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LFP 12V 25AH
JIAXIN
Solar Lithium Battery LifePO4 12V25AH Specifications
No | Item | Rated parameters | Remark | |
1 | Rated Capacity | 25Ah | The capacity after charging at 0.2C and then discharging to 10V at 0.2C under a temperature of 25±2℃ | |
Min Capacity | 24Ah | |||
2 | Nominal Voltage | 12.8V | ||
3 | Charging cut-off voltage | 14.6V | Constant Voltage Charging | |
4 | Discharging cut-off voltage | 10V | ||
5 | Standard Charging Current | 5A (0.2C) | Maximum charging current 5 A(0.2C) | |
6 | Standard Discharging Current | 5A (0.2C) | Maximum discharging current10A | |
7 | Condition to stop charging | ≤0.05C | ||
8 | Using temperature | Charge 0~45℃ | Relative humidity 45%~85% | |
Discharge -20~60℃ | ||||
9 | Storage Temp | 3 Months | -20-45℃ | During storage, it should be kept in a clean, dry, and well-ventilated indoor environment where the ambient humidity does not exceed 75%. It should be avoided to come into contact with corrosive substances and kept away from fire sources and heat sources. The battery must be charged and discharged once every 6 months and recharged to 50%~70% of its relative capacity. |
6 Months | -10-25℃ | |||
Discharge method: Discharge at a constant current (0.2C) to the cut-off discharge voltage under 25±2℃。
Charging Method: Charge with constant voltage of 14.6V and constant current of 0.2C, and stop charging when the current is less than 1.25A (at 25±2℃, relative humidity 65%)
4 、Battery Characteristics and Test Conditions
No | Item | Standard | Detection conditions | |
1 | Visual inspection | No protrusions, discoloration, deformation, or damage | Visual inspection | |
2 | Size | 245*176.4*75mm | Use a caliper (precision 0.01mm) | |
3 | Weight | ≤ 3 kg（No sheet metal） | Use an electronic scale (with a precision of 0.1g) | |
4 | Internal resistance | < 30mΩ No hyphens included | Measured within one hour after standard charging using a 1 kHz analog sine wave method at an ambient temperature of 25±2℃ | |
5 | Open-circuit voltage | ≥ 12.8V | Measured after fast charging for 2.5 hours at an ambient temperature of 25±2℃ | |
6 | Cycle life | ≥80%（after 2500 times cycle life） | Under an ambient temperature of 25±2℃, perform 2500 cycles of charge and discharge. Charging voltage/current: 14.6V/0.2C (termination current ≤1.25A). Discharge current: 0.2C (termination voltage 10V). Rest time: 10 minutes. | |
7 | Power retention | ≥ 97% | After standard charging, place it in an ambient temperature of 25±2℃ for 28 days, then calculate the power consumption. | |
8 | Temperature Discharge Characteristics | 55℃ | ≥100% | After standard charging is complete, discharge at the standard discharge current in the corresponding ambient temperature until the termination voltage is reached. |
0℃ | ≥85% | |||
-10℃ | ≥75% | |||
5 、Security features
No | Item | Standard | Detection conditions |
1 | Leakage | No leakage | After standard charging is completed, place it in an environment with ambient temperature of 60±2℃ and relative humidity of 85% for 20 days, then place it in an environment with 25±2℃ for 1 week. |
2 | Overcharge protection | No cracking, sparks, smoking, or leakage | After standard charging is completed, connect a 0.2C/16V constant voltage and constant current power supply to the input terminal for 24 hours in an environment with a temperature of 25±2℃. |
3 | Short-circuit protection | No cracking, sparks, smoking, or leakage | After standard charging is complete, connect the positive and negative terminals of the battery directly with a 100mΩ±10mΩ wire and leave it for 8 hours in an environment with a temperature of 25±2℃. |
4 | Temp cycle | No explosion, fire, smoke emission, or leakage | After standard charging is complete, cool down to -40°C within 60 minutes and maintain that temperature for 90 minutes, then heat up to 25°C within 60 minutes, heat up to 85°C within 90 minutes and maintain that temperature for 110 minutes, then cool down to 25°C within 70 minutes. Observe for 1 hour after 5 cycles. |
5 | Overcharge protection voltage：14.6±0.1V（0.7~1.3s） | ||
6 | Overcharge Release Protection Voltage：13.8±0.2V（11~21ms） | ||
7 | Over-discharge protection voltage：8±0.2V （83~155ms） | ||
8 | Over-discharge Protection Voltage Release：10±0.25V（0.7~1.7ms） | ||
9 | over-current discharge protection（Hardware）：16~24A（6.9~12.9ms） | ||
10 | Over-current Charging Protection（Hardware）：6~16A（5~11ms） | ||
11 | Circuit Static Current（work mode）：≤30uA | ||
