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UM1M820BNA User Instructions
Issue AH, March 4, 2013 Spec No. 1M820BNA (Model M820B)
Spec No. 1M820DNA (Model M820D)
4 Chapter 1. Introduction
This document is property of Emerson Network Power, Energy Systems, North America, Inc. and contains confidential and proprietary information owned by Emerson Network Power, Energy
Systems, North America, Inc. Any copying, use, or disclosure of it without the written permission of Emerson Network Power, Energy Systems, North America, Inc. is strictly prohibited.
1.3.5 Battery Management
General Battery Management
The ACU+ Controller provides the following battery management functions
(except Lithium Ion Battery Configuration).
Battery Charge Temperature Compensation
Battery Equalize Charge
Battery Charge Current Limit
High and Low Battery Temperature Alarms
Battery Thermal Runaway Management (BTRM) Feature
(Reduces Voltage during a High Battery Temperature Condition)
Battery Discharge Tests
Battery Test Logs (maximum twelve [12] logs, maximum eighteen [18] battery strings per log)
Battery LVD (Low Voltage Disconnect)
Battery Capacity Prediction
Battery Block and Battery Midpoint Monitoring
Enhanced Battery Monitoring with SM-BRC
Thermal Runaway Detection/Management
Spec. No. 588820300 Battery Rack System (Lithium Ion Battery Configuration)
When the ACU+ is equipped with the Lithium Ion Battery Configuration for use with Spec. No. 588820300
NetSure™ Battery Rack System, the battery management functions are as follows.
The configuration only provides the battery float charge voltage (equalize charging is not applicable).
The only adjustable battery setting (besides the float voltage level) is the ABCL (Active Battery
Charge Current Limit) Point.
Active Battery Charge Current Limit (ABCL): This feature controls the amount of charge current
supplied to the lithium-ion batteries installed in the power plant to prevent failure of the batteries.
Battery status and alarms sent by the batteries to the ACU+ are displayed in the ACU+ interfaces.
Refer also to the instructions provided by the battery manufacturer for battery management functions
built into the battery itself.
NOTE THAT THE FOLLOWING DESCRIPTIONS ARE FOR THE GENERAL BATTERY
MANAGEMENT FUNCTIONS AND DO NOT APPLY TO THE LITHIUM ION BATTERY
CONFIGURATION.