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.

Forbidden Actions:

• Installing this product in harsh environments such as moisture, salt spray, corrosion, greasy conditions, flammable and explosive atmospheres, or areas with 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 from corrosive, explosive, or insulation-damaging gases or conductive dust. Keep away from fire and 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 use environment. Connectors must be 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.
• 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.
• Disassembling or assembling the battery improperly can damage its protective function, leading to deformation, heating, smoke, or combustion.
• Short-circuiting the battery is forbidden. Do not connect the positive and negative electrodes with conductive materials. Do not store or transport the battery with conductors.
• Heating or incinerating batteries is forbidden, as it may melt components, compromise safety features, or burn electrolyte. Overheating can deform, heat, smoke, or burn the battery.

Emergency Treatment Method

• If electrolyte leaks occur, avoid skin and eye contact. In case of contact, wash immediately with plenty of water and seek medical attention. Do not allow any person or 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

The battery unit features several connection points and indicators. The following labels correspond to specific components:

• A: Weak-current switch
• B: Metal handle
• C: Wall mounting bracket
• D: LCD color screen
• E: Positive connector
• F: Pressure reducing valve
• G: Negative connector
• H: PC upper computer communication interface (RJ11)
• I: Inverter communication interface (RJ45)
• J: Parallel communication interface (RJ45)
• K: Parallel communication interface (RJ45)
• L: Grounding screw interface

Visual Description: The battery is a rectangular unit. The front view shows the LCD screen (D) and connection terminals (E, G, L). The side views show the metal handle (B) and the weak-current switch (A). The back view shows the wall mounting bracket (C).

2.2 Product Size

The product dimensions are:

• Height: 600 ± 3 mm
• Width: 470 ± 3 mm
• Depth: 190 ± 2 mm (overall), 160 ± 2 mm (main body)
• Mounting bracket dimensions: 350 mm width, 450 mm height, with specific hole spacing (310 mm width, 6-19 mm and 6-12 mm clearances indicated).

3 Basic Information

3.1 Interface Definition

The battery utilizes various communication interfaces:

RS232/RJ11 Communication Interface:

Used to connect to the lithium battery PC upper computer.

Diagram Description: A standard RJ11 6-pin connector pinout is shown.

CAN/RS485 Communication Interface (RJ45):

Used for communication between the lithium battery and the inverter host.

Diagram Description: A standard RJ45 8-pin connector pinout is shown, indicating signal assignments.

DIP Communication Interface (RJ45):

Used for parallel communication between lithium batteries.

Diagram Description: A standard RJ45 8-pin connector pinout is shown, indicating signal assignments for DIP communication.

BMS Communication Interface (RJ45):

Used for communication connection between lithium battery and lithium battery parallel machine.

Diagram Description: A standard RJ45 8-pin connector pinout is shown, indicating signal assignments for BMS communication.

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 alarms and protection during high and low-temperature charging/discharging.
• Output short circuit detection and protection.
• Battery SOC calculation and charge/discharge cycle calculation functions.
• Charge balancing function to reduce charging current for high-voltage cells.
• LED indicator for current battery SOC, fault status, and operating status.
• BMS manual and automatic sleep function.
• Charge current limiting function.
• History storage function (capacity for over 500 storage entries).
• RS485 communication function for real-time monitoring of BMS and battery status.
• Two-stage over-current protection for discharge with differentiated response speeds for enhanced reliability.

3.3 LCD Color Display

The battery features an LCD color display for monitoring and control.

Interface Introduction:

• Main State Page: Displays overall battery status, including charge level (e.g., 100%), voltage, current, and operational status (e.g., 'normal').
• Parallel Data Page: Shows status for multiple battery packs, including individual pack numbers, voltage, current, and operational status.

Icon Introduction:

• Main Menu Icon: Tap to enter the main menu HOME interface.
• Main State Icon: Click to enter the Main State interface.
• Parallel Data Icon: Click to enter the Parallel Data page.

HOME Page:

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

Menu Structure:

The menu allows access to detailed information and settings:

• Main State Page: SOC (Total), Current, Voltage, BMS INFO, Warranty.
• Parallel Data: SOC (Each), Current, Voltage, BMS Information.
• PACK Info: Voltage (for individual cells, e.g., Cell 01 to Cell 16), Temperature (NT1, NT2, NT3, NT4, Mos-T, ENV-T).
• BMS Status: Warning, Protect, Fault, Record.
• PROTOCOL:
  • CAN: Lists various protocols including GOOD WE PROTOCOL, LV BMS Protocol (CAN) for Solar, Inverter Family EN-V 1.5, PYLON PROTOCOL 2.0, PYLON CAN bus protocol V 2.0.420211122, SMA PROTOCOL, SMAF SS-Connecting Bat-TI-en-20W, GROW ATT-PROTOCOL, Growatt BMS, CAN_Bus-protocol-low-voltage.
  • RS485: Lists protocols such as USER-485-voltron, Voltronic Inverter and BMS 485 communication protocol 20200325, PYLON, RS 485-protocol-pylon-low-voltag, Luxpowertek Battery Protocol RS 485-V 01.
• Language Select: Options include English, Chinese, and Traditional Chinese.
• PACK SN: Serial Number (Bluetooth SN).

