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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
374
Shipping to: United States |
Express delivery: 7-12 business days |
Standard delivery: 15-25 business days
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We will work hard to deliver items to you after receiving your orders and make sure they arrive safely. Delivery details will be provided in your confirmation email.In most cases, orders are processed within 2 days.Under special circumstances, it will be delayed as follows: When you place an order on Saturday, Sunday or public holidays, it will be delayed for 2 days..Normally, it needs 5-7 working days (Monday to Friday) without being affected by flight delay or other environmental factors..Because our shipping service is worldwide so the delivery times will depend on your location so it may need a few times and please wait patiently if you are in remote districts or countries.1. Return & Exchange Policy
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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 | mu03a9 |
| 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 | 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
1 x Battery Protection Board
