WINDY NATION BAT-LFP12-100 User manual

BattaMax Lithium User Manual
Revision 1.0
Page 1 of 14
windynation
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windynation
BattaMax Lithium
Lithium Iron Phosphate (LiFePO4) – Deep Cycle SMART Battery
BAT-LFP12-100
User’s Manual

BattaMax Lithium User Manual
Revision 1.0
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Table of Contents
1Introduction ..................................................................................................................................................3
1.1 Safety ...................................................................................................................................................... 3
1.2 Definitions................................................................................................................................................3
2Product Overview.........................................................................................................................................3
2.1 Features .................................................................................................................................................. 4
2.2 Applications............................................................................................................................................. 4
2.3 Specifications ..........................................................................................................................................4
2.3.1 Electrical Specifications.......................................................................................................................4
2.3.2 Physical Specifications........................................................................................................................4
3Installation....................................................................................................................................................4
3.1 Environment ............................................................................................................................................ 5
3.1.1 Temperature........................................................................................................................................5
3.2 Connections............................................................................................................................................. 5
3.2.1 Wire Gauge Reference........................................................................................................................ 5
3.2.2 Threaded Terminals ............................................................................................................................ 5
3.3 Configuration........................................................................................................................................... 6
3.3.1 Series Connection............................................................................................................................... 6
3.3.2 Parallel Connection .............................................................................................................................6
3.3.3 Series-Parallel Connection..................................................................................................................7
4Service and Maintenance ............................................................................................................................7
4.1 Charging.................................................................................................................................................. 7
4.1.1 State of Charge (SOC)........................................................................................................................7
4.1.2 Cell Balancing......................................................................................................................................7
4.1.3 Temperature Compensation................................................................................................................ 8
4.2 Discharging.............................................................................................................................................. 8
4.2.1 Cycle Life versus Capacity..................................................................................................................8
4.3 Maintenance............................................................................................................................................ 8
5Battery Management System (BMS) ...........................................................................................................9
5.1 BMS Application...................................................................................................................................... 9
5.1.1 iPhone .................................................................................................................................................9
5.1.2 Android ..............................................................................................................................................10
5.2 BMS Settings.........................................................................................................................................10
5.2.1 General..............................................................................................................................................10
5.2.2 Capacity Configuration......................................................................................................................10
5.2.3 Balancer Configuration...................................................................................................................... 11
5.2.4 Function Configuration ......................................................................................................................11
5.2.5 PIN / BMS Name...............................................................................................................................11
5.2.6 Protections.........................................................................................................................................11
5.2.7 NTC Settings.....................................................................................................................................11
5.3 Calibration .............................................................................................................................................11
6Storage, Transportation, and Disposal ......................................................................................................11
6.1 Temperature Effects on Storage...........................................................................................................12
6.1.1 Hot Environments (greater than 90°F or 32°C).................................................................................12
6.1.2 Cold Environments (less than 32°F or 0°C) ......................................................................................12
6.2 Transportation .......................................................................................................................................12
6.3 Disposal - Recycling..............................................................................................................................12
7Testing and Support...................................................................................................................................12
7.1 Troubleshooting.....................................................................................................................................12
7.2 Testing: Open Circuit Voltage ...............................................................................................................13
7.3 Testing: Discharge – Capacity ..............................................................................................................13
7.4 Support.................................................................................................................................................. 13
7.5 Limited Warranty ...................................................................................................................................13
7.5.1 Restrictions........................................................................................................................................13
7.5.2 Warranty Claims & Return Procedures.............................................................................................13
7.5.3 Disclaimer..........................................................................................................................................14
7.5.4 Limitation of Liability..........................................................................................................................14

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1 INTRODUCTION
Deep cycle batteries are a key component in various types of renewable energy systems and the primary
method to store direct current (DC) power produced from sources like solar panels and wind generators. A
battery bank can provide a relatively constant power source when the grid is down or during periods when your
renewable energy system is not producing power and the BattaMax Lithium offers longer life cycles, lighter
weight, higher power, and superior safety over traditional lead acid batteries.
This manual contains vital information regarding proper care and maintenance of your BattaMax Lithium battery.
Read through this User’s Guide carefully and completely BEFORE using and installing your battery.
The manual will provide safety guidelines and procedures for using your battery to ensure optimum performance
and long life. The manual will not provide details about any of the connected equipment to the battery (e.g.:
charge controllers, inverters, etc.). Information concerning any connected equipment should be available from
the equipment manufacturer.
1.1 SAFETY
Windy Nation Inc. (“Windy Nation”) is not assembling or installing the product and therefore Windy Nation, its
directors, officers, and employees disclaim that by purchasing a Windy Nation product you accept all liability and
responsibility for damage to property, injury, or death arising out of or related to the use or misuse of any
product offered by Windy Nation.
Installation and servicing should be referred to qualified service personnel.
Remove all sources of power (photovoltaic, wind generator, battery chargers, etc.) before servicing or
installing.
Battery Safety
Warning: Please observe safety precautions when installing or operating the battery
Do NOT disassemble, open, or modify the battery enclosure.
NEVER smoke or allow a spark, flame, or heat sources within 25 feet of the battery.
Do NOT touch or short circuit terminals or connectors
Be extremely cautious of metal items such as jewelry and tools to reduce risk of short circuit.
Remove all electrically conductive items from your body and clothing before working with or
touching the battery.
Handle batteries with extreme caution; especially when transporting.
Use only insulated tools and wear protective clothing when working with batteries
Do NOT dispose of waste batteries with household waste. Recycle in accordance with local, state,
and federal regulations.
1.2 DEFINITIONS
•Ah Amp-Hours
•AWG American Wire Gauge
•BAT Battery
•BMS Battery Management System
•DOD Depth of Discharge
•LiFePO4 (Li-Ion) Lithium Iron Phosphate
•SOC State of Charge: Available Amp-hours relative to the battery’s full capacity
2 PRODUCT OVERVIEW
The BattaMax Lithium is a smart lithium iron phosphate battery (LiFePO4 or LFP). The battery includes an
integrated Battery Management System (BMS) that offers superior safety and protection during the charging
and discharging stages as well as extensive monitoring and control over the battery.

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The BattaMax Lithium is considered a drop-in replacement for lead acid batteries with a lighter weight of nearly
40% and up to 20x longer cycle life than traditional lead acid batteries. This drastically reduces the total cost of
ownership and minimizes replacements.
2.1 FEATURES
BMS Protection and Monitoring
Automatic Battery Balancing
Compact Design with embedded carry handles
High Quality and High Reliability
Long Cycle Life
6-month storage life
Reliable threaded terminals
ABS plastic container offering excellent impact resistance and strength
2.2 APPLICATIONS
Renewable energy (Solar & Wind) power storage
Telecommunication systems
Alarm and security systems
Backup - Emergency power
Portable DC power
UPS (Uninterrupted Power System)
Marine & RV house power
Electric Vehicles
Medical Equipment
2.3 SPECIFICATIONS
2.3.1 Electrical Specifications
Parameter
BAT-LFP12-100
Nominal Voltage
12.8V (4x 3.2V cells)
Nominal Capacity (25oC)
100 Ah
Internal Resistance
<150mΩ
Cycle Life
>2000 @1C 100% DOD
Max Discharge Current
100A Continuous (300A <3s Pulse)
Discharge Cutoff
10 Volts
Discharge Efficiency
96-99% @1C
Charge Voltage
14.6 +/-0.2V
Max Charge Current
50 Amps
Charge Cutoff
14.8 +/-0.2V
Charge Efficiency
100% @0.2C
2.3.2 Physical Specifications
Parameter
BAT-LFP12-100
Dimension (L x W x H)
13.0” x 6.8” x 8.7” (330mm x 173mm x 220mm)
Unit Weight
22.7 lb. (10.3Kg)
Terminal
T11 (M8 thread)
Container Material
ABS Plastic
Nominal Operating Temperature
25oC +/-3oC (77oF +/-5oF)
Discharge Temperature Range
-20oC to 60oC (-4oF to 140oF)
Charge Temperature Range
0oC to 45oC (32oF to 113oF)
Storage Temperature Range
0oC to 40oC (32oF to 104oF)
3 INSTALLATION
The BattaMax can be used in any orientation as long as the terminals are accessible and are completely clear of
all objects that could cause short circuiting of the battery terminals.
Important: Batteries deliver large amounts of power that can cause injury and even death. Please observe the
rules set forth in Section 1.1 when working on or around batteries.

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Caution: Risk of fire, explosion, or burns. Do not disassemble, heat above 70°C (160°F) or incinerate.
3.1 ENVIRONMENT
Batteries should be installed in a clean, dry area, keeping water, oil, and dirt away from the batteries. The
accumulation of these materials on the batteries can result in self-discharge and possible short-circuits.
If the battery will be used in an enclosure with no air circulation, it is recommended to ventilate the enclosure to
prevent heat buildup.
3.1.1 Temperature
Temperature is a major factor in battery performance and battery life expectancy. The recommended operating
temperature range is between 0oC to 45oC (32oF to 113oF) with a humidity of less than 90%. A minimum
clearance of 0.50” (12.7 mm) between the battery and any other object is recommended to minimize heat
accumulation and avoid heat transfer between batteries.
It is important to note that the temperature of the battery and the ambient temperature can differ significantly. As
an ambient temperature can be changed rapidly, the battery temperature is slower to change due to the thermal
mass of the battery. Batteries that are exposed to colder climates should be kept at a higher State of Charge
(SOC) to prevent freezing. A frozen battery must be completely thawed prior to any use.
3.2 CONNECTIONS
WARNING: Faulty connections can lead to poor performance, terminal damage, and possible fire.
Important: Do NOT connect batteries together of different types or vintages.
Battery cables provide the link between the batteries, equipment, and charging system. The battery cable
should be sized for the maximum load of the system where the voltage drop on the cable will not exceed 0.2
volts. To ensure proper connections, please use the wire gauge reference in Sec 3.2.1. Please note: UL and
NEC electrical cable amperage ratings are lower than the chart below.
3.2.1 Wire Gauge Reference
AWG
Diameter
inches (mm)
Ohms per
1000ft
Maximum
Current (A)
16
0.051 (1.29)
4.016
22
14 0.064 (1.63) 2.525 32
12
0.081 (2.05)
1.588
41
10 0.102 (2.59) 0.999 55
8
0.129 (3.26)
0.628
73
6
0.162 (4.11)
0.395
101
4
0.204 (5.19)
0.249
135
2 0.258 (6.54) 0.156 181
0 (1/0)
0.325 (8.25)
0.098
245
00 (2/0) 0.365 (9.27) 0.078 283
000 (3/0)
0.410 (10.4)
0.062
328
0000 (4/0)
0.460 (11.68)
0.049
380
3.2.2 Threaded Terminals
The BattaMax has two threaded terminals and comes with the necessary bolts and washers to secure a cable
connection.
Place battery connection cable lug (not included) over the threaded insert of the battery terminal ensuring that
the cable lug connection is contacting the metal surface of the terminal. Place the flat washer on top of the cable
lug, followed by the lock washer. Do not place washer between the terminal lead and the battery wire, which
creates high resistance and can cause terminal meltdown.
Add the hexagonal bolt and tighten to a torque of 98-107 (in-lbs), 11-12 (Nm)

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3.2.2.1 Terminal Protection
Corrosion can build up on terminals if they are not kept clean and dry. To prevent corrosion, apply a thin coat of
terminal protector spray that can be purchased through your local automotive parts dealer. The battery terminals
must be inspected prior to each use for corrosion and loose connections.
3.3 CONFIGURATION
Batteries can be connected in series (increases voltage, maintains ah capacity), in parallel (increases ah
capacity, maintains voltage), or in a combination of series and parallel.
The modular design enables deployment of up to a maximum of four (4) batteries in series and up to a
maximum of ten (10) batteries in parallel.
3.3.1 Series Connection
A series connection will increase the system voltage and the system capacity (Ah) will remain unchanged.
For example, if two 12V batteries with 100Ah of capacity are wired in series, the resulting battery bank will be
24V (12V + 12V = 24V) of 100Ah.
3.3.2 Parallel Connection
A parallel connection will increase the system capacity (Ah) and the system voltage will remain unchanged.
For example, if two 12V batteries with 100Ah of capacity are wired in parallel, the resulting battery bank will be
12V of 200Ah (100Ah + 100Ah = 200Ah).

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3.3.3 Series-Parallel Connection
A Series-Parallel connection will increase the system capacity (Ah) as well as increase the system voltage.
For example, if four 12V batteries with 100Ah of capacity are wired in series-parallel, the resulting battery bank
will be 24V of 200Ah.
4 SERVICE AND MAINTENANCE
4.1 CHARGING
BattaMax batteries are charged at the factory and under most cases, are ready for installation when they are
received. Proper charging will maximize battery performance and lifecycle. Undercharging as well as
overcharging batteries will significantly reduce the life of the battery.
It is recommended to fully charge the battery to between 14.4 and 14.6 Volts using a charge controller that is
compatible with lithium iron phosphate batteries. The maximum charge current for the 100Ah BattaMax lithium
battery is 0.5C, which is 50 amps. At this rate, if the battery is completely empty, it will take 2 hours to
completely charge the battery. A charge rate of 0.5C for a 100Ah battery is 50A charge current. Keep in mind,
that the higher the charge current, the more heat will be produced and, as such, proper ventilation space is
needed around the batteries. Depending on the installation, hot air extraction or forced air cooling might be
needed in high current charge applications.
Important: LifePO4 Batteries do not have “memory”, so they can be fully charged after each discharge of at
least 30 minutes.
Caution: Never charge a frozen battery and never charge a battery at temperatures above 45oC (113oF)
4.1.1 State of Charge (SOC)
Charge Percentage
(%)
Cell
(Open Circuit Voltage)
Battery
(Open Circuit Voltage)
100 (Charging)
3.65
14.6
100 (Rest)
3.40
13.6
80
3.33
13.3
60
3.28
13.1
40
3.25
13.0
20
3.20
12.8
0
2.50
10.0
4.1.2 Cell Balancing
The battery contains four lithium cells connected in series. Over the lifecycle of the battery, the cells will become
charged or discharged at different proportions. Unbalanced cells do not necessarily cause damage, but it can
cause a reduction in capacity. The BattaMax Lithium battery has a built-in cell balancing feature that monitors
the voltage of each cell and transfers energy between them until all cell voltages are within 0.01 volts of each
other. This transfer happens when the cell reaches full charge.

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4.1.3 Temperature Compensation
The BattaMax has internal temperature sensors that can be monitored and configured to prevent charging and/
or discharging at extremely low or high temperatures.
Many charge controllers offer a Battery Temperature Sensor (BTS) that automatically adjusts the charging
parameters based on the measured battery temperature. External temperature compensation is not needed with
the BattaMax Lithium battery, so any external BTS may be left disconnected from the charge controller or set
the compensation to “0”.
4.2 DISCHARGING
A major advantage of lithium batteries over lead acid, is that nearly the entire capacity of the battery can be
utilized. Although they can be discharged to nearly 3% of their capacity, it is still important to not allow them to
discharge too deeply.
The BattaMax can be discharged at a continuous rate of 1C or 100 Amps. For short discharge pulses of less
than 3 seconds, the battery can be discharged at a rate of 3C or 300 Amps. Keep in mind that higher discharge
rates will produce more heat and may require additional ventilation.
The BMS will turn off the output of the battery as soon as a battery voltage drops below the low voltage
threshold; default =10V. If the battery shuts off due to low state of charge (SOC), disconnect any loads
connected to the battery to eliminate potential parasitic loads and charge the battery as soon as possible.
Parasitic loads are usually small loads that draw an idle current such as alarm systems, relays, back current
drain of battery chargers or charge regulators. In addition, the battery itself also has a small amount of self-
discharge.
Important: Failure to do so may cause irreversible damage to the battery.
4.2.1 Cycle Life versus Capacity
The following chart shows the expected capacity over the life of the battery
4.3 MAINTENANCE
BattaMax batteries are maintenance free but as with any battery, require periodic inspections and parameter
recording to ensure effective operation and identify issues before they become problematic.
1. Examine the outside appearance of the battery. The tops of the batteries and terminal connections
should be clean and dry, as well as free of dirt and corrosion.
2. Check battery cables and connections. Replace any damaged cables and tighten any loose
connections.
3. The following will only be done when all electrical connections are completely disconnected from the
battery. Clean the top of the battery, terminals and connections with a damp cloth or brush, using a
solution of baking soda and water (1 cup of baking soda to 1 gallon of water). Next, thoroughly wipe the
battery with a damp cloth of pure water until the baking soda/water solution has been completely
removed. Lastly, completely dry the battery with a clean cloth and re-apply a thin coat of terminal

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protector spray to each battery terminal. Confirm the battery is completely dry before attaching
electrical connections.
4. Periodically check the battery’s state of charge. Lithium batteries will slowly self-discharge when not in
use or whilst in storage.
5 BATTERY MANAGEMENT SYSTEM (BMS)
BattaMax batteries contain a Battery Management System (BMS) that provides the ability to monitor your
battery status via a Bluetooth Smartphone app and protect the battery cells from excessive high and low
voltage, temperature, and current conditions.
5.1 BMS APPLICATION
Notes: If more than one version of the application is available install the latest version of the app.
Bluetooth supports one-to-one mode, so only one device can connect to the BMS at a time.
Capacity information requires two (2) full charge / discharge cycles to properly calibrate.
Installation requires Android version 6.0 or later and IOS 12.0 or later to operate.
1. Download the application Xiaoxiang BMS from the app store; links below:
iPhone: https://apps.apple.com/us/app/xiaoxiang-bms/id1375405426
Android: https://www.pgyer.com/Bzt1 (Android_app_xiaoxiangBMS_3.1.1026.apk)
NOTE: Must allow 3rd party apps to install on Android
2. Ensure the phone’s Bluetooth is enabled (Settings
 Bluetooth  radio button selected)
3. Open the app from within 30 feet of the battery and the battery should be in the list of devices found.
4. Click on the device to display the basic info for your BMS.
5.1.1 iPhone
The Main screen has three radio buttons located at the bottom of the screen:
1. batt off: Turns off the battery
2. batt on: Turns on the battery
3. config: Opens the configuration page and allows BMS settings to be edited; requires Pro Version of the
app; see section 5.1.1.1

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5.1.1.1 Pro Version
To access the configuration screens of the application, the purchase of the Pro version of the application is
required. Once purchased the config button becomes active and can be clicked to open any of the five
configuration pages located at the bottom of the config screen:
Page
Description
Settings
Allows Naming of BMS for each battery in your system, Temperature to be displayed as
Celsius or Fahrenheit, and PIN Settings
BMS Settings
Allows read and write functions of the BMS settings. BMS read will display settings from
the BMS. After adjusting any settings, click BMS write to update the BMS.
See Section 5.2 for recommended settings.
Configuration settings can be saved by selecting “save configuration” and loaded to the
BMS by selecting “open configuration”.
Current Calibration
Charge and discharge current measurements can be calibrated; See Section 5.3
Voltage Calibration
Charge and discharge voltage measurements can be calibrated; See Section 5.3
Notifications
Allows for a preconfigured notification to be sent to your phone.
Notifications only work if the app is running, and the phone is connected to the BMS
5.1.2 Android
Once connected, two pop-up screens will appear:
1. Capacity Setting: Set Nominal capacity to 100.0 Ah and Cycle capacity to 99.0 Ah
2. Use GPS to test speed: Select “NO”; this is for mobile battery applications; e.g. electric scooters.
To access the configuration screens of the application, select the menu icon (hamburger icon) in the top of the
screen. This will open a menu for seven configuration pages:
Page
Description
DASHBOARD
Returns to the Main Menu
BATTERY STATE
View individual cell voltages
PARAMETER VIEW
View / read current BMS settings
PARAMS SETTING
Allows for customization of BMS settings; See Section 5.2 for recommended settings.
FUNCTION SETTING
General BMS settings: external switch on/off, load check on/off, balance enable on/off,
charge balance on/off, and NTC temp sensors on/off; See Section 5.2
APP SETTING
Setting of password, naming of battery
ABOUT XIAOXIANG
Information about the creator of the app
5.2 BMS SETTINGS
5.2.1 General
Parameter
Description
Value
Number of Cells
Total number of cells in battery
4
5.2.2 Capacity Configuration
Parameters used to display battery capacity and calculate the battery state of charge (SOC)
Parameter
Description
Units
Value
Total battery Capacity
Advertised battery capacity
mAh
100000 (100Ah)
Total Cycle Capacity
Usable battery capacity
mAh
99000
Cell full Voltage
Battery cell voltage at full charge
mV
3650
Cell minimal Voltage
Battery cell voltage at end of discharge
mV
2600
Cell Self-Discharge Rate
Discharge rate when battery is idle with no load(s)
%
0.2
Cell 100% Cap. Voltage
Battery cell voltage at each indicated percentage
charge level
mV
3400
Cell 80% Cap. Voltage
mV
3300
Cell 60% Cap. Voltage
mV
3280
Cell 40% Cap. Voltage
mV
3250