3S 18650 Lithium Battery Protection Board

Description This 3-cell charger can be used with any 3.7V Lipo rechargeable battery. This board can serve continuous current up to 4A and a maximum discharge of 10A. The board features short circuit protection, overcharge protection, over-discharge protection, and overcurrent protection to ensure the security of battery pack. The main IC adopts original “Seiko” imported components. With protection functions such as overcharge, overdischarge, overcurrent, short circuit, etc., it is used for 3.7V lithium batteries with various capacities and shapes. It adopts Seiko protection IC, high-quality MOSFET such as VISHAY, AOS, IR, FR-4 low temperature coefficient board, well-designed and comprehensive testing. Small in size, suitable for many occasions that require high integration and low cost, can meet various performance requirements, and ensure the safety and reliability of the battery pack. Specifications: Compatible with: 18650 3.7V Lipos Cells Seiko S-8254AA protection chip FDS 4435A x 4 Model: HX-3S-FL25A-A Input Voltage: 12 – 13V Output Voltage: 11.1-12.6V Operating current: 5-8A Transient Current: 9A-10A Overcharge Detection Voltage: 4.25V ~ 4.35V±0.05V Over-discharge Detection Voltage: 2.3V ~ 3.0V±0.05V Operating Temperature: -40℃ ~ 50℃ Quiescent Current: 6uA Internal Resistance: 60mΩ Service Life: 30 000 hours Size: 50 x 16 x 1mm Weight: 4g   Screenshot Screenshot Screenshot Notes: Higher than 3A current discharge product, the discharge rate of battery discharge is above 3C. Multiplier calculation formula: 1C battery, 2000 capacity is equal to 2AH * 1 = 2A maximum working current. 3C ratio battery, 2000 capacity is equal to 2AH * 3 = 6A maximum working current. In the process of use, if the battery heat, the battery power is not applicable.This situation cannot be used for a long time. Otherwise the battery will soon be damaged In order to make the equalisation effect better and consistent balance, try to use 13V switching source to charge (the self-stop current is less than 30mA). Because the equalization current of the equalization IC is about 45mA, and most of the 12.6V lithium battery chargers on the market will stop automatically when the charging current is lower than 100mA. If there is no equalization, no charge will come in, causing the voltage of each battery to be unbalanced. Regarding the voltage drop between the battery voltage and the output terminal voltage, the working principle of this type of protection board is negative protection. Some of them will have a voltage drop of 0.1-0.3V when they are combined, and the voltage drop will be reduced after several cycles of charging and discharging. ,it `s just normal. The charger should not use 12V power supply as much as possible. The full charge of 3 strings of lithium batteries is 12.6V, and the 12V power supply will cause insufficient charging, and the protection board will not protect it. It will always be charged. Long-term use will affect the battery. Life span has an impact, thank you for your understanding. Packing List: 1 x 3S 18650 Lithium Battery Protection Board