7.4V 2S 18650 Lithium Battery Protection Board Double String Protection Chip 8.4V Overcurrent Overshoot 4AItem NO.: MK00842

2S 18650 Lithium Battery Protection Board

Product Features:

(1) Built-in high-precision voltage detection circuit;

(2) The terminals connected to the charger use high-voltage devices;

(3) Built-in three-stage overcurrent detection circuit (overcurrent 1, overcurrent 2, load short circuit);

(4) The charge and discharge of the battery can be controlled through the MOS tube;

(5) Wide operating temperature range: -40°C ~ +85°C;

(6) Low current consumption.

Wiring Method:

● B+ is connected to the positive pole of the battery;

● MB is connected to the contacts in battery 1 and battery 2;

● B－ Connect to the negative pole of the battery;

● P+ is connected to the positive pole of the charging/discharging terminal (the charging terminal and the discharging terminal are shared);

● P- is connected to the negative pole of the charging/discharging terminal (the charging terminal and the discharging terminal are shared).

Product Specifications:

1. Charging voltage: DC 9V CC/CV (Max: 12V)

2. Current:

Single current consumption (consumption): ≤6ua

Maximum continuous discharge current: 4a

3. Overcharge protection:

Overcharge detection voltage: 4.29v accuracy≤±0.025v

Overcharge detection delay time: 1 second

Overcharge recovery voltage: 4.05v accuracy≤±0.025v

4. Over-discharge protection:

Over-discharge detection voltage: 3v accuracy≤±0.1v

Overdischarge detection delay time: 128ms

Over-discharge recovery voltage: 3.2v accuracy≤±0.1v

5. Overcurrent protection:

Overcurrent detection voltage: 200mv

Overcurrent detection current: 9.8a

Overcurrent delay time: 12ms

Recovery status: automatic recovery

6. Short circuit protection:

Detection status: external short circuit

Detection time: ≤50us

Recovery status: automatic recovery

7. Internal resistance: protection circuit: (mosfet) ≤ 21m

8. Temperature:

Operating temperature range: 40°C ~ 80°C

Storage temperature range: 40°C ~ 125°C

Product size: 3.50×1.70cm / 1.38"×0.67"

Precautions:

1. Please pay attention to the use conditions of input and output voltage and load current, so that the power consumption in the protection board does not exceed the allowable power consumption of the specification;

2. When the battery is connected, it may happen that the battery cannot be discharged. In this case, the connection and charging can return to the normal working state;

3. When the overcharged battery and the overdischarged battery are mixed together, it becomes the state of charge and the state of overdischarge, and it is impossible to charge and discharge;

4. Although the protection board has built-in anti-static protection circuit, please do not apply excessive static electricity to the protection board that exceeds the circuit performance of the protection board.

Scope Of Application:

● 2 strings of nickel cobalt manganese lithium, ternary lithium, lithium cobalt oxide, lithium manganate ion rechargeable battery packs;

● 2 strings lithium polymer rechargeable battery pack