EG4 ELECTRONICS EG4-LL 48V 100AH Lithium Iron Phosphate Battery User Manual

: June 13, 2024
: EG4 ELECTRONICS

Table of Contents

EG4-LL 48V 100AH Lithium Iron Phosphate Battery
Product Information
Abbreviations
Safety
Battery Overview
Installation
Battery Operation
Product Usage Instructions
Installation
Battery Operation
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

EG4-LL 48V 100AH Lithium Iron Phosphate Battery

Product Information

The product is a battery system that provides power for various
applications. It consists of multiple components that work together
to store and deliver electrical energy. The system includes a
battery, an LCD screen for monitoring and control, and various
safety features.

Abbreviations

This section provides a list of abbreviations used throughout
the user manual for easy reference.

Safety

The safety section provides important guidelines and precautions
to ensure safe usage of the battery system. It covers topics such
as handling, storage, and installation procedures to minimize
risks.

Battery Overview

This section gives an overview of the battery system, including
its connections and components. It includes a diagram of the
battery and information about the emergency stop feature.

Installation

The installation section provides detailed instructions on how
to install the battery system. It covers topics such as packaging
list, placement considerations, storage requirements, and
installation procedures.

Battery Operation

The battery operation section explains the functions and
features of the LCD screen. It includes descriptions of buttons,
instructions for waking up the screen, and information about cell
and temperature monitoring.

Product Usage Instructions

Installation

To install the battery system, follow these steps:

Refer to the packaging list to ensure all components are
present.
Select a suitable location for installation, considering
factors such as space availability, ventilation, and accessibility
for maintenance.
Ensure proper storage conditions for the battery system,
following the guidelines provided.
Follow the requirements for installation, which may include
securing the battery, connecting cables, and integrating with other
systems if applicable.
If multiple batteries need to be connected in parallel, refer
to section 5.3.1 for detailed instructions.

Battery Operation

To operate the battery system using the LCD screen, follow these
instructions:

Familiarize yourself with the button descriptions provided in
section 6.1.1.
To wake up the LCD screen, follow the steps outlined in section
6.1.2.
Access cell information on the LCD screen by following the
instructions in section 6.1.3.
Monitor temperature information through the LCD screen using
the guidelines in section 6.1.4.

USER MANUAL EG4®-LL 48V 100AH Rack-Mounted Battery
© 2023 EG4 Electronics, LLC. All rights reserved. Version 2.1.0 | Information subject to change without notice.

Contents

Contents ……………………………………………………………………………………………………………………………………………………… 1

1 Abbreviations ……………………………………………………………………………………………………………………………………….. 3

2 Safety…………………………………………………………………………………………………………………………………………………… 4

2.1 Safety Instruction …………………………………………………………………………………………………………………………… 4 2.2 Important Safety Notifications …………………………………………………………………………………………………………. 4 3 Brief Introduction ………………………………………………………………………………………………………………………………….. 5 3.1 Product Description ………………………………………………………………………………………………………………………… 5

4 Battery Overview…………………………………………………………………………………………………………………………………… 6

4.1 System Connections ……………………………………………………………………………………………………………………….. 6

4.2 Overview of System Components……………………………………………………………………………………………………… 6 4.2.1 Battery Diagram ……………………………………………………………………………………………………………………… 7 4.2.2 Emergency Stop (RSD, ESS Disconnect) ……………………………………………………………………………………… 8

5 Installation ……………………………………………………………………………………………………………………………………………. 9

5.1 Packaging List and Placement…………………………………………………………………………………………………………… 9 5.2 Location Selection and Installation ……………………………………………………………………………………………………. 9
5.2.1 Storage ………………………………………………………………………………………………………………………………….. 9

5.2.2 Requirements for Installation………………………………………………………………………………………………….. 10

5.2.3 General Installation ……………………………………………………………………………………………………………….. 11 5.2.4 Installation in EG4® Battery Rack……………………………………………………………………………………………… 12 5.3 Battery Communications ……………………………………………………………………………………………………………….. 13

5.3.1 Connecting multiple batteries in parallel ………………………………………………………………………………….. 13

5.3.2 Communication Cable Pinout and DIP Switch ID Tables………………………………………………………………. 13 5.4 Installing with Different EG4 ® Battery Models …………………………………………………………………………………. 15

6 Battery Operation………………………………………………………………………………………………………………………………… 16

6.1 LCD Screen…………………………………………………………………………………………………………………………………… 16

6.1.1 6.1.2 6.1.3

Button description…………………………………………………………………………………………………………………. 16 Waking up the LCD screen………………………………………………………………………………………………………. 16 Cell Information…………………………………………………………………………………………………………………….. 17

6.1.4 Temperature Information……………………………………………………………………………………………………….. 17

6.2 Communication Protocol Selection …………………………………………………………………………………………………. 17 6.2.1 Protocol Change/Selection Procedure ……………………………………………………………………………………… 17
6.3 BMS Tools Installation and Interfacing …………………………………………………………………………………………….. 18

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6.3.1 Downloading and Installing BMS Tools……………………………………………………………………………………… 18 6.3.2 Interfacing with BMS Tools …………………………………………………………………………………………………….. 21 6.3.3 Interface menu definition……………………………………………………………………………………………………….. 22 6.4 Battery Charging …………………………………………………………………………………………………………………………… 23 6.4.1 Charge cycle …………………………………………………………………………………………………………………………. 23 7 Troubleshooting, Maintenance & Disposal ……………………………………………………………………………………………… 24 7.1 Introduction to the BMS ………………………………………………………………………………………………………………… 24 7.1.1 BMS Protection……………………………………………………………………………………………………………………… 24 7.2 Troubleshooting …………………………………………………………………………………………………………………………… 25 7.2.1 Alarm Description and Troubleshooting……………………………………………………………………………………. 25 7.3 Battery End of Life ………………………………………………………………………………………………………………………… 26 8 EG4® Warranty ……………………………………………………………………………………………………………………………………. 27 8.1 Warranty Exclusions ……………………………………………………………………………………………………………………… 27 9 Technical Specifications………………………………………………………………………………………………………………………… 28 9.1 Technical Specifications Table ………………………………………………………………………………………………………… 28 9.2 Battery Performance Curves…………………………………………………………………………………………………………… 30
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1 Abbreviations
· A — Amp(s) · Ah — Amp hours · AC — Alternating Current · AHJ — Authority Having Jurisdiction · ANSI — American National Standards Institute · AWG — American Wire Gauge · BMS — Battery Management System · DC — Direct Current · DIP — Dual In-line Package · EG — Equipment Ground · EGC Equipment Grounding Conductor · ESS — Energy Storage System · In. lbs. — Inch Pounds · kW — Kilowatt · kWh — Kilowatt-hour · LFP — Lithium Iron Phosphate · mm — Millimeter(s) · mV — Millivolt(s) · NC — Normally Closed · NEC — National Electrical Code · NFPA — National Fire Prevention Association · Nm — Newton meters · NO — Normally Open · PC — Personal Computer · PCB Printed Circuit Board · PPE — Personal Protective Equipment · PV — Photovoltaic · RSD — Rapid Shut Down · SOC — State of Charge · V — Volt(s)
3