Note: Protocol access requires permission password entry on first use. The initial password is 123456. Exiting the agreement interface activates the permission. Re-verification is needed for subsequent modifications.

4 Instructions

4.1 Packing List

Before unpacking, inspect the battery packaging for damage and verify the model. If any abnormality is found, do not open the package and contact the after-sales service center immediately. After unpacking, check if the product is complete according to the packaging information. Contact the after-sales service center for any questions.

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

4.1 Installation Requirements

a. Space Installation Distance

Master and check the performance of all tools and devices to ensure safety before using them.

Visual Description: Diagrams show the battery unit with required clearances. Minimum clearances are indicated:

• Top/Bottom: ≥ 300 mm
• Left/Right: ≥ 500 mm

The document also recommends minimizing the distance between battery packs when installing multiple units side-by-side, with suggested spacing of 300-500 mm between units.

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 locations with drastic ambient temperature changes.
• Avoid installation in strong interference environments.
• Avoid installation in places accessible to children.
• Avoid installation in places 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
• Insulated Tape
• Dustproof Cover (e.g., KN95 mask)
• Protective Glasses
• Utility Knife
• Wire Stripper
• Diagonal Pliers
• MC4 Crimper
• Multimeter
• AC/DC Clamp-On Ammeter
• Marker Pen
• Electric Screwdriver

d. Space Installation Requirements (Mounting Steps)

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

e. Wiring Diagram

The diagram illustrates the connection of multiple batteries in parallel with an inverter.

Cable Descriptions:

• Positive output power cable (1500mm) - typically red
• Negative output power cable (1500mm) - typically black
• RS485 communication cable (1500mm) - typically blue
• Lithium battery positive parallel power cable - typically orange
• Lithium battery negative parallel power cable - typically black
• Lithium battery parallel communication cable (DIP-BMS) (1200mm) - typically green

Precautions for Inverter Connection and Parallel Connection:

Select the correct wiring harness based on the parallel schematic diagram and product appearance.

1. Output Power Cable: Connect the positive connector of the host to the positive terminal of the inverter (red cable). Connect the negative connector of the host to the negative terminal of the inverter (black cable).
2. RS485 Communication Cable: For communication between the host and the inverter. The host's interface is the RS485 port, and the inverter's terminal port is the BMS port.
3. Lithium Battery Parallel Power Cable: Connect the positive connector of the host to the positive connector of the slave (orange cable). Connect the negative connector of the host to the negative connector of the slave (black cable).
4. Lithium Battery Parallel Communication Cable: For communication between the host and the slave. The host's interface is the DIP port, and the slave's interface is the BMS port.

4.3 Charging Operation

Warning: For operational safety and compliance, disconnect the communication and cable link with the inverter when storing the battery. During handling and installation, wear appropriate safety equipment (helmets, goggles, protective shoes) to prevent injury. All wiring must be performed by professionals. Use provided or recommended cables for safe and efficient system operation.

1. Check before charging:
   • Inspect the battery and inverter/connected equipment for proper power cord and wiring harness connections.
   • Ensure the power supply meets the battery's specification requirements.
2. Turn off the inverter or other equipment. Connect the positive and negative terminals of the battery and the communication cable normally.

   Warning: Before connecting the battery, ensure the positive and negative terminals are correctly connected. Do not reverse connect.

3. Connect the charger to the power supply and turn it on.
4. Start the battery. The POWER indicator should be on, and the SOC indicator should flash, indicating normal charging has begun.

Standard Charging:

First, 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 stated in this document are performed at 25±2℃.

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, 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, the RUN indicator should be on for 0.5 seconds, and discharge will start for 1.5 seconds.

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 stated in this document are performed at 25±2℃.

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 let it stand for over 30 minutes during charge-discharge conversion to avoid frequent use in high-temperature environments, which can affect battery life.
• When the temperature is low (<0°C) in winter, the battery discharge depth should be kept below 70% to avoid 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. Do not use the lithium battery if it does not communicate with the inverter or other equipment.

4.5 Description of Battery Parallel Capacity and Voltage

5 Protection Features

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

6 Specifications

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

General Warnings

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

8 Disclaimers

The warranty does not apply to the following conditions:

• Damage caused by improper use or inappropriate environments (e.g., 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.
• Accidents such as electric arc, fire, explosion caused by failure to follow Energy Storage System labels or manual instructions.
• Unauthorized disassembly and maintenance of the Energy Storage System.
• Damage caused by force majeure events such as lightning strikes, rainstorms, mountain torrents, and utility failures.
• Damage that occurred during transportation or loading/unloading of the Energy Storage System.

Any changes without prior notice! Version number: V1.2