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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.
| Project | Min. | Typ. | Max. | Units |
| Consuming current | 12 | 18 | 24 | uA |
| Overcharged protection voltage | 4.2 | 4.25 | 4.3 | V |
| Balanced starting voltage | 4.17 | 4.2 | 4.23 | V |
| Equilibrium current | 95 | 100 | 105 | mA |
| Balanced heating power | 1.56 | 1.72 | 1.91 | W |
| Overcharge recovery voltage | 4.1 | 4.15 | 4.2 | V |
| Over-discharge protection voltage | 2.4 | 2.5 | 2.6 | V |
| Overvoltage protection after over-discharge protection | 2.8 | 3 | 3.2 | V |
| Overvoltage protection after over-discharge protection | 3.2 | 3.5 | 3.8 | V |
| Over-discharge recovery voltage | 2.9 | 3.2 | 3.3 | V |
| Conduction internal resistance | 2.5 | 3 | 3.5 | mΩ |
| Overcurrent protection current C | 70 | 80 | 90 | A |
| Overcurrent delay time | 100 | 150 | 200 | ms |
| Continuous operating current | 0 | 40 | 40 | A |
| Continuous output power | 0 | 672 | 672 | W |
| Ambient temperature | -40 | 25 | 85 | °C |
| Fault phenomenon | Fault check and cause | The solution |
| Unable to charge | Measuring the voltage of 4 groups of batteries. | Pair the battery pack well, do not mix |
| when one of the battery voltages exceeds 4.25V, | the good battery and the bad battery. | |
| the protection board will activate overcharge protection. | ||
| Unable to discharge | Measuring the voltage of 4 groups of batteries. | Pair the battery pack well, do not mix |
| when one of the battery voltages is lower than 2.7V, | the good battery and the bad battery. | |
| the protection board will activate the over-discharge | ||
| protection. | ||
| Charging/discharging | OV, 4.2V, S.4V, 12.6V, 16.8V miswired | Rewire or replace the new board |
| failure | (human failure, no warranty) | |
| Overcharge/overdischarge | OV, 4.2V, 8.4V, 12.6V, 16.8V miswired | Rewire or replace the new board |
| failure | (human failure, no warranty) | |
| Discharge protection | Check that the battery pack has sufficient discharge | Replace the battery pack with a higher |
| capability and check that the load's starting current | discharge capacity, or a protective | |
| exceeds the overcurrent protection current of the | plate with a larger current | |
| protection board. | (super working range) | |
| Component soldering | There is no connection between one of the components | Repair welding |
| and the PCB pad. | ||
| Component welding | There is a short circuit between two or more pins of the | Remove the component and re-weld |
| component. | ||
| Electrostatic breakdown A | In the unpowered state, measure the G, D, and S | Remove the replacement MOS tube |
| poles of the MOSFET. If the forward and reverse | ||
| resistances of any two pins are 0Q, | ||
| it indicates that it has broken down. | ||
| Electrostatic breakdown B | Remove the MOS tube and measure the resistance | Remove the replacement MOS tube |
| 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. |
Package includes:
3 x Battery Protection Board
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