POWERWIN BT5120 51.2V 100Ah LiFePO4 Battery User Manual

POWERWIN BT5120 51.2V 100Ah LiFePO4 Battery

Specifications

• Model Name: BT5120
• Battery Cell: 3.2V/100Ah LiFePO4
• Cell Configuration: 16S1P
• Rated Power: 5120Wh
• Service Life: 6000+ (to 80% DoD)
• Charging Current: 20A-50A
• Charging Voltage: 56.8 – 58.4V
• Operating Temperature: N/A
• Net Weight: N/A
• Size: N/A

Product Usage Instructions

Initial Use Guidelines:

When using the battery for the first time, follow these steps:

1. Fully charge the battery before use.
2. Avoid exposure to water or rain.
3. Avoid charging the battery near fire or extreme heat sources.
4. Avoid using or storing the battery near heat sources like fire or heaters.

Note: If the battery leaks or emits an odor, remove it from the vicinity of an open flame immediately. In case of electrolyte contact with eyes, rinse with water and seek medical help.

Charging Methods:

A. Battery Characteristics & Charging Mode:

The voltage measured during charging or discharging may not accurately represent the actual voltage of LiFePO4 batteries. After disconnecting, the voltage may settle to its true value over time.

To test the real voltage, disconnect all connections and measure after resting for over 30 minutes. The expected true voltage is around 53.6V.

Phase I: CC (Constant Current)
Initially, a discharged battery is charged at a constant current until it reaches a constant voltage point.

Phase II: CV (Constant Voltage)
Battery maintains a constant voltage while current rating drops to 2A.

B. Charging Mode:

Method 1: Battery Charger
Use a dedicated 58.4V LiFePO4 charger for optimal capacity. Recommended voltage: 56.8V to 58.4V Recommended current: – 40A (0.2C): Fully charged in about 5 hours – 50A (0.25C): Fully charged in about 4 hours

Note: – Connect charger before plugging into power outlet. – Disconnect charger when fully charged. – Avoid reversing terminals.

Method 2: Solar Panel and Controller
Solar Panel: – Recommended power: 1200W – A 1200W panel can fully charge in one day (effective power: 4 hours/day). – Duration and intensity of light affect charging efficiency.

Solar Charge Controller: – Recommended mode: 48V (58.4V) – Recommended current: – 40A (0.2C): Fully charged in about 5 hours – 50A (0.25C): Fully charged in about 4 hours

Note: – Manually configure controller with specific parameters for LiFePO4 batteries.

Frequently Asked Questions

Q: Can I charge the battery with a standard lead-acid charger?

A: No, it is recommended to use a dedicated LiFePO4 charger to ensure optimal performance and longevity of the battery.

Q: What should I do if the battery leaks or emits an odor?

A: Remove the battery from any potential ignition sources immediately and handle with care. If in contact with eyes, rinse with water and seek medical attention promptly.

51.2V 100Ah LiFePO4 Battery

Technical Specification

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.

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.

Note
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 53.6V.

Phase I： CC (Constant current)
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.

B. Charging Mode

Method 1: Battery charger
Use a dedicated 58.4V LiFePO4 battery charger to maximize the battery’s capacity.
Recommended charging voltage: 56.8V to 58.4V

Recommended charging current:
The 40A (0.2C) battery will be fully charged to 100% capacity in about 5 hours. The 50A (0.25C) battery will be fully charged to 100% capacity in about 4 hours.

Note

• 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.

Method 2: Solar Panel and Controller

Solar Panel

Recommended power : 1200W
A 1200W solar panel, fully charge in one days (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: 48V (58.4V)

Recommended charging current:
The 40A (0.2C) battery will be fully charged to 100% capacity in about 5 hours.
The 50A (0.25C) battery will be fully charged to 100% capacity in about 4 hours.

Notes
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.

Charging Specs

Discharging Specs

Method 3: Alternator / Inverter
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.

Recommended charging voltage: 56.8V to 58.4V

Recommended charging current:
The 40A (0.2C) battery will be fully charged to 100% capacity in about 5 hours.
The 50A (0.25C) battery will be charged in about 2 hours at 97% state of Charge.

How to Connect (series & parallel)

A. Definition
The battery is connected to the battery with a total input and output cable, and two copper bars are added to multiple connecting cables.

Step 1:
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.

Connect in 2 Parallel

Note
When you connect batteries in series, the voltage increases while the amperage (ampere) remains the same.
For example, if you connect two 51.2V 100Ah batteries in 2 parallel, the battery system’s voltage remains at 51.2V, and the capacity will be 200Ah.

Connect in 4 Parallel

Note
When you connect batteries in parallel, the ampere increases while the voltage remains the same.
For example, if you connect two 51.2V 100Ah batteries in 4 parallel, the battery system’s voltage remains at 51.2V, and the capacity will be 400Ah.

Restrictions
Up to 8 identical batteries connection： 4 in series for 48V (51.2V) & 2 parallel for 400Ah battery systems in total.

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.

B. Balancing Voltage in Parallel Battery Connections:

1. When connecting batteries in parallel, ensure the voltages are equal.
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.

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.

Restrictions
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).

Other Connection Modes

For Extended Storage

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.
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.

Transportation Precautions

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.

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.

Trouble Shooting

Battery has no output

| Tcahbelestirsinlogoosfeo. utput| Properly connect the battery and output cable according to the specs.
Tdheaedb.attery pack is| Charge the battery.
The charger indicator is off| Tvoohlethacghearisgeinnrcoourtrpecutt isritnceorArCecit.put plug| Uansde tphluegcothrreecht acrhgaerrgeinrto toethmeaininsstrouucttlieotnasc.cording

The battery cannot be charged

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inhcaorgrercvt.oltage is

| Coseuhtepcuktwphluegthaenrdthbeatcthearyrger

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Tchaerbgaetdtearlyreiasdfuy.lly| Tnhoermbaltltye.ry can be used

If the problem still exised, because BMS, the protection system has been triggered, you can try the following steps to reactivate it.

Method 1

1. Disconnect the battery from any devices.
2. Wait for 30 minutes, and the battery should return to normal voltage (above 40 volts).

Method 2
If the battery doesn’t recover with Method 1, you can:

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.

Packing List

1. POWERWIN BT5120 51.2V 100Ah Battery
2. M8 screw + plastic cover + screwdriver
3. User Manual

Warranty

Our company provides customers with warranty of 12 months from the date of purchase.

Customer Service

service@iittechnology.com

Made in china

Documents / Resources

| POWERWIN BT5120 51.2V 100Ah LiFePO4 Battery [pdf] User Manual
BT5120, BT5120 51.2V 100Ah LiFePO4 Battery, 51.2V 100Ah LiFePO4 Battery, 100Ah LiFePO4 Battery, LiFePO4 Battery, Battery
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