EPEVER LiFePO4 (LFP) Battery Product Manual

1. Important Safety Instructions

Thank you for choosing EPEVER Lithium Iron Phosphate (LFP) battery. Please read this manual carefully before using this product.

It is strictly forbidden to install this product in harsh environments such as moisture, salt spray, corrosion, greasy, flammable and explosive, or a large amount of dust accumulation.

Please keep this product manual for future reference.

Precautions for work and storage

• Keep the battery in a cool, dry place, free of corrosive, explosive, and insulation-damaging gases or conductive dust. Keep away from fire, heat sources, and high pressure. Do not immerse the battery in water. Keep out of reach of children. Pay attention to anti-static electricity, as it can damage the battery protection circuit.
• The battery must be safely fixed in a reasonable environment, with connectors reliably connected to avoid contact friction causing arc and sparks.
• Handle the battery gently to avoid mechanical vibration, collision, and pressure shock, which could cause internal short circuits, leading to high temperature and fire.
• Do not short-circuit the positive and negative poles of the battery. Do not disassemble or assemble the battery.
• Keep the battery in a semi-charged state (40%~80% SOC is appropriate). Wrap the battery with non-conductive materials to avoid direct metal contact that could cause damage.
• Dispose of waste batteries safely and properly; do not put them into fire or liquid.
• This battery cannot be used in series.

Danger warning

• It is strictly forbidden to crush, drop, collide, puncture, burn, or subject the battery to other destructive behaviors.
• Disassembly and assembly are forbidden. Improper procedures may damage the protective function, leading to deformation, heating, smoke, or combustion.
• Short-circuiting the battery is forbidden. Do not connect positive and negative electrodes with conductive materials. Do not store or transport the battery with conductors to avoid damage.
• Heating and incinerating batteries are forbidden, as it may melt components, cause loss of safety features, or burn electrolyte, leading to deformation, heat, smoke, or fire.

Emergency treatment method

• If electrolyte leaks, avoid skin and eye contact. In case of contact, wash immediately with plenty of water and seek medical attention. Do not allow anyone or any animal to swallow any part of the battery or its contents.
• If the battery is seriously deformed or leaks electrolyte due to collision/extrusion, place it in an explosion-proof box or an open area, and evacuate personnel if conditions permit.
• If the battery catches fire during use or storage, use a high-pressure water cannon to extinguish the fire, ensuring personal safety.
• If the battery catches fire during charging, turn off the charger as soon as possible before proceeding with fire extinguishing.

2. General Information

2.1 Appearance

Front View: The front of the battery unit features an LCD color screen labeled 'A'. Below the screen, there is a blue band indicating 'Solid-State'.

Side Views: The sides of the battery unit show various terminals and controls. Components are labeled:

• B & I: Metal handle
• C, K: Negative connector
• D, L: Positive connector
• E: Inverter communication interface
• F, N: Parallel communication interface
• G: Weak-current switch
• H: Wall mounting bracket
• J: Grounding screw interface
• M: PC upper computer communication interface
• O: Pressure reducing valve

2.2 Product size

The battery unit has approximate dimensions of 531mm (Length) x 160mm (Width) x 525mm (Height). Diagrams detail the specific dimensions and mounting bracket hole spacing for installation.

3. Basic Information

3.1 Interface definition

RS232 Communication (RJ11): Used to connect the upper computer of the lithium battery PC.

CAN/RS485 Communication (RJ45): Used for communication between the lithium battery and the inverter host.

DIP Communication (RJ45): Used for parallel communication between lithium battery and parallel machine.

BMS Communication (RJ45): Used for communication between lithium battery and lithium battery parallel machine.

