is tied to the weakest battery in the system. Often, the service life of such a string is 50-60% of the manufacturer's design life. In the balancing process, each of the batteries within the string is maintained at optimal voltage levels, eliminating the ill-effects of improper charging. The constant care provided for by the Balancing process has been shown to increase the service life of batteries.
Typical battery problems like sulfation, corrosion, gassing, dryout, and thermal runaway are detectable given proper monitoring. Changes in impedance and temperature - which are monitored by EquaLink - tend to indicate the onset of such issues.
By catching increases in impedance and drifting voltages, EquaLink allows the user to detect battery stratification.
By means of an embedded dry contact output, the EquaLink system is capable of tripping the battery breaker in the event of thermal runaway. Automatic battery disconnection is possible, with the optional BM-AUX relay, which trips the battery breaker when user defined parameters are met.
Because it monitors key battery parameters and set thresholds, EquaLink is able to provide advance warning (via audio, video, and network messages) of system events that require attention.
EquaLink monitors system data and environmental parameters (temperature, humidity, hydrogen gas concentration, acid fill level, DC current, dry contacts, etc.). Alerts can be set up, and this information can be accessed via multiple communications systems.
EquaLink is designed to monitor and optimize lead-acid and other battery types in a given battery system.
The balancing process prevents the unintended overcharging of batteries. (By preventing overcharging, EquaLink helps to limit gassing, dry-out, and thermal runaway.)
EquaLink improves the service quality by providing remote monitoring through Internet, VPN, or any network that allows for the downloading of real time data and battery history. It is now possible to test batteries without going to the trouble of disconnecting them from the system. Maintenance and testing take place under real operating conditions and require no downtime.
EquaLink battery modules are capable of taking precise measurements of individual battery voltage, internal resistance and, through an integrated sensor, surface temperature. These measurements are essential to making analyses of the batteries in any given system.
EquaLink transfers data through the communication bus cable system to the EquaLink WebManager.
There are 4 different types of EquaLink modules: 12 Volt, 6 Volt, 4 Volt and 2 Volt. The module can be mounted on the top or side of each battery.
|Voltage||12 V||2 V||6 V||8 V|
|Ah Range||7–600 Ah||7–5000 Ah||7–600 Ah||7–900 Ah|
|9.7–17 V||1.25–3.2 V||4.8–8.0 V||9.7–21.0 V|
|IR Range||0.5–60 mOhm||0.02–6 mOhm||0.5–60 mOhm||0.5–60 mOhm|
|Balancing Power (Current)||0.15 A||0.9 A||0.3 A||0.12 A|
|Current Consumption||15–20 mA (<1 mA sleep mode)||35–40 mA (<1 mA sleep mode)|
|BM-CT400A||DC Current Sensor, 400 Amp|
|BM-CT1000A||DC Current Sensor, 1000 Amp|
|BM-CT1500A||DC Current Sensor, 1500 Amp|
|BM-AUX||Terminal Relay Controller, 4 Digital Inputs and 4 Relay Outputs|
|SBS-H2||Hydrogen Gas Detector (BM-AUX also required)|
|BM-REM-TEMP-9||External Temperature Sensor for Module, 9"L|
|BM-REM-TEMP-35||External Temperature Sensor for Module, 35"L|
|BM-SPLIT||1 x 5 RJ10 Splitter Box|
|BM-ELSENSOR||Electrolyte Level Sensor|
|BM-AMB-TEMP||Ambient Room Temperature Sensor|
EquaLink Order Code
|A||Nominal DC System Voltage||12-
Other XXX Vdc
|B||Number of Individual Batteries to Monitor||XXX||Enter number of batteries (blocks or cells)|
|2 V Cells
4 V Blocks
6 V Blocks
12 V Blocks
|120 Vac/12 Vdc
18 – 72 Vdc
120 – 370 Vdc
*Example part number BM125-60x2V.01 represents: 125V system of sixty (60) 2 Volt cells with a 120 VAC powered WebManager