2 Safety
2.1 Safety Instruction
Before any work begins, carefully read all safety instructions, and always observe them when working on or with the battery. The installation must follow all applicable national or local standards and regulations. Consult with your AHJ to obtain the proper permits and permissions before installation.
Incorrect installation may cause:
· injury or death to the installer, operator or third party · damage to the battery or other attached equipment
2.2 Important Safety Notifications
There are various safety concerns that must be carefully observed before, during, and after the installation, as well as during future operation and maintenance. The following are important safety notifications for the installer and any end users of this product under normal operating conditions.
Dangers of High Voltages and Large Current
1. Do not disassemble the battery. Contact your distributor for any issues in need of repair for proper handling instructions. Incorrect servicing or re- assembly may result in a risk of electric shock or fire and voiding the warranty.
2. Never short-circuit DC inputs. Short-circuiting your battery may result in a risk of electric shock or fire and can lead to severe injury or death and/or permanent damage to the unit and/or any connected equipment.
3. Use caution when working with metal tools on or around batteries and systems. Risk of electrical arcs and/or short circuiting of equipment can lead to severe injury or death and equipment damage.
4. Beware of high battery current. Please ensure that the battery module breakers and/or on/off switches are in the “open” or “off” position before installing or working on the battery. Use a voltmeter to confirm there is no voltage present to avoid electric shock.
5. Do not make any connections or disconnections to the system while the batteries are operating. Damage to system components or risk of electrical shock may occur if working with energized batteries.
6. Make sure the battery and rack are properly grounded.
7. An installer should make sure to be well protected by reasonable and professional insulative equipment [e.g., personal protective equipment (PPE)].
8. Before installing, operating, or maintaining the system, it is important to inspect all existing wiring to ensure it meets the appropriate specifications and conditions for use.
9. Ensure that the battery and system component connections are secure and proper to prevent damage or injuries caused by improper installation.
4

Warning
1. All work on this product must be carried out by qualified personnel. To reduce the risk of electric shock, do not perform any servicing other than that specified in the operating instructions unless you are qualified to do so.
2. Read all instructions before commencing installation. For electrical work, follow all local and national wiring standards, regulations, and these installation instructions. All wiring should be in accordance with the National Electrical Code (NEC), ANSI/NFPA 70.
3. The battery and system can connect with the utility grid only if the utility provider permits. Consult with your local AHJ before installing this product for any additional regulations and requirements for your area.
4. All warning labels and nameplates on this battery should be clearly visible and must not be removed or covered.
5. The installer should consider the safety of future users when choosing the battery’s correct position and location as specified in this manual.
6. Please keep children away from touching or misusing the battery and relevant systems. 7. Battery is designed to stop charging at 32°F. If charging current is observed when the internal
battery temperature is below 32°F, disconnect battery immediately and consult manufacturer.
DISCLAIMER
EG4® reserves the right to make changes to the material herein at any time without notice. You may refer to the EG4® website at www.eg4electronics.com for the most updated version of our manual.
3 Brief Introduction
3.1 Product Description
The EG4® 48V-LL rack-mounted lithium batteries are ideal for low-voltage energy storage system applications. These batteries use lithium iron phosphate cells with the highest safety performance and a battery management system (BMS) that can monitor and collect voltage, current, and temperature of each cell within the module in real time. The BMS also contains a passive balance function and an advanced battery control method, both of which can help improve the performance of the battery pack. For enhanced security, the battery has two onboard fire-extinguishing modules.
5

4 Battery Overview
4.1 System Connections
Below is an example system connection diagram with an EG4 charge controller and EG4 inverter:
Note: During single-battery operation, the battery terminals can directly connect to the equipment.
4.2 Overview of System Components
The battery module is made up of sixteen “AAA” grade cells, a BMS, a housing, a breaker, and wire. It can be installed in a standard 19-inch cabinet and communicates with external devices via CAN/RS485 as well as with other EG4® batteries via RS485. The modules can be connected in parallel to meet expansion requirements. Inter-battery communications support a maximum of 64 modules for the 6 DIP switch model or 16 modules for the 4 DIP switch model.
This unit contains two aerosol fire-fighting modules inside the battery for safety
measures.
This image is for display purposes only. Do not open your battery! Doing so without proper authorization will void your warranty
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4.2.1 Battery Diagram

No.

Item

Description

Remarks

1

Positive terminal

M6 bolt (x2)

2

RS485 port

RS485 communication interface

Pin 1 & Pin 8 RS485_B Pin 2 & Pin 7 RS485_A

3

CAN port

CAN communication interface

Pin 4 CAN_H Pin 5 CAN_L

4

ALM LED

Alarm status LED

5

RUN LED

Operation status LED

Always on if system is running

6

Reset button

Emergency reset

7

ON/OFF button

Turns BMS on/off

8

Circuit breaker

Shuts down power supply

9

Negative terminal

M6 bolt (x2)

10

Battery-Comm ports Parallel battery communication port

Pin 1 & Pin 8 RS485_B Pin 2 & Pin 7 RS485_A

11

SOC LED

State of charge LED

4 green lights = full charge

12

ID Board

DIP switch board for BMS

May be 4 DIP or 6 DIP

13

LCD Display

Shows battery information

14

Ground screw

Provides safe route for grounding

15

Handle

For carrying/handling battery

7

4.2.2 Emergency Stop (RSD, ESS Disconnect)
The optional ESS disconnect can be used to shut down all batteries and inverters (if equipped) with the push of a button.
This integrated safety feature ties directly into the battery communication system via an open Battery-Com port using a standard Cat-5/6 ethernet cable.
Pins 3 & 6 are used to communicate the emergency stop information to the batteries once the stop button is pressed.
If the inverter is equipped with rapid shut down (RSD) capabilities, the emergency stop feature can be used to initiate this function. Check with your AHJ and NEC code for compliance.
8

5 Installation
5.1 Packaging List and Placement
Packaging List When the product is unpacked, the contents should match those listed below:

(1) EG4-LL battery module

(1) Inter-battery communication cable

(1) ea. 6 AWG Positive and Negative color-
coded connection cables

(4) M6-1.0 Terminal Bolts

Battery to PC – USB Communication Cable

5.2 Location Selection and Installation
5.2.1 Storage
There are a few steps you can take to ensure that batteries are stored safely and in a state that will ensure they are not damaged during storage. These are detailed below.
Battery State
The state of the battery when placed into storage will affect how long it can be stored as well as the battery’s condition when it is brought out of storage. EG4® recommends that each battery is brought to a 100% SOC (state of charge) before placing it in storage. Lithium iron phosphate batteries will lose a certain percentage of their total charge while in storage, depending on how long they are stored and the conditions they are stored in. We recommend recharging the batteries after 8 9 months in prolonged storage.
Environmental Factors
The environment you store your EG4® battery in can greatly affect the health of the battery. For best results, the temperature should remain moderate, between 41°F and 68°F (5°C and 20°C). Keep the battery away from locations where it may get wet or locations with high humidity (>55%). Store the batteries away from combustible materials.

9

5.2.2 Requirements for Installation
Warning
· Do not put EG4® 48V-LL batteries in series. The BMS and internal components are not designed to handle this setup, which could cause the modules to fail.
· Avoid exposing batteries to conductive materials, such as water, strong oxidizers, and strong acids.
· Avoid putting batteries in direct sunlight or on extremely hot surfaces. · Keep all flammable materials out of the working area. · Use caution when handling batteries and/or battery-powered devices to avoid damaging the
battery casing or connections. · Before using batteries, inspect them for signs of damage. Never use damaged or puffy batteries.
Please contact the distributor if a battery is received in this state or experiences this issue. Important
Never position the battery upside down or face down!

Best

Acceptable

10

5.2.3 General Installation

Cable size 2 AWG

Min. Insulator Voltage 600V

Torque Value 60 in. lbs. (7 Nm)

Max Recommended Distance 15 ft.

