Solar Lithium Battery LFP 12V 75AH

1

Rated Capacity

75Ah

The capacity after charging at 0.2C and then discharging to 10V at 0.2C under a temperature of 25±2℃

Min Capacity

72Ah

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

15A (0.2C)

Maximum charging current 15 A(0.2C)

6

Standard Discharging Current

15A (0.2C)

Maximum discharging current 15 A (0.2C)

7

Condition to stop charging

≤0.05C

8

Using temperature

Charge 0~55℃

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℃

1

Visual inspection

No protrusions, discoloration, deformation, or damage

Visual inspection

2

Size

212.5*188.4*193mm

Use a caliper (precision 0.01mm)

3

Weight

≤7 kg（No sheet metal）

Use an electronic scale (with a precision of 0.1g)

4

Internal resistance

< 20mΩ  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 ≤3.75A). 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%

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±0.06V（<0.3s）

6

Overcharge Release Protection Voltage：14.2±0.14V

7

Over-discharge protection voltage：10.0±0.16V (<0.3s)

8

Over-discharge Protection Voltage Release：11.2±0.16V

9

First-level over-current discharge protection：33.7-47A,Typical value 40A(<650ms)

10

Second-level over-current discharge protection：67.4-94A,Typical value 80A(<82ms)

11

Over-current Charging Protection：27-33A,Typical value 30A(<325ms)

12

Discharge Temperature Protection：High temp≥65±3℃；Low temp≤-20±3℃

13

Charging Temperature Protection：High temp≥55±3℃；Low temp≤-5±3℃

14

Circuit Static Current（work mode）：≤6uA

15

Circuit Static Current (Sleep Mode)：≤0.3uA