12V200AH LiFePO4 Battery Pack

 Model

DFD12V200Ah

Pack

 Battery material

Iron phosphate

 Combination method

20 PCS

 Maximum capacity （0.1C）

200 Ah

 Minimal capacity（0.2C）

200 Ah

 Nominal voltage

12V

 Max. charge voltage

14.6V

 Discharge cut-off voltage

9.2V

 Max Charge current

50A

 Max Working current

100A

 Standard charge current

30A

 Standard discharge current

50A

 Pack Impedance standard

≤ 3.5 mWW

 Max. dimension（L×W×H）(mm)

447*165*207mm

Box material

ABS

Waterproof grade

IP65

Weight (Approx.)

16.2 kg

Operating temperature

Storage temperature：

~30℃～60℃

Charge temperature

~10℃～55℃

Discharge temperature

-20℃～55℃

Power management system

Single overcharge protection value: minimum/normal/maximum

3.7 /3.75 /3.78 V

Single overcharge protection corresponding delay:

500/1000/1500 ms

Single overcharge release value: minimum/normal/maximum

3.4 /3.55 /3.6 V

Single over discharge protection voltage: minimum/normal/maximum

2.1 / 2.2 / 2.28 V

Corresponding delay of over discharge protection:

500/1000/1500 ms

Corresponding release voltage for single over discharge protection:

2.6 / 2.7 / 2.8V

Overdischarge protection release conditions:

Disconnect load/resume charging

Charging overcurrent protection value:minimum/normal/maximum

90/ 120/ 150 A

Delay corresponding to charging overcurrent protection:

500/ 1000/ 1500 ms

Discharge overcurrent protection: minimum/standard/maximum

180/240/300A

Corresponding delay time of discharge overcurrent protection: minimum/standard/maximum

100/250/400ms

Overcurrent protection recovery conditions:

Disconnect load/resume charging

Short circuit protection current: minimum/standard/maximum

700/900/1100

Short circuit protection delay: minimum/standard/maximum

200/500/800ms

Overcurrent/short circuit protection recovery conditions

Disconnect load/resume charging

Protect
Function

Charging high temperature protection: minimum/standard/maximum

65/70/75℃

Charging temperature release

40/ 50/ 60 ℃

Discharge high temperature protection: minimum/standard/maximum

65/70/75℃

Discharge protection release temperature

40/ 50/ 60 ℃

Discharge protection release conditions

Disconnect load/resume charging

Single equalizing function turn-on voltage：minimum/standard/maximum

3.45/3.5/3.55V

Equilibrium corresponding current ma

10 / 225/ 250 ma

Overcharge
Function
Explain

Overcharge protection refers to when any one of the four strings of batteries is higher than the overcharge voltage setting and the duration reaches the single overcharge delay. The protection board system enters overcharge protection.

3.7/500MS
3.75/1000MS
3.8 V/1500MS

Release condition: The voltage of all single batteries reaches below the overcharge recovery value of single batteries, and discharge can also be released.

Overdischarge
Function
Explain

Any one of the four strings of batteries is lower than the set value of unit voltage overvoltage, and the time reaches the unit overvoltage delay. The protection board will turn off the mos and cannot discharge the battery

2.3V/1500ms
2.2v/1000ms
2.1V/500ms

Release condition: Charging the battery pack can release the battery from the over discharge state.

Item

Test method

Acceptance criteria

3.1 Low temperature discharge capacity

After the battery is charged according to the method specified in 7, it is stored at-10℃±2℃for 16h-24h, and then discharged at-10℃ ±2℃at 0.1C to the termination voltage.

Discharge capacity/nominal capacity ×100%
0.1C≥75%

3.2 High temperature discharge capacity

After the battery was charged according to the method specified in 7, it was stored at 55℃±2℃ for 5h, and then discharged at 0.2C to the termination voltage at 55℃±2℃.

0.2C≥99%

3.3Multiplicity performance

After the battery is charged according to the method specified in 7, it is allowed to stand at 20℃±5℃ for 1h-4h, and then discharged at 0.2C/1C/ at 20℃±5℃ to the termination voltage.

0.2C≥100%
1C≥97%

3.4 Charge retention recovery ability

After the battery was charged according to the method specified in 7, it was stored at 25℃±2℃ for 28 days, and then discharged to the termination voltage at 0.2C. The discharged battery is charged according to the method specified in 6.1 within 24h, then stored at 25℃±2℃ for 1h-4h, and then discharged at 0.2C to the termination voltage.

