3S 50A BMS 12V Lithium Battery Protection Board with Balancing — Common Port
This 3S 50A Battery Management System (BMS) protection board is engineered for 3-series 3.7V ternary lithium battery packs, delivering a nominal 12V output suitable for a wide range of power applications. With a 50A continuous discharge rating and an impressive 150A instantaneous peak current capacity, this BMS is well suited for medium-sized inverters, UPS backup systems, outdoor lighting setups, and electric power tools.
The board adopts a same-port (common port) design, meaning charge and discharge share the same positive and negative terminals — simplifying wiring and making installation more straightforward for battery pack builders. The integrated cell balancing function (42mAh balance current) ensures each cell in the pack stays at a matched voltage level, which improves both the usable capacity and the overall lifespan of the battery pack.
Built with high-voltage-rated discrete MOS transistors and an imported protection IC, the board provides reliable single-cell overcharge protection (4.25V ±0.025V) and over-discharge protection (2.70V ±0.05V), preventing cell damage from voltage abuse during charging and heavy load discharge. The compact 52×76×9mm footprint and 43g weight make it easy to integrate into tight battery enclosures.
This BMS is a dependable, proven solution for anyone assembling or rebuilding a 3S 12V lithium battery pack for DC power supply, portable energy storage, or replacement power systems.
Package Contains:
1 × 3S 50A BMS Lithium Battery Protection Board with Cell Balancing (Same Port)
1 x Balance wire
