TopBand Litium

The batteries are supplied with a LiFePO4 Battery Management System (BMS)that can monitor and optimized each single prismatic cell during charge & discharge, to protect the battery pack overcharge, over discharge, short circuit. Overall, the BMS helps to ensure safe and accurate running.

• Normal Voltage: 12,8V
• Normal Capacity: 50Ah
• Internal Resistance: ≤20mΩ
• Battery Operation Temperature Range: 0~45°C
• Normal Charge Voltage 14,6V
• Recommended Float Charge Voltage 12,8V
• Max Charge Current: 50A - Battery initial Temp 25°C
• Recommended Charge Current: ≤25A
• Battery Operation Temperature Range: -20~60°C
• Output Voltage Range: 10.0~14.6V
• Allowed Discharge Current: 50A withstand 30min @Battery initial Temp 25±5°C
• Pulse Discharge Current: 150A withstand 3s
• Discharge Cut-Off Voltage: 10.0V

• Dimension: Lenght 196mm, Width 165mm, Height 174mm
• Weight: 6,8kg
•  Storage Temperature & Humidity Range: Short: within one month -20~35°C, 45~75%RH, Long term: above one month: -10~30°C, 45~75%RH
  
• Self-discharge rate: Residual capacity ≤3% per month; ≤15% per year, Reversible capacity: ≤1.5%per month; ≤8% per year

Electrical Characteristics & Test Condition
Testing Conditions: Ambient Temperature: 25±5°C; Huminity:45%~75%.

• Internal Impedance: ≤20mΩ
  Test the internal resistance of 50% SOC battery pack with 1 kHz AC internal resistance test instrument. 
• Capacity: ≥49Ah
  Rest for 1 hour after fully charged, then discharge with 0.33C current until the battery reaches the discharge cutoff voltage. Repeat above process for three times, if the discharge time is not less than 180 minutes, you can stop and define the Discharging current*time value (Ah) as battery capacity.
• MAX charge Current: 50A
  Charging with this current for more than 0.5h and the added temperature of battery pack less than 20°C. 
• MAX discharge Current: 50A
  Discharging with this current for more than 0.5h and the added temperature of battery pack less than 35°C. 
• Cycle life (DOD%100):  ≥2000cycle
  Discharge with the current of 0.5C until it can’t discharge, and then rest it for 1h. Charge the battery following CC(0.33C)/CV(14.6V) mode to full capacity, and then rest it for 1h. Repeat above process until full charged capacity is no more than 80% of normal value. Accumulated times is defined as cycle life. 
• Discharge Temperature Characteristics:  -20°C ≥70%, 0°C ≥80%, 25°C 100%, 55°C ≥95%
  At 25±5°C discharge the battery with the current of 0.33C to the cut-off voltage. Store the battery at various temperatures for 2h and discharge the battery with 0.33C to the cut-off voltage. Record the ratio between discharging & charging capacity. 
• Charge Retention ability: Remain capacity ≥90%
  Charge the battery to full capacity and store it for 28days, and then discharge it with 0.33C to the cut-off voltage.