2Pcs 3S 11.1V 12V 12.6V 40A with Balance 18650 Li-ion Lithium Battery Protection Board PCB BMS Charger Protection Circuit Balance Charging Module for Drill Motor Motorcycle Battery
Massager battery pack, LED light backup power supply, 12V electronic products,
solar street light battery pack, monitoring backup power supply, and other
products. Attention: For products with a discharge current of 3A or higher,
the battery discharge rate should be above 3C. Calculation formula for
multiplication: For a 1C multiplication rate battery, the 2000 capacity is
equal to 2AH  1=2A working current. A 3C rate battery with a capacity of 2000
is equivalent to a working current of 2AH  3=6A. When the battery heats up
during use, it means that the battery rate is not suitable. In this case, it
must not be used for a long time as the battery will quickly damage. Attention
1: Strictly follow the diagram to wire 0V (B -), 3.7V (B1), 7.4V (B2), 11.1V
(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 three sets of batteries in series, please ensure that the voltage
of each set of batteries is the same. If it is different, please fully charge
each set of batteries separately before using them in series. The group of
batteries with a fast voltage drop during discharge testing is a poor battery.
For some customers with poor electronic foundations, it is important not to
mix good and poor batteries together! The closer the capacity/internal
resistance of 3 sets of batteries is, the better! (2 good batteries+1 poor
battery usage effect=3 poor battery usage effect). Attention: Do not mix the
good battery and poor battery to use. The internal resistance of 3 battery
capacity are closer will be better. Please buyers know the professional
knowledge of this module before buying. The properties of the lithium battery
protection board: Overcharge voltage range: 4.25-4.35v ± 0.05v Size: 41  60 
4.0mm Overdischarge voltage range: 2.3-3.0v ± 0.05v Working current: 0-25A
Working temperature: -40-- -+50 ℃ Instantaneous current: 35-40A Storage
conditions: -40--+80 ℃ Static current: less than 30uA Effective life: greater
than 30000 hours Internal resistance: less than 100m Ω Short circuit
protection: Protectable, delayed self recovery.
 
Product Features
  

         
Balanced version charging: refers to the unbalanced voltage of the battery terminals due to the individual differences and temperature differences of the battery during the use of the battery. The battery is activated and charged to balance the characteristics of each battery in the battery pack and prolong the battery life.
         
Charging voltage: DC 12.6V~13.6V
         
Continuous discharge current: maximum 40A (if the heat dissipation environment is not good, please reduce the load current);Continuous charging current: maximum 20A.
         
Support overcharge protection,overdischarge protection,overcurrent protection and short circuit protection.
         
The protection board is suitable for lithium-ion batteries, and can also be used for ternary batteries, manganese acid batteries, and cobalt acid batteries.