Note: This chart applies for a 100A continuous output (one battery). Where ambient temperature is above 86°F (30°C), cable size must be increased according to NEC 310. The 6 AWG cable included in the package is intended only for the connection from the module to an EG4® battery rack busbar.
Danger
When adding or removing a battery from any rack, cabinet, or busbar, turn off ALL batteries, and use a voltmeter to confirm there is no voltage present. This will prevent users from encountering live (powered) busbars by accident. Failure to do so can result in severe injury and/or death.
Tools needed for installation
The tools required may vary depending on how you choose to mount your battery. Typically, the following items are needed to install the battery into an EG4® battery rack solution or general racking.
1. 10mm socket and ratchet 2. Phillips head screwdriver 3. Torque wrench 4. M6-1.0 terminal bolts (included in package) Connecting cables to the battery terminals and busbars
EG4® recommends you only use a properly sized (amp rated) busbar to parallel batteries together. Paralleling via the battery terminals may cause inconsistent charging and discharging issues in the bank.
1. Identify the positive and negative terminals of your battery. These are labeled and color coded (red for positive, black for negative).
2. Verify you have all hardware to attach the cable properly. Check to ensure the bolt threads fully into the terminal and can be tightened to the proper torque.
3. Connect the cables to your battery terminals by removing the M8 terminal bolts, inserting them through the eyelet of the proper cable, and reseating the bolt into the terminal block to the correct torque.
4. Connect the positive battery cables to your positive busbar by removing the bus bolts, inserting them through the eyelets of the proper cable, and reseating the bolt into the busbar to the proper torque value. Repeat with all negative cables.
5. DO NOT finger tighten the battery terminal bolts. They require a specific torque to ensure they do not loosen during operation. Failure to properly tighten the terminal bolts can result in serious damage and will void your warranty.

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5.2.4 Installation in EG4® Battery Rack
1. Insert the battery into the rack slot, beginning with the top slot and progressing downward. Slide in until the battery is firmly seated in the rack.
2. Use the included 6 AWG power cable to connect each battery to the busbar.
3. DO NOT finger tighten the battery or busbar terminal bolts. Both require a specific torque [60 in. lbs. (7 Nm)] to ensure they do not loosen during operation. Failure to properly tighten the terminal bolts can result in serious damage and will void the warranty.
4. Clearly identify the location of the system’s positive and negative terminals–red to the positive terminal and black to the negative terminal–to ensure no connection errors. Then connect to the equipment or switch terminals.
Grounding You can attach a grounding wire from the rack/cabinet to an equipment grounding conductor, then terminate the EGC at a grounding electrode.
Warning Do not ground rack/cabinet or door to
negative or positive bus bars!
In this image, there are 6 EG4®-LL 48V 100Ah batteries wired in parallel. This battery bank still maintains the appropriate 48V needed for a system. However, the Amp hour rating of this bank has increased to 600Ah. In addition, the potential output amperage of the rack increases. Size main battery cables appropriately! Refer to an NEC approved ampacity chart for specifications.
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5.3 Battery Communications
Each EG4® battery is designed with you in mind, displaying as much information as possible in the simplest manner. EG4® Electronics includes the option of connecting the battery to PC software to monitor the module status. This allows you to see and understand exactly what the battery is doing as well as troubleshoot if problems arise.
When a single battery is used, it will communicate directly with the system via the RS485 or CAN port. The battery will connect via a properly pinned battery communications cable (not included).
The communication cable from battery to battery is a standard Cat5 cable. If you need a longer cable to reach from your system to your master battery and would like to create your own, please refer to the Communication Cable Pinout Table in Section 5.3.2
5.3.1 Connecting multiple batteries in parallel
1. Ensure all battery breakers and BMS are OFF.
2. Set the address code of each battery according to the DIP Switch ID Table (see Section 5.3.2: DIP Switch ID Table), making sure there are no duplicate addresses.
3. Establish communication between the batteries via the “Battery-Comm” ports starting with the right port on the last battery address and terminating on the left port of the host.
4. The battery with DIP Switch ID 1 (referred to as the host) connects to the system via communication cable using the RS485 or CAN port. (See image to the right)
5. Power on each battery breaker and BMS ON/OFF switch one at a time beginning with the host battery.
5.3.2 Communication Cable Pinout and DIP Switch ID Tables
EG4®-LL batteries interface with an inverter by designating a “Host” battery (DIP switch ID No. 1). The ID code range is 164 (1 16 for the 4 DIP model), and the communication mode can support up to 64 modules in parallel (16 with the 4 DIP model).
Remember
If you have multiple batteries, all DIP switch settings must be different from each other. This allows all equipment to see each battery in the bank separately.
13

