Stlxy 21V 8MOS Balance Protection Board For Makita 18650 Angle Grinder Chainsaw Electric Wrench Protection Board

Semi-finishedproduct : No High-concerned chemical : none Electronic : No DIY Supplies : Electrical Brand Name : Stlxy Origin : Mainland China Output Voltage : 21V

Description For Balanced Protection Plate 18650 21V Sidelight Design With Balanced LED Sidelight Design

Applicable battery: 5S five string 3.7V ternary 18650 lithium battery, fully charged total voltage 21V, single cell 4.2V ️ Prohibited from direct use in 3.2V lithium iron phosphate batteries Power scheme: 8 N-channel MOS transistors are connected in parallel, significantly reducing the conduction resistance and lowering the temperature rise of the impact load Balancing function: Passive balancing during the charging phase, reducing the voltage difference between each battery cell and delaying battery capacity degradation Temperature protection: Reserved NTC thermistor welding position, closely attached to the battery cell for temperature measurement, high temperature automatic current limiting protection Complete set of protection thresholds Single section overcharge 4.25V; single section overdischarge 2.75V; charging overcurrent, discharging overcurrent, instantaneous short circuit lockout protection PCB process: Thickened copper foil wiring, capable of carrying high impact currents, suitable for heavy-duty working conditions of angle grinders and electric chain saws Wiring definition: Complete B0~B4 cell sampling terminals, P+, P - high current charge and discharge pads Suitable products: Makita style 21V angle grinder, electric chain saw, electric wrench, cutting machine and other heavy-duty electric tool battery packs

Designed for 5S series 18650 ternary lithium battery pack, full charge voltage 21V. Adopt 8 parallel N-channel MOSFETs to reduce Rds(on) and heat under heavy surge current. Built-in passive cell balancing during charging to minimize voltage deviation between cells. Support external NTC thermistor for real-time temperature monitoring and overheat protection. Full safety protection: over-charge, over-discharge, charge/discharge over-current and short-circuit lockout. Thick copper PCB layout optimized for angle grinder, chainsaw and impact wrench heavy loads. Standard pad layout compatible with common Makita-style battery housing for repair & DIY assembly. Notice: Not compatible with LiFePO4; strictly follow B0-B4 wiring order during soldering. label:yes