21115 LiFePO4 Battery Cell (3.2V 24Ah)

21115 Battery Cell is lightweight prismatic aluminum shell lithium battery that uses lithium iron phosphate material and is made by lamination process. This battery cell is a power battery, supports continuous 1C charging and 3C discharge. The cycle life exceeds 3,000 times. We can also customize battery packs of various sizes and performances according to your needs.

  • Model: 21115-24Ah
  • Product Dimensions: 21x115x133mm
  • Weight: 515g
  • Cathode Material: LFP
  • Nominal Voltage: 3.2V
  • Nominal Capacity: 24Ah
  • Cut-off Discharge Voltage: 2.5V
  • Maximum Charge Voltage: 3.65V
  • Maximum Discharge Rate: 3C
  • Charging Method: CC/CV
  • Cycle Life: >3000
  • Operating Temperature: Charging 0°C to 55°C; Discharging -20°C to 60°C
  • Application Range: LEV, Golf cart, Residential ESS, AGV, Industrial applications, etc.
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Product details

  • Anode: Double rivet pressing design, patented micro-tooth copper-aluminum composite structure, stable and easy to process; High precision extrusion and cold drawing process, low cost.
  • Cathode: High efficient integrated design with patented negative pressure sealing structure; Side welding laser sealing process, high welding yield and low laser welding leakage rate;
  • Safety Valve: Ensure cells internal pressure released out to avoid extreme if needed.
  • Lamination Process: Cell foil plates with lamination process for low internal resistance and heat dissipation.
    High efficient integrated design, advanced technology and low manufacturing cost.

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FAQ

21115 LiFePO4 battery cells are suitable for battery pack assembly of electric motorcycles, energy storage equipment, power tools and small vehicles, meeting application scenarios with high safety and high performance requirements.

The total voltage of the battery pack is determined by the number of cells in series (the voltage of a single cell is 3.2V), and the total capacity is determined by the number of cells in parallel (the capacity of a single cell is 24Ah). For example, the voltage of a battery pack with 16 series and 3 parallels is 51.2V and the capacity is 72Ah.

Yes, the assembled battery pack must be equipped with a BMS. BMS can monitor the voltage, current, and temperature of the battery in real time, provide protection functions, and ensure the safety and service life of the battery pack.

  • The battery cell should be screened for consistency (capacity, voltage, internal resistance) to ensure balanced performance.
  • Use appropriate welding processes to avoid thermal damage to the battery cell.
  • Configure a BMS that meets the parameters of the assembled battery pack for full protection and battery management.
  • Ensure that the assembly environment is dust-free and dry to avoid moisture in the battery cells.

21115 cells support a maximum discharge rate of 3C. Therefore, the maximum discharge current of the battery pack is 3C. For example, a battery pack with a capacity of 45Ah can have a maximum discharge current of up to 135A.

Yes, the assembled battery pack supports a 1C charge rate. For example, the maximum charge current of a 45Ah battery pack can reach 45A, and the charging speed depends on the configuration of the charger and BMS.

21115 LiFePO4 cells can operate stably in environments as low as -20°C and as high as 60°C. For extreme low temperatures (such as -30°C), an optional heating system can be configured to ensure battery startup performance.

We support battery packs to meet international certification requirements such as UN38.3, CE, UL, IEC62133, and can provide customized certification services according to the target market.

  • Regularly check the BMS operating status to ensure normal protection functions.
  • Charge in time when the power is too low (less than 10%) to avoid deep discharge.
  • When stored for a long time, it is recommended to keep the power at 50%-60% and recharge once every 3 months.
  • The storage environment should avoid high temperature and high humidity and maintain good ventilation.
  • We can provide the following customized services according to customer needs:
  • Adjust the voltage and capacity of the battery pack as needed
  • Integrate intelligent BMS and low-temperature heating system
  • Provide shell design with IP65 or higher protection level
  • Support customers’ OEM/ODM needs and develop solutions suitable for specific application scenarios

LiFePO4 cells support more than 3,000 charge and discharge cycles, and the life of the battery pack can usually reach more than 8 years, depending on the usage conditions and maintenance frequency.

  • High safety: LiFePO4 has stable chemical properties and is resistant to thermal runaway and explosion-proof
  • Long life: The number of cycles exceeds 3,000, which is more than 3 times that of traditional batteries
  • Wide temperature operation: Supports normal operation from -20°C to 60°C
  • Lightweight design: Higher energy density and lighter weight

We accept orders for custom battery packs as low as 50 groups, and the specific quantity can be flexibly adjusted according to project requirements.

Yes. The 21115 battery cell supports 3C discharge rate, and after being assembled into a battery pack, it can meet the use of high-power demand equipment.

Yes, we provide complete battery assembly technical support, including design consultation, BMS configuration suggestions, assembly process guidance and after-sales service to ensure customers get high-quality battery pack solutions.

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