General Battery Management. Emerson M820B, M820D

UM1M820BNA

Issue AH, March 4, 2013

1.3.5 Battery Management

User Instructions

Spec No. 1M820BNA (Model M820B)

Spec No. 1M820DNA (Model M820D)

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.

4 Chapter 1. Introduction

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