Communication Cable Pinout & Table*

RS485-B RS485-A CAN High CAN Low

Description

1

RS485-B

2

RS485-A

3

CAN Ground (optional)

4

CAN High

5

CAN Low

DIP switch ID table 4 Pin

*Pinouts are for battery side, please refer to your system manual for pinout configuration on system end.
DIP switch ID table 6 Pin

14

5.4 Installing with Different EG4 ® Battery Models
EG4® LL-V2 batteries can communicate with all EG4 ® 48V server rack modules. However, you will need to apply the proper firmware to any LL-V1 and/or Lifepower4 modules before installation. Please visit http://www.eg4electronics.com/downloads for the latest firmware.
To system
1. Always use the newest model of LL at the top of your rack as this will need to be the battery that communicates with the system. This battery is also known as the master and will need to have ID number 1.
2. When installing the batteries, ensure that the same models are grouped together in the bank. This allows for communication to flow between the batteries consistently.
3. After installing the batteries into the rack, refer to the DIP Switch ID table to assign the address code of the bank in numerical order, beginning with the master and progressing among the different models. The image on the left shows a bank with the following EG4® modules: 1. LL- V2 (6 DIP) [ID-1] 2. LL- V2 (6 DIP) [ID-2] 3. LL- V2 (4 DIP) [ID-3] 4. LL- V2 (4 DIP) [ID-4] 5. LL- V1 [ID-5] 6. Lifepower4 [ID-6] 15

6 Battery Operation
6.1 LCD Screen
Each module has a built-in HD LCD touch screen used to display important information about the cells including voltage, current, temperature, SOC, and others.
6.1.1 Button description
There are 4 function buttons below the display with detailed descriptions, as shown in the table below.

No. Description

1

Up

2

Down

3

Return

4

Enter

6.1.2 Waking up the LCD screen
Press any key to wake up the screen when the power is on, and the information will be shown on the display.

Main Page Information

No.

Module Description

1

Battery Name

2

Status

3

Voltage

3

4

Current

5

System Date & Time

4

6

SOC

5

6

16

6.1.3 Cell Information
Check individual cell voltage by pressing the “Enter” button on the main page of the LCD screen (shown in mV). There are 2 pages. Pressing “Up” and
“Down” changes the page.
Page 1
6.1.4 Temperature Information

Page 2
Press “Enter” on the Cell Voltage page to view the temperature information of the PCB and the cells (Shown in °C)

6.2 Communication Protocol Selection
Remember
Only the host battery (Address 1) needs to be set to the inverter protocol; all other batteries must have unique addresses starting at address 2 and ascending in chronological order. You must connect the CAN/RS485 port of the host battery to your inverter’s (or communication device’s) BMS communication port.
6.2.1 Protocol Change/Selection Procedure
1. Power off all battery DC breakers and BMS power buttons. Ensure that the voltage between positive and negative busbars is 0V.
2. The inverter protocol can only be changed with the host battery temporarily set to address 64 (all dials right) or address 16 for the 4 DIP switch model (all dials down). After the dial is changed, restart the battery (with only the BMS power button) for the settings to take effect. (See image on right.)
3. On the host battery, press and hold the “Return” key for 5 seconds to enter the “Protocol Setting.”

17

4. Select the corresponding RS485 program or CAN program, and press Enter.

4

CAN Protocol P01-GRW P02-SLK P03-DY P04-MGR P05-VCT P06-LUX

Inverter Growatt Sol-Ark
Deye Megarevo
Victron Luxpower

RS485 Protocol P01-EG4 P02-GRW P03-LUX P04-SCH

Inverter EG4
Growatt Luxpower Schneider

5. Press the “Return” key to return to the main interface.

6. Change the host DIP switch address back to address 1. (See image on right.)

7. Power cycle the host battery, and the BMS will correspond to the protocol selected.

6.3 BMS Tools Installation and Interfacing

The PC software “BMS Tools” provides real-time battery analysis and diagnostics. The battery cannot communicate with BMS Tools and a closed loop inverter at the same time.

6.3.1 Downloading and Installing BMS Tools

1. Visit eg4electronics.com/downloads to get the latest version of the software for free. It can be found in the “Software and Drivers” section.

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2. Once downloaded, locate the file. (This is typically in the Downloads folder.) 3. Right click on the folder and click “Extract All.” Verify the location the file will be extracted to for
future reference. Check the box “Show extracted files when complete” and click on “Extract.”
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4. Open the folder to access BMS_TOOLS. Right click and click “Run as administrator.” You may see a popup for Microsoft Defender appear. Click “More info,” and then click “Run anyway.”
5. You will be brought to the main page of BMS Tools.
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6.3.2 Interfacing with BMS Tools

2

3

1. Press the ON/OFF button on the battery to power off the BMS.

2. Set the DIP switch ID address of the

battery to Address 64 (6-pin DIP, see

A

image A) or Address 16 (4-pin DIP, see

image B).

3. Connect the included battery-to-PC USB cable to your PC and to the RS485 port on the battery. (If BMS Tools is running on your PC, close the program before
continuing.)
4. Press the ON/OFF button to power on the battery.

1 2
3

5. In the search bar at the bottom of the PC screen, type “Device Manager.”

B

6. Open “Device Manager”, and double click
on “Ports” to look for the COM port the
battery is in. (See image below.)
1

2

1

3

4

21

7. Open BMS Tools. Under “Monitor Status,” verify “COM” matches the battery COM from the previous “Ports” list. Verify “Baud Rate” is set to 9600, and “PACK ID” is set to 16, then click “SearchDevice.” After about 30 seconds, BMS Tools will begin the monitoring process and pull real-time data from the BMS.
8. To review these steps, please watch our step-by-step guide at https://youtu.be/Axhc8_22Go0.
6.3.3 Interface menu definition
Warning Although there are multiple tabs in the BMS Tools software, the following tabs should not be tampered with as any unauthorized changes will void the warranty of this product and risk damaging and/or rendering the product permanently inoperable.
· BMS Parameter · BMS Control · Software Parameter If you are experiencing any issues with the battery module or the BMS, please contact your distributor for assistance or troubleshooting steps.
22

Interface menu definition

Item BMS Monitoring
BMS Parameter
BMS Control BMS Datalog Historical Record Communication Software Parameter

Definition Real-time data and status monitoring of the BMS (see Section 7.2.1:
Warning and protect status definitions table) BMS parameter setting management (restricted, unauthorized
changes will void warranty) Control state management of BMS (restricted, unauthorized
changes will void warranty)
BMS operation data logging to PC (for manufacturer use)
Real-time BMS operation data records (exportable)
Record of sending and receiving of battery pack data (exportable)
Software configuration, settings, and language selection (restricted, unauthorized changes will void warranty)

6.4 Battery Charging
6.4.1 Charge cycle
Ensure the proper settings are set on the charge controller and/or inverter being used to avoid overcharging or damaging the module. (Refer to Section 9.1: Technical Specifications Table for a full list of charging/discharging parameters.)