0.2C≥99%

3.5 Charge retention restores the storage performance.

After the battery was charged according to the method specified in 7, it was discharged at 0.2C for 60 minutes at 25℃±2℃ and then stored at 25℃±2℃ for 90 days. Charge the battery according to the method in 4.1, leave it for 1h-4h, and then discharge it at 0.2C to the termination voltage at 25℃±2℃. Charge and discharge cycles are allowed for 5 times.

0.2C≥99%

3.6 Cycle life

After charging the battery pack according to the method specified in 7, let it stand for 30 minutes, then discharge it at a constant current of 0.2C to the discharge termination voltage, and let it stand for 10 minutes; Cycle according to the above method.

After 2000 weeks, the battery capacity shall not be less than 70% of the initial capacity.

Item

Test method

Acceptance criteria

Temperature cycle

After the vibration battery is fully charged, perform a temperature cycle (- 10℃ - 75℃) in a forced ventilation box according to the following steps.
Step 1: Store the battery at 62℃±2℃ for 4 hours.
Step 2: Reduce the temperature to 20℃±5℃within 30 minutes and hold for 2 hours.
Step 3: Reduce the temperature to - 10℃±2℃ within 30 minutes and hold for 4 hours.
Step 4: Increase the temperature to 20℃±5℃ within 30 minutes and maintain it for at least 2 hours.
Step 5: Repeat the above step for 4 cycles.
Step 6: After the fifth cycle, store for 7 days.

No leakage
No fire
No explosion

Vibrate

After the battery is fully charged, confirm that the battery voltage is fully charged, and then fix the battery on a vibration table. Apply a simple harmonic vibration with an amplitude of 0.76mm, resulting in a total maximum deviation of 1.52mm. The battery vibrates back and forth at a frequency of 10HZ-55HZ-10HZ at a rate of 1Hz for a total time of 90 ± 5min. The battery is vibrated once in three vertical installation positions (in the vibration direction). After the test is completed, leave it for 1 hour.

No leakage
No fire
No explosion

low pressure

After the battery is fully charged, place it in a vacuum box at 20 ℃± 5 ℃. Gradually reduce the pressure of the vacuum tank to 11.6 kPa and hold for 6 hours.

No leakage
No fire
No explosion

Item

Test method

Acceptance criteria

External short circuit

A fully charged battery is placed in an environment of 20℃± 5℃, and the positive and negative terminals are directly shorted for 10 minutes using a wire with a resistance not exceeding 5 mΩ.

No explosion
No fire

Free fall

The fully charged battery fell freely from a height of 1.0m onto the cement floor three times, with random directions.

No explosion
No fire

Mechanical shock

Fix the fully charged battery on the testing machine for impact testing. The battery is subjected to three equal shocks, one in each perpendicular direction. At least one of these directions should be perpendicular to the largest plane of the battery. Acceleration method for battery to withstand impact: within the initial 3ms, the minimum average acceleration is between 75gn and 175gn. The battery shall be tested at an ambient temperature of 20°C ± 5°C.

No explosion
No fire

Heat

Place the fully charged battery in an air circulation oven, with the oven temperature rising from 5 ℃/min ± 2℃/min to 100℃ ± 2℃, and keep it at this temperature for 10 minutes.

No explosion
No fire

Crimp

Place the fully charged battery at 20℃±5℃;
Extrusion direction: Apply pressure perpendicular to the direction of the battery plate;
Extrusion head area: not less than 20cm2;
Degree of squeezing: until the battery housing cracks or internal short circuit occurs (battery voltage is 0).

No explosion
No fire

Overcharge

The battery is discharged at 0.5C to the termination voltage, and then charged with a 16V charger at 0.2C for 12.5 hours.

No explosion
No fire

Overdischarge

The battery is discharged at a current of 0.2C under an environment of 20℃±5℃ (if there is an electronic protection circuit, the discharge electronic protection circuit should be temporarily removed) until the voltage of a single battery reaches 0V.

No explosion
No fire

Armature

Use φ3mm-φAn 8mm high-temperature resistant steel needle runs through the battery at a speed of 10 mm/s to 40 mm/s in a direction perpendicular to the battery (the steel needle stays in the battery).

No explosion
No fire