4-String 14.8V Lithium Battery Protection Board 18650 16.8V Overcharge Over Discharge Short Circuit Protection 20AItem NO.: 4S20A

4-String 14.8V Lithium Battery Protection Board

The Described Power Range is Applicable to the Following Products:

Small power inverters, massager battery packs, LED light backup power supplies, electronic products, solar street light battery packs, monitoring backup power supplies, and other products.

Attention: For products with a discharge current above 3A, the battery discharge rate should be above 3C.

Formula for multiplying rate calculation: For a 1C multiplying rate battery, the 2000 capacity is equal to 2AH * 1=2A upper limit working current.

3C rate battery, with a capacity of 2000 equal to 2AH * 3=6A upper limit working current.

If the battery heats up during use, it means that the battery rate is not suitable. This situation cannot be used for a long time, and the battery will be damaged quickly.

Attention 1: Strictly follow the diagram to wire 0V (B -), 3.7V (B1), 7.4V (B2), 11.1V (B3), 14.8V (B+), and do not intentionally short-circuit!

Note 2: After connecting the wires, it is necessary to charge first before there is an output.

Note 3: When connecting four sets of batteries in series, please ensure that the voltage of each set of batteries is the same. If different, please fully charge each set of batteries separately before using them in series. During the discharge test, the battery with a fast voltage drop is considered a poor battery.

Explanation: Do not mix good batteries with poor batteries! The closer the capacity/internal resistance of 4 sets of batteries, the better! (The usage effect of 2 good batteries+2 poor batteries=the usage effect of 4 poor batteries).

The Properties of the Lithium Battery Protection Board:

Model: HX-4S-D20

Overcharge voltage range: 4.25-4.35v ± 0.05v

Size: 35 * 35 * 3.6mm

Overdischarge voltage range: 2.3-3.0v ± 0.05v

Upper limit working current: 10A

Working temperature: -40--+50 ℃

Upper limit instantaneous current: 20A

Storage conditions: -40--+80 ℃

Quiescent current: less than 30uA

Effective life: greater than 50000 hours

Internal resistance: less than 100m Ω

Short circuit protection: Protectable, requires charging and recovery

Charging voltage 16.8V-17V

The size and device description of the protective board; The size of the protective board is 35 * 35 * 3.0mm; The components are S-8254AA protection chip and D403 * 4 pieces