23

Important (SOC Discrepancy)
It is normal for LFP batteries that have their own internal BMS and that are wired in parallel to demonstrate a wide variety of SOC readings during any given charge or discharge cycle. Variations of up to 10% are common. This is not cause for concern or indication that the module is providing less than the maximum capacity. This is caused by even slight variations in wiring resistance to each battery, internal resistance, temperature differences, and even variations in each cell. Even a slight variation causes one battery to take more of the load or charge for a short time. Over the duration of the discharge or charge cycle, this will balance out with the lagging battery then taking the load or charge at the other end of the cycle resulting in recovering the full listed KWH capacity of the pack. The voltage differences created as batteries diverge in SOC will eventually cause them to converge at some point in the cycle.
7 Troubleshooting, Maintenance & Disposal
7.1 Introduction to the BMS
The BMS (Battery Management System) is intended to safeguard the battery and battery cells against a variety of situations that could damage or destroy system components. This protection also aids in keeping the battery and battery cells operational for a greater number of life cycles. Each EG4®-LL battery is specifically configured to ensure peak performance and operation with any system.
7.1.1 BMS Protection
PCB temperature protection
The BMS will ensure that the Printed Circuit Board (PCB) does not overheat. This is the part that houses most of the “brains” of the battery. This feature will turn off the battery if it begins to overheat.
Cell balance protection
Cell balance ensures that each cell is within a specific voltage range of each other. Cell balance is crucial for ensuring that the battery is operating properly for its lifespan. This is always done automatically.
Environmental temperature protection It may be dangerous to attempt using the battery in extreme heat or cold. Continued operation in these conditions may result in permanent damage to the battery module and its components. To prevent this, the BMS is designed to measure the temperature while charging/discharging and will shut down the battery to prevent damage. Voltage protection The BMS is designed to continuously monitor the voltage of each individual cell and ensure that they are not over/undercharged.
24

Current protection
The BMS is designed to constantly monitor the charge/discharge amperage and has built-in safeguards against exceeding specific parameters. These include built-in timers that shut off quickly in the event of short circuits, extremely high amperage and delayed shut down for amperage that is only slightly above the maximum capacity.
7.2 Troubleshooting
7.2.1 Alarm Description and Troubleshooting

When the ALM light on the battery control panel is on, it means that the battery has given an alarm or has been protected from potential damage. Please check the cause of the failure through the app or BMS Tools and take appropriate measures or go directly to the battery site to troubleshoot.
BMS Tools alarms are shown in the table below:
Warning and protect status definitions table

Status

Name

Pack OV

Warning/ Protect

Cell OV Pack UV Cell UV Charge OC Discharge OC Temp Anomaly
MOS OT

Charge OT Discharge OT
Charge UT

Discharge UT

Warning Warning Protect

Low Capacity Other Error Float Stoped

Protect Discharge SC

Helpful tip

Definion
Pack over-voltage
Cell over-voltage Pack under-voltage Cell under-voltage Charge over-current Discharge over-current Temperature anomaly
MOSFET over-temperature
Charge over-temperature Discharge over-temperature Charge under-temperature
Discharge undertemperature
Low batery capacity Error not listed Float Stopped
Discharge short circuit

Acon
Module needs to be discharged to lower its voltage.
Check individual cell voltage in BMS Tools.
Module needs to be charged.
Check individual cell voltage in BMS Tools.
Incoming current needs to be reduced.
Discharge current is too high; lower loads.
Check ambient and module temperature. BMS temperature is too high. Power off
module and cool down locaon. Power off module and cool down locaon. Power off module and cool down locaon. Power off module and warm up locaon. Power off module and warm up locaon.
Module needs to be charged.
Contact the distributor
Contact the distributor Discharge current is too high, turn BMS and breaker off and back on to reset. Lower loads

The “Historical Record” tab can indicate what occurred with the module before entering a warning or protection state. It is recommended to export this data into a text (.txt) file to provide to the distributor for any additional troubleshooting assistance.

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