3.2 Product features

• Single voltage and overall voltage detection, with over-voltage and under-voltage alarm and protection.
• Charge and discharge current detection, alarm, and protection.
• Cell, environment, and PCB temperature detection, with alarm and protection for high and low temperatures during charging and discharging.
• Output short circuit detection and protection.
• Battery SOC calculation and charge/discharge cycle calculation functions.
• Charge balancing function to reduce the charging current of high-voltage cells (current is set by BMS).
• LED indicator function displays current battery SOC, fault status, operating status, etc.
• BMS manual and automatic sleep functions.
• Charge current limiting function.
• History storage function (capacity not less than 500).
• RS485 communication function for real-time monitoring of BMS and battery status.
• Two-stage over-current protection for discharge, offering different response speeds to protect the battery more reliably.

3.3 LCD color display

Interface Introduction:

• Main state page: Displays battery status (e.g., 'Idle'), State, Voltage, Current, and an option for 'Parallel Data'.
• Parallel Data page: Shows detailed parallel data, including pack number, voltage, current, and information.

Icon Introduction:

• Main Menu Icon (Grid symbol): Tap to enter the main menu HOME interface.
• Main State Icon (Battery symbol): Click to enter the Main State interface.
• Parallel Data Icon (Battery with connection lines): Click to enter the Parallel Data page.

HOME page: Displays "(BMS) Smart Battery Management System" with navigation options: PACK_INFO, STATUS, PROTOCOL, SYSTEM.

The menu structure details various parameters and settings accessible through the LCD, including SOC, Current, Voltage, BMS INFO, Warranty, Parallel Data, PACK Info (Voltage, Temperature), BMS Status (Warning, Protect, Fault, Record), and PROTOCOL (CAN, RS485) with a list of supported communication protocols.

4. Instructions

4.1 Packing list

Before unpacking, inspect the battery and packaging for damage. After unpacking, verify all components are present according to the packaging information. Contact the after-sales service center for any questions or issues.

• Lithium battery (x1)
• Wall mounting bracket (x1)
• Wall mounting block 1 (x2)
• Wall mounting block 2 (x2)
• Positive output power cable (1500mm) (x1)
• Negative output power cable (1500mm) (x1)
• Positive connector quick plug (x1)
• Negative connector quick plug (x1)
• Battery pack parallel communication cable (x1)
• RS485 communication cable (1500mm) (x1)
• USB-A to RS232 communication cable (x1)
• M8×60 expansion bolt (x4)
• M8×12 bolt group (x2)
• M6×14 bolt group (x17)
• RNB22-8 wiring terminal (x2)

4.2 Installation requirements

a. Space installation distance

Ensure adequate clearance for ventilation and access: minimum 500mm above and below the battery, and minimum 300mm on the sides. For multiple battery installations, the left and right distance between packs is recommended to be minimized. Diagrams illustrate these clearance requirements.

b. Installation environment

• The battery operates best between 20°C and 40°C.
• Avoid installation in environments with direct high temperature and rain.
• Avoid installation near high-temperature heat sources or low-temperature cold sources.
• Avoid installation in places where ambient temperature changes drastically.
• Avoid installation in areas with strong interference.
• Avoid installation in places accessible to children.
• Avoid installation in areas where water is likely to accumulate.
• It is forbidden to place flammable and explosive materials around the equipment.

c. Prepare tools

The following tools are recommended for installation:

• Hammer Drill
• Rubber Hammer
• Claw Safety Hammer
• Insulated Cross Screwdriver
• Insulated Slotted Screwdriver
• Spirit Level
• Tape Ruler
• Insulation Tape
• Dustproof Cover
• Protective Glasses
• Utility Knife
• Wire Stripper
• Diagonal Pliers
• MC4 Crimper
• Multimeter
• AC/DC Clamp-On Ammeter
• Marker Pen
• Electric Screwdriver

d. Mounting steps

1. Position the mounting bracket against the wall, ensure it is level, mark the screw hole positions with a marker, and then remove the bracket.
2. Use a hammer drill to create holes in the wall (10mm diameter, 65mm depth). Insert the M8 expansion screws and tighten them securely.
3. Lift the lithium battery vertically and align it with the slots on the wall mounting bracket.
4. Push the lithium battery horizontally into the slot of the wall mounting bracket.
5. Slowly release the battery, allowing it to snap into place within the wall mounting bracket.

