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4S 40A Li-ion Lithium Battery 18650 Charger PCB BMS Protection Board with Balance For Drill Motor 14.8V 16.8V Lipo Cell Module

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$1.40 / $1.71
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$0.67 / $1.71
Shipping to: United States | Express delivery: 7-12 business days | Standard delivery: 15-25 business days

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Feature:

4 string 16.8V 40A lithium battery protection board (comes with recovery function-AUTO Recovery)
Scope: Nominal voltage of 3.6V, 3.7V lithium battery (including 18650,26650, polymer lithium battery)
Product Size: 45 * 55 * 3.4mm (Standard Edition / Enhanced), 46 * 60 * 3.4mm (balanced version)
Product weight: 9.3g (standard / enhanced version), 10.3g (balanced version)
Charging voltage: 16.8V - 18.1V
Continuous discharge current (upper limit): 40A (if the cooling environment is not good, please reduce the load current use)
Continuous charge current (upper limit): 20A
Equalization version: suitable for starting current below 80A, power 135W below the drill.
ProjectMin.Typ.Max.Units
Consuming current121824uA
Overcharged protection voltage4.24.254.3V
Balanced starting voltage4.174.24.23V
Equilibrium current95100105mA
Balanced heating power1.561.721.91W
Overcharge recovery voltage4.14.154.2V
Over-discharge protection voltage2.42.52.6V
Overvoltage protection after over-discharge protection2.833.2V
Overvoltage protection after over-discharge protection3.23.53.8V
Over-discharge recovery voltage2.93.23.3V
Conduction internal resistance2.533.5mu03a9
Overcurrent protection current C708090A
Overcurrent delay time100150200ms
Continuous operating current04040A
Continuous output power0672672W
Ambient temperature-402585°C

Troubleshooting:
Fault phenomenon Fault check and cause The solution
Unable to charge Measuring the voltage of 4 groups of batteries. when one of the battery voltages exceeds 4.25V, the protection board will activate overcharge protection. Pair the battery pack well, do not mix the good battery and the bad battery.
Unable to discharge Measuring the voltage of 4 groups of batteries. when one of the battery voltages is lower than 2.7V, the protection board will activate the over-discharge protection. Pair the battery pack well, do not mix the good battery and the bad battery.
Charging/discharging failure 0V, 4.2V, 8.4V, 12.6V, 16.8V miswired Rewire or replace the new board (human failure, no warranty)
Overcharge/over-discharge failure 0V, 4.2V, 8.4V, 12.6V, 16.8V miswired Rewire or replace the new board (human failure, no warranty)
Discharge protection Check that the battery pack has sufficient discharge capability and check that the load"s starting current exceeds the over-current protection current of the protection board. Replace the battery pack with a higher discharge capacity, or a protective plate with a larger current (super working range)
Component soldering There is no connection between one of the components and the PCB pad. Repair welding
Component welding There is a short circuit between two or more pins of the component. Remove the component and re-weld
Electrostatic breakdown A In the unpowered state, measure the G, D, and S poles of the MOSFET. If the forward and reverse resistances of any two pins are 0u03a9, it indicates that it has broken down. Remove the replacement MOS tube
Electrostatic breakdown B Remove the MOS tube and measure the resistance of the G and D, G and S poles of the MOS tube. If there is a resistance indicating that it has broken down, the resistance should be infinite.
Remove the replacement MOS tube
Package includes:
1 x Battery Protection Board
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Electronics Ranking

4S 40A Li-ion Lithium Battery 18650 Charger PCB BMS Protection Board with Balance For Drill Motor 14.8V 16.8V Lipo Cell Module

4S 40A Li-ion Lithium Battery 18650 Charger PCB BMS Protection Board with Balance For Drill Motor 14.8V 16.8V Lipo Cell Module

4S 40A Li-ion Lithium Battery 18650 Charger PCB BMS Protection Board with Balance For Drill Motor 14.8V 16.8V Lipo Cell Module

4S 40A Li-ion Lithium Battery 18650 Charger PCB BMS Protection Board with Balance For Drill Motor 14.8V 16.8V Lipo Cell Module

4S 40A Li-ion Lithium Battery 18650 Charger PCB BMS Protection Board with Balance For Drill Motor 14.8V 16.8V Lipo Cell Module

4S 40A Li-ion Lithium Battery 18650 Charger PCB BMS Protection Board with Balance For Drill Motor 14.8V 16.8V Lipo Cell Module

4S 40A Li-ion Lithium Battery 18650 Charger PCB BMS Protection Board with Balance For Drill Motor 14.8V 16.8V Lipo Cell Module

4S 40A Li-ion Lithium Battery 18650 Charger PCB BMS Protection Board with Balance For Drill Motor 14.8V 16.8V Lipo Cell Module

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