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4S 40A Li-ion Battery Charger PCB BMS Protection Board with Balance for 14.8V 16.8V Drill Motor Lipo Cell Module
4S 40A Li-ion Battery Charger PCB BMS Protection Board with Balance for 14.8V 16.8V Drill Motor Lipo Cell Module
Regular price
$2.99 USD
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$2.99 USD
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Product Details
Feature:
- 4-string 16.8V 40A lithium battery protection board (with auto recovery function)
- Compatible with nominal voltages of 3.6V, 3.7V lithium batteries, including 18650, 26650, and polymer lithium batteries.
- Product Size:
- Standard/Enhanced Version: 45 * 55 * 3.4mm
- Balanced Version: 46 * 60 * 3.4mm
- Product Weight:
- Standard/Enhanced Version: 9.3g
- Balanced Version: 10.3g
- Charging Voltage: 16.8V - 18.1V
- Continuous Discharge Current (Upper Limit): 40A (reduce load current in poor cooling environments)
- Continuous Charge Current (Upper Limit): 20A
- Equalization Version: Suitable for starting current below 80A and power below 135W for drills.
Technical Specifications
| 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 | 2.8 | 3 | 3.2 | 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 |
Troubleshooting
| Fault Phenomenon | Fault Check and Cause | The Solution |
|---|---|---|
| Unable to Charge | Measure voltage of 4 groups of batteries. If a battery voltage exceeds 4.25V, overcharge protection activates. | Pair the battery pack well and avoid mixing good and bad batteries. |
| Unable to Discharge | Measure voltage of 4 groups of batteries. If a battery voltage is lower than 2.7V, over-discharge protection activates. | Pair the battery pack well and avoid mixing good and bad batteries. |
| Charging/Discharging Failure | Miswiring (e.g., OV, 4.2V, 8.4V, 12.6V, 16.8V) | Rewire or replace with a new board (no warranty for human errors). |
| Discharge Protection | Check battery pack's discharge capacity or if the load's starting current exceeds overcurrent protection current. | Replace battery pack or use protective plate with higher current capacity. |
| Component Soldering Issues | No connection between component and PCB pad; or short circuit between component pins. | Repair soldering; remove component and re-weld. |
| Electrostatic Breakdown | Check MOSFET's G, D, and S poles resistances; zero resistance indicates breakdown. | Remove and replace the MOS tube. |
Package Includes:
- 1 x Battery Protection Board