4.3 Charging operation

1. Check before charging: Inspect the battery and connected equipment (inverter, etc.) for appearance. Ensure the power cord and all wiring harnesses are connected correctly. Verify that the power supply meets the battery's specification requirements.
2. Turn off the inverter or other connected equipment. Connect the positive and negative terminals of the battery correctly and connect the communication cable. Warning: Before connecting the battery, ensure that the positive and negative terminals are connected correctly. Do not reverse connect.
3. Connect the charger to the power supply and turn on the charger.
4. Start the battery. The POWER indicator should be on, and the SOC indicator should flash, indicating normal charging has begun.
5. Standard Charging: Initially, charge the battery to 57.6V with a constant current of 20A (0.2C), then continue charging at 5A (0.05C) with a constant voltage of 57.6V.

Note: All tests mentioned in this document are performed at 25±2°C.

4.4 Discharge operation

1. Before discharging, ensure the load and equipment are turned off.
2. Properly connect the positive and negative terminals of the battery to the load/inverter or other equipment. Warning: Before connecting the load and equipment, please confirm the positive and negative wiring of the battery and prohibit reverse connection.
3. Turn on the load/inverter or other device.
4. Start the battery. The POWER indicator should be steady on, and the RUN indicator should be on for 0.5 seconds, after which discharge begins for 1.5 seconds.
5. Standard discharge: After standard charging, discharge the battery with a constant current of 20A (0.2C) until the battery voltage drops to 41.6V.

Note: All tests mentioned in this document are performed at 25±2°C.

Precautions for charging and discharging operation:

• When the temperature is high (≥35°C) in summer, the battery should not be charged at more than 0.5C during the day. It is recommended to allow a rest period of more than 30 minutes between charge-discharge conversions to avoid frequent use in high-temperature environments, which can affect battery life.
• When the temperature is low (<0°C) in winter, limit the depth of battery discharge to <70% to prevent over-discharge caused by low temperatures, which can affect battery life.

Warning: This lithium battery should only be used with a manufacturer or manufacturer-matched compatible inverter or other equipment. If the lithium battery does not communicate with the inverter or other equipment, it is forbidden to use the lithium battery.

4.5 Description of battery parallel capacity and voltage

5. Protection Features

This section details the protection features of the battery, including parameters for various protection scenarios:

Note: Unless otherwise specified, the above parameters are tested at 25°C ambient temperature.

6. Specifications

Notes:

• ① Repeat the operation method of standard charging and standard discharge 3 times, and take the third result as the initial capacity of the battery.
• ② When the battery is stored for more than 3 months, the storage voltage should be maintained at 52~53.6V.
• ③ For long-term storage, charge at least once every 3 months (no less than 30 minutes@0.2C).

7. Precautions

7.1 Maintenance precautions

Warning

• If you find any problems that may affect the battery or the battery and energy storage system, please contact the after-sales service department; disassembly is strictly prohibited.
• If you find that the copper wire inside the conductive wire is exposed, please strictly prohibit touching it due to the danger of high voltage. Please contact the after-sales personnel; disassembly is strictly prohibited.
• If there are other emergencies, please contact the after-sales personnel first, operate under the guidance of the after-sales personnel, or wait for the after-sales personnel to operate on site.

8. Disclaimers

The warranty does not apply to the following conditions:

• Damage caused by improper use or inappropriate environments (It is strictly forbidden to install the Energy Storage System in humid, salt spray, corrosive, greasy, flammable, explosive, dust accumulative, or other harsh environments).
• The actual current/voltage/power exceeds the limit value of the Energy Storage System.
• Damage caused by working temperature exceeding the rated temperature range.
• Electric arc, fire, explosion, and other accidents caused by failure to follow the Energy Storage System labels or manual instructions.
• Unauthorized disassembly and maintenance of the Energy Storage System.
• Damage caused by force majeure such as lightning strikes, rainstorms, mountain torrents, and Utility failures.
• Damage occurred during transportation or loading/unloading of the Energy Storage System.

Any changes without prior notice! Version number: V1.0