The EVE MB31 314Ah LiFePO4 Battery Cell is a high-capacity prismatic lithium iron phosphate cell designed for energy storage systems, solar power installations, and battery pack manufacturing. Manufactured by EVE Energy, this cell combines a nominal capacity of 314Ah with a nominal voltage of 3.2V, delivering 1004.8Wh of energy per cell.

Featuring a durable aluminum prismatic casing, high energy capacity, and a specified cycle life of up to 8,000 cycles at 70% State of Health (SOH), the EVE MB31 is suitable for residential solar storage, commercial energy storage, off-grid systems, and custom lithium battery pack projects. Available from BDTronics, it is an option for battery manufacturers, solar system integrators, and energy storage developers in Bangladesh.

Features:

• 314Ah High Capacity: Provides substantial energy storage capacity for large battery pack configurations.

• LiFePO4 Chemistry: Uses lithium iron phosphate chemistry, known for its thermal stability and suitability for stationary energy storage.

• 3.2V Nominal Voltage: Designed for integration into standard 3.2V LiFePO4 battery systems.

• 1004.8Wh Nominal Energy: Each cell provides approximately 1kWh of nominal energy.

• Long Cycle Life: EVE specifies 8,000 cycles at 25°C until the cell reaches 70% SOH under the specified test conditions.

• Prismatic Aluminum Casing: Compact rectangular cell construction for organized battery pack assembly.

• High-Capacity Energy Storage: Suitable for solar energy storage, backup power, and industrial battery systems.

• Low Internal Resistance: Specified initial AC internal resistance of 0.18mΩ ± 0.05mΩ.

• Wide Operating Temperature Range: Supports charging from 0°C to 60°C and discharging from -30°C to 60°C under the specified operating conditions.

• Battery Pack Integration: Suitable for series and parallel configurations when assembled with appropriate battery management and protection systems.

Specifications:

General Information

• Brand: EVE Energy

• Model: MB31

• Battery Chemistry: Lithium Iron Phosphate (LiFePO4 / LFP)

• Cell Type: Prismatic Rechargeable Lithium-Ion Cell

• Nominal Capacity: 314Ah

• Nominal Energy: 1004.8Wh

• Nominal Voltage: 3.2V

Voltage Specifications

• End-of-Charge Voltage: 3.65V

• End-of-Discharge Voltage: 2.5V at temperatures above 0°C

• End-of-Discharge Voltage: 2.0V at temperatures of 0°C or below

• Absolute Minimum Discharge Voltage: 1.8V (protection limit specified by EVE)

Charging Specifications

• Standard Charging Power: 0.5P

• Maximum Continuous Charging Power: 0.5P

• Standard Charging Temperature: 25°C ± 2°C

• Standard Charging Voltage: 3.65V

• Maximum Absolute Charging Voltage: 3.8V

• Charging Temperature Range: 0°C to 60°C

• Standard Charging Mode: Constant power charging to 3.65V, specified at 502.4W

Discharging Specifications

• Standard Discharging Power: 0.5P

• Maximum Continuous Discharging Power: 0.5P

• Standard Discharging Temperature: 25°C ± 2°C

• Standard Discharging Cut-Off Voltage: 2.5V above 0°C

• Low-Temperature Discharge Cut-Off: 2.0V at 0°C or below

• Discharging Temperature Range: -30°C to 60°C

• Maximum Absolute Discharging Temperature: -35°C to 65°C

Electrical Characteristics

• Initial AC Internal Resistance: 0.18mΩ ± 0.05mΩ

• AC Resistance Test Frequency: 1kHz

• Standard Charging/Discharging Rate: 0.5P

• Maximum Continuous Charging/Discharging Rate: 0.5P

Cycle Life and Storage

• Specified Cycle Life: 8,000 cycles

• End-of-Life Capacity: 70% SOH

• Cycle Test Temperature: 25°C

• Storage at 50% SOC: 25°C for 28 days, with specified discharge energy recovery of at least 98%

• Long-Term Storage: 0°C to 35°C for up to 1 year

• Short-Term Storage: -20°C to 45°C for up to 1 month

• Self-Discharge: ≤3.5% per month during the first month and ≤3.0% per month thereafter under specified conditions

Physical Specifications

• Weight: 5,600g ± 300g

• Height with Terminals: 207.2 ± 0.5mm

• Height without Terminals: 204.6 ± 0.5mm

• Width: 173.7 ± 0.5mm

• Thickness: 71.7 ± 0.8mm

• Terminal Center Distance: 123.0 ± 0.3mm

• Cell Construction: Prismatic aluminum casing

Applications:

• Residential solar energy storage systems

• Off-grid solar power systems

• Hybrid solar inverter battery banks

• Commercial and industrial energy storage

• 48V and other custom LiFePO4 battery packs

• Telecom backup power systems

• Renewable energy storage projects

• Battery pack manufacturing and integration

Battery Pack Configuration:

The EVE MB31 314Ah cell can be assembled into different battery configurations depending on the required system voltage and energy capacity.

• 4S Configuration: 12.8V nominal, approximately 4.02kWh

• 8S Configuration: 25.6V nominal, approximately 8.04kWh

• 16S Configuration: 51.2V nominal, approximately 16.08kWh

These are nominal values calculated from the cell specifications. Actual usable energy depends on the BMS settings, operating limits, and system design.

Important Installation and Safety Notes:

• Use a compatible LiFePO4 Battery Management System (BMS) with appropriate voltage, current, temperature, and protection settings.

• Never exceed EVE's specified charging and discharging voltage limits.

• Do not charge the cell below 0°C or above 60°C.

• Use properly rated busbars, terminals, cables, and electrical protection.

• Ensure correct cell compression and mechanical support according to EVE's application requirements.

• Match cells appropriately before assembling series or parallel battery packs.

• Avoid short circuits, reverse polarity, overcharging, and excessive mechanical pressure.

• Follow EVE's official product specification and application conditions when designing battery packs.

Why Choose EVE MB31 from BDTronics?

The EVE MB31 offers 314Ah capacity and approximately 1kWh of nominal energy per cell, making it suitable for large-capacity solar battery storage and custom LiFePO4 battery pack projects. BDTronics supplies battery components for solar energy systems, power electronics, and DIY energy storage applications in Bangladesh.

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