Description: BMS Battery Protection Board 3S 40A 

40A 3S BMS Circuit 12V 40A Protection Circuit 12V BMS 40A 11.1V 12.6V 18650 AA AAA Lithium Battery Charger Board 3S 40A BMS Circuit 12V BMS Battery Management System

This is 3S 12V 40A 18650 Lithium Battery Protection Board 11.1V 12.6V High Current With Balanced Circuit Over Charge Over-Discharge Over Current And Short Circuit Protection Function. Board charging and discharging are the same port, the board includes the balanced circuit.

When the charge balance, the board will be a bit warm, even after disconnecting the charger, some are still in the balance, will continue to warm for a while until below the equilibrium break threshold.

The protection board cannot be used for iron lithium polymer battery (for other batteries, no matter what material, as long as the overvoltage and put voltage can be used for cutting), electric finish machinery, electric bicycle batteries, car, and motorcycle starter battery protection.

Applicable to the following products (within rated power):

Electric drill, 775 motors (6A-10A), small power inverter, small power vacuum massager battery, LED lamp, 12V standby power electronic products, 12V120W car washing pump, battery, solar street lamp monitoring standby power supply, and other products.

Rated current can’t over 40A, it can’t exceed 60A per 0.5 seconds.

Specifications:

• Brand new
• Size: about 56mm*45mm*1.2mm
• Overcharge voltage range: 4.25-4.35v + 0.05v.
• Over discharge voltage range: 2.3-2.7v + 0.05v.
• Operating current: 0 – 40A.
• Operating temperature: -40 – +50℃.
• Instantaneous current: 35 – 40A.
• Storage condition: -40 – +80℃.
• Quiescent current: less than 30uA.
• Balance current: about 40 – 50mA.
• Effective life: more than 30000 hours.
• Internal resistance: less than 100m ohm.
• Short-circuit protection: protection, delayed self recovery.
• Short circuit protection: Yes, delayed self recovery

Features:

• High Quality
• Short circuit protection.
• Overcharge protection.
• Over-discharge protection.
• Overcurrent protection.
• Can be applied to various 3.7V lithium core.
• Compact size and lightweight.
• Fine workmanship and durable.
• Ensure the security of battery pack.
• Stable performance.
• Fine workmanship and durable.
• Suitable for:
• 10.8V (Rated voltage of polymer battery)
• 11.1V (18650 or 3.7V lithium battery rated voltage)
• 12.6V (Lithium battery full charge voltage)

Welding point Description:

• B+ : Connect to the battery positive
• B- : Connect to the battery negative
• BM: Connect to the battery 1 and battery 2 joining point
• P+ : Connect to the charge / discharge side of the positive terminal
• P- : Connect to the charge / discharge side of the negative terminal

Precautions:

• Strictly according to the diagram wiring: 0V(B-)3.7V(B1)7.4V(B2)11.1V(B+), Do not deliberately short circuit.
• After the line is connected, Need to charge first, then have output.
• When the battery is connected in series with 3 groups, Please ensure that the voltage of each battery is the same. If not same, please fill in each set of batteries and then use.
• Do not mix the good battery and the battery.
• The capacity of the battery internal resistance is closer will be better.
• 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

Note: Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!

Package Include:

• 1x 40A 3S BMS Circuit 12V 40A Protection Circuit 12V BMS 40A