POWERWIN BT10 User manual

User Manual
LiFePO4 Battery12.8V 10Ah
R

Model Name BT10
Battery Cell
Series-parallel
3.2V/10Ah（LiFePO4）
4S1P, 12.8V/ 10 Ah total.
Rated Power 128Wh
Service Life 6000+ (to 80% DoD.)
Charging Current 2-5A
Charging Voltage 14.2 - 14.6V
Charging Mode Constant Current (CC)
Constant Voltage (CV)
Operating Temperature Charge: 0-45°C
Discharge:-20-60°C
Discharge current 5A
Max. Discharge current 10A
Net Weight 2.2lbs / 1KG
Size 6”*2.6”*3.7” / 152*66*94 mm
1. Technical Specification

3. Charging Methods
A. Battery Characteristics & Charging Mode
The voltage measured during charging or discharging LiFePO4 batteries
may not accurately represent their actual voltage.
After charging or discharging and disconnecting the battery, the voltage
may gradually settle to its true voltage over time.
2. Pleae Read Before Use
1. When using the battery for the first time, fully charge it before use.
2. Do not expose the battery to water or rain.
3. Do not charge the battery in the presence of fire or extreme heat.
4. Avoid using or storing the battery near heat sources such as a fire or
heater. If the battery leaks or emits an odor, remove it from the vicinity of
an open flame immediately.
5. Ensure that the positive and negative terminals are not reversed.
6. Avoid placing the battery in fire or subjecting it to heat.
7. Do not short-circuit the positive and negative electrodes of the battery
using wires or other metal objects.
8. Do not puncture the battery housing with nails or other sharp objects,
and avoid hammering or pedaling on the battery pack.
9. Disassembly of the battery and its components is strictly prohibited.
10. If you notice any unusual signs such as an odor, heat, deformation,
discoloration, or any other abnormal behavior from the battery, stop using
and disconnect immediately.
11. Avoid using the battery in a high-temperature environment, as it may
overheat and affect its performance and shorten its service life.
12. If battery electrolyte contacts your eyes due to a leak, do not rub your
eyes. Rinse your eyes with water right away and seek medical help.
Immediate action is essential to prevent potential eye damage.

Note
Phase I： CC (Constant current)
B. Charging Mode
Method 1: Battery charger
Recommended charging voltage: 14.2V to 14.6V
Recommended charging current:
Use a dedicated 14.6V LiFePO4 battery charger to maximize the
battery's capacity.
The 2A (0.2C) battery will be fully charged to 100% capacity in about 5 hours.
The 5A (0.5C) battery will be charged in about 2 hours at 97% state of Charge.
Initially, a discharged battery will be charged at a constant current, and
the voltage will rise steadily until it reaches a constant voltage point,
which varies with different charging method.
Phase II: CV (Constant Voltage)
In this phase, the battery maintains a constant voltage while the current
rating drops to 2A (0.02 c), which is also known as constant current mode.
To accurately test the battery's real voltage, disconnect all connections
and measure it after resting for over 30 minutes. The expected true
voltage should be around 13.4V.
Voltage/ V
Current/ A
Phase I: CC Phase II: CV

Undervoltage Alarm
Undervoltage Recovery
11.6V
12V
Low-voltage Protection 11V
Low-voltage Recovery 12.4V
Charging Specs Discharging Specs
Charging Voltage
Overvoltage Protection
14.6V
14.8V
Overvoltage Recovery 14.2V
Equalizing Current 0.2A
Method 2: Solar Panel and Controller
Solar Panel
Recommended power : 30W
A 300W solar panel, fully charge in one day (effective power: 4 hours/ day)
It might take more than a day to fully charge, because the duration and
intensity of light are important factors of charging efficiency.
Solar Charge Controller
Recommended charging mode: 12V (14.6V)
Recommended charging current:
a. Connect the charger to the battery before plugging it into the power
outlet to prevent sparks and potential fire hazards.
b. Disconnect the charger from the battery once it is fully charged.
c. Avoid reversing the positive and negative terminals during connections.
The 2A (0.2C) battery will be fully charged to 100% capacity in about 5 hours.
The 5A (0.5C) battery will be charged in about 2 hours at 97% state of Charge.
Note
If you need to manually configure the controller, please use the following
parameters. It's important to note that these settings are specifically
designed for LiFePO4 batteries, as different battery models have different
charging requirements.
Notes

4. How to Connect (series & parallel)
A. Definition
Method 3: Alternator / Inverter
Recommended charging voltage: 14.2V to 14.6V
Recommended charging current:
The 2A (0.2C) battery will be fully charged to 100% capacity in about 5 hours.
The 5A (0.5C) battery will be charged in about 2 hours at 97% state of Charge.
The battery can be charged via an alternator, or an inverter.
A. If your alternator or inverter provides DC output, consider
incorporating a DC-DC charger between the battery and the generator.
B. If your alternator or inverter supports AC output, follow the charger's
recommendations to add an appropriate battery charger between the
battery and the generator.
Step 1:
The battery is connected to the battery with a total input and output
cable, and two copper bars are added to multiple connecting cables.
Connect batteries to batteries by referring to the wiring diagram.
Step 2:
Connect the positive output cables of all batteries to a copper bar.
If you are connecting batteries in series (where the positive terminal of
one battery connects to the negative terminal of another), do not connect
the positive electrode to the copper bar to ensure a proper series
connection for the battery system.
Step 3:
Connect the load to the copper bar. The cable table used in this step
should be able to support the total input and output current of the entire
battery system.

12V(12.8V) 400Ah battery system
Connect in Parallel
Connect in Series
Note
48V(51.2V) 100Ah battery system
When you connect batteries in series, the voltage increases
while the amperage (ampere) remains the same.
For example, if you connect two 12.8V 10Ah batteries in series,
the battery system's voltage will be 25.6V, and the capacity
remains at 10Ah.
For example, if you connect two 12.8V 10Ah batteries in
parallel, the battery system's voltage remains at 12.8V, and
the capacity will be 20Ah.
Note
When you connect batteries in parallel, the ampere increases
while the voltage remains the same.
Up to 16 identical batteries connection： 4 in series for 48V
(51.2V) & 4 parallel for 40Ah battery systems in total.
Restrictions

4. Before Connection
A. Safety Precautions for Battery Connection:
1. Always wear insulating gloves before making any connections.
2. Avoid reversing the battery's polarity or creating short circuits
when connecting the positive and negative terminals.
2.For systems with multiple batteries, consider performing
voltage equalization every 6 months to address potential
voltage differences that may occur after five months of use.
This helps maintain consistent voltage levels between battery
packs and ensures optimal performance in series and parallel
setups.
B. Balancing Voltage in Parallel Battery Connections:
1. When connecting batteries in parallel, ensure the voltages are equal.
5. Equalization steps
1. Charge each battery individually to its full capacity.
2. Connect the batteries one at a time in parallel and allow them
to sit together for 12-24 hours, but no more than 4 groups.
3. The battery pack can be connected in both series and
parallel configurations.
When using batteries in series and/or parallel modes, please
ensure that the following conditions are met:
a. Use batteries with the same battery capacity (Ah) and BMS (A).
b. Choose batteries from the same brand (different brands of
lithium batteries may have unique BMS requirements).
c. Purchase batteries from nearby sources (within 1 month).
Restrictions

Battery voltage / capacity
Energy
25.6V / 20A
512Wh
Max. Discharge Current 20A
Max. Load Power 512W
51.2V / 20A 25.6V / 40A
1024Wh 1024Wh
20A 40A
1024W 1024W
6. Other Connection Modes
7. For Extended Storage
8. Transportation Precautions
1. When storing the battery pack for an extended period, ensure that the
storage temperature remains within the range specified in the product
specifications.
2. Long-term storage, defined as exceeding three months, should be
conducted at a temperature of 25±5°C and a relative humidity of
65±20%RH.
3. Prior to storage, it's advisable to charge the battery pack to approximately
50-70% of its capacity.
1. During transportation, the battery pack must be adequately packaged
to prevent severe vibration, impacts, and compression.
2. Protect the battery pack from exposure to direct sunlight and rain.
3. Transportation can be conducted using various means, including cars,
trains, ships, planes, and other appropriate methods.
4. Store the battery pack in a dry, well-ventilated location.
5. If the battery is stored for more than six months, it should be periodically
maintained by cycling through charging and discharging.
6. Avoid exposure to corrosive substances, open flames, and heat sources.
2S2P 4S2P 2S4P

Phenomenon How to solveCause
10. Trouble Shooting
9. Battery Maintenance
1. When maintaining the battery pack, ensure that the battery's power
level is between 40% and 70%.
2. Recommended maintenance for batteries not in regular use involves
recharging every six months using the charger for 1 to 2 hours.
3. During maintenance, refrain from attempting to replace or remove
individual batteries from the battery pack, as this may negatively impact
battery performance.
4. Unauthorized disassembly or dissection of the battery core is strongly
discouraged and should not be attempted.
Battery has no output
The charger indicator
is off
The battery cannot be
charged
The string of output
cable is loose.
The charger output
plug is loose or the
charger voltage is
incorrect.
The battery is fully
charged already.
Check whether the charger
output plug and battery
set firm or change the
correct charger.
The battery can be used
normally.
The battery pack is
dead.
The charger output
voltage is incorrect
or the AC input plug
is incorrect.
Use the correct charger
and plug the charger into
the mains outlet according
to the instructions.
Properly connect the battery
and output cable according to
the specs.
Charge the battery.

12. Warranty
If the problem still exised, because BMS, the protection system has been
triggered, you can try the following steps to reactivate it.
Method 1
Method 2
1. Disconnect the battery from any devices.
2. Wait for 30 minutes, and the battery should return to normal voltage
(above 10 volts).
1. Use a charger with a "0V" function and charge the battery as usual
2. Or charge the battery using an 18V-36V solar panel.
Our company provides customers with warranty of 12 months from
the date of purchase.
11. Packing List
1. POWERWIN 12.8V 10Ah
2. User Manual
13. Customer Service
[e-mail]
If the battery doesn't recover with Method 1, you can: