1pcs 5S 21V Lithium BMS Protection Board For Makita 100A Continuous Charge Discharge 18650 Power Battery Manager PCBA

Semi-finishedproduct : No High-concerned chemical : none Electronic : No DIY Supplies : Electrical Brand Name : Stlxy Origin : Mainland China

Features: 1.This product uses 5 dedicated lithium-ion battery ICs as processors to detect real-time information such as voltage, charging and discharging current, and environmental temperature of each battery, 2.Implement overcurrent protection functions for overcharging, discharging, and discharging batteries; 3.It has protection functions such as short circuit, charging overcurrent, temperature protection, etc; 4.The board has good quality and is equipped with thick copper hardware terminals, making it durable; 5.It does not generate heat after long time use, and is commonly used for battery pack of lithium Angle grinder ofMakitamodel.

Parameters: Continuous discharge current: 80A: 25A; 90A: 30A. Instantaneous (start-up) current: 80A: 80±3A; 90A: 90±3A Charging voltage: 4.25±0.025V Continuous charging current: 3A Overcharge detection voltage: 4.25±0.025V Overcharge detection delay time: 0.5S Overcharge recovery voltage: 4.0±0.025V Over-discharge detection voltage: 2.7±0.025V Over-discharge detection delay time: 1S Over-discharge release voltage: 3.0±0.025V Over-current detection voltage: 100mV Over-current detection delay time: 350ms Over-current protection lifting condition: charging recovery or load disconnection Short circuit protection condition: external load short circuit Detection delay time: 250us Short-circuit protection release condition: charging recovery or load disconnection Operating temperature range: -20-75°C

Package include: 1 x 5S 21V 80A 90A Lithium Battery Protection Board Li-ion Battery Charger Protection Board for Electric Tool

Suitable power cell: 5S five string 3.7V ternary lithium battery, full charge voltage 21V, compatible with 18650 power cell ️ Strictly prohibit the use of 3.2V lithium iron phosphate batteries! Current parameters: Continuous discharge current of 100A, able to withstand the peak current of torque shock at the moment of starting the electric tool MOS solution: Multiple low internal resistance power MOSFETs are connected in parallel, paired with thickened metal copper foil for uniform current distribution and lower temperature rise under heavy loads Balanced design: equipped with passive balancing resistors, balancing the voltage of 5 energy-saving cells during the charging stage, suppressing the expansion of voltage difference, and extending the battery cycle life Complete security protection system Overcharge protection: Single section 4.25V charging cut-off to prevent overcharging and bulging of battery cells Overdischarge protection: Single section 2.5V cut-off output to avoid permanent cell failure caused by deep power loss Overcurrent protection, load short-circuit self-locking protection, NTC high-temperature power-off protection Dual protection against reverse welding and charging of batteries, reducing the risk of assembly damage Shell adaptation: The solder pad layout and external dimensions are compatible with mainstream domestic Makita style battery cases on the market, and old batteries can be directly refurbished and replaced Charging matching: compatible with standard 5S 21V Makita dedicated ternary lithium battery charger, charging and cell balancing operate synchronously Product form: Complete PCBA finished board, pre soldered sampling circuit, MOS tube, and balancing resistor, directly spot welded 18650 battery cells

Designed for 5S ternary lithium cells with maximum full charge voltage 21V, suitable for 18650 high-rate power batteries. Continuous discharge current reaches 100A, capable of handling instantaneous peak torque current of impact wrenches and power tools. Multiple parallel low internal resistance MOSFETs and thick busbar realize uniform current distribution and mild temperature rise under heavy load. Built-in passive cell balance circuit to equalize voltage difference between cells and extend overall battery cycle life. Comprehensive multi-protection: over-charge, over-discharge, over-current, short-circuit, over-temperature and reverse polarity prevention. Size and pad layout match mainstream domestic Makita-style battery housing for direct battery pack refurbishment. Fully compatible with standard 5S 21V Makita lithium charger, charging and cell balance work simultaneously. Widely used for impact wrench, angle grinder, garden shear battery assembly, battery refurbishment and DIY energy storage projects. Notice: Only for ternary lithium cell,NOT compatible with lithium iron phosphate batteries